# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# This is GNU Go, a Go program. Contact gnugo@gnu.org, or see       #
# http://www.gnu.org/software/gnugo/ for more information.          #
#                                                                   #
# Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,   #
# 2008 and 2009 by the Free Software Foundation.                    #
#                                                                   #
# This program is free software; you can redistribute it and/or     #
# modify it under the terms of the GNU General Public License       #
# as published by the Free Software Foundation - version 3,         #
# or (at your option) any later version.                            #
#                                                                   #
# This program is distributed in the hope that it will be           #
# useful, but WITHOUT ANY WARRANTY; without even the implied        #
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR           #
# PURPOSE.  See the GNU General Public License in file COPYING      #
# for more details.                                                 #
#                                                                   #
# You should have received a copy of the GNU General Public         #
# License along with this program; if not, write to the Free        #
# Software Foundation, Inc., 51 Franklin Street, Fifth Floor,       #
# Boston, MA 02111, USA                                             #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
#  Second Generation Pattern Database.
#
#  New patterns that are not from patterns.db
#
##############################
#
#  The patterns are classified into a number of different categories:
#
#  Conn	    Connection patterns
#  Cut	    Cut patterns
#  AS	    Antisuji patterns (i.e. prohibitted moves)
#  Shape    Shape moves
#  Sente    Followup moves (add followup or reverse_followup values)
#  DD	    Double threat moves and defense against double threats
#  Temp     Temporary patterns to correct certain misbehaviours.
#
##############################


attribute_map general

goal_elements none
# FIXME: try to make callback_data pattern category specific
callback_data XOxo


##############################
#
# Connection of one space jump
#
# O.O
#
##############################


Pattern Conn101

O*O        straight connection

:+,C


Pattern Conn102

O.O        tiger connection
?*?

:|,C

bac
?*?

;odefend_against(*,a) && !oplay_attack(*,b) && !oplay_attack(*,c)


Pattern Conn103

O.O        indirect connection
*..

:8,C

OaO
*bc

;oplay_attack(*,a,b,c,a) || oplay_attack(*,a,b,c,c)


Pattern Conn104

.O.O        indirect diagonal connection
*...

:8,C

.OaO
*dbc

;oplay_attack_either(*,a,b,c,a,c) && !oplay_defend_both(*,a,b,d,c,a,d)


Pattern Conn105

OXO         defend connection
.*.

:8,C

aXb
.*.

;!oplay_break_through(*,a,*,b)


Pattern Conn106

??.?        indirect connection
*O.O
....

:8,C

??e?
*OaO
.dbc

;oplay_attack(*,a,b,e,c,d,d)


########################
#
# Connection of diagonal
#
# O.
# XO
#
########################


Pattern Conn201

O*         solid connection
xO

:/,C


Pattern Conn202

O.*        tiger's mouth connection
xO?

:8,C

ba*
xc?

;odefend_against(*,a) && !oplay_attack(*,b) && !oplay_attack(*,c)


Pattern Conn203

XO?         far away connection, might leave much aji
O.?
??*

:\,C

XO?
Oa?
??*

;odefend_against(*,a)


Pattern Conn204

?XO         increase liberties to secure connection
*O.

:8,C

?XO
*Oa

;odefend_against(*,a)


Pattern Conn205

XO*         extend to secure connection
O.?

:8,C

BO*
Oa?

;oplay_attack_either(*,a,a,B)


Pattern Conn206
# see trevord:740

..O   very indirect connection
.OX
*X.

:8,C

.aO
.OX
*X.

;oplay_attack(*,a,a)


Pattern Conn207
# gf New pattern. (3.7.1)
# See olympiad2004:102.

?.X   kikashi to give bad shape before connecting
..X
*XO
.O.

:8,C

?.X
..X
*Xa
.O.

;lib(a)>1


#####################
#
# Connection of keima
#
# O..
# ..O
#
#####################


Pattern Conn301

O*.        solid connection
?.O

:8,C


Pattern Conn302

O.?        bumping connection
X*O

:8,C

Oa?
B*O

;oplay_attack_either(*,a,a,B)


Pattern Conn303
# gf Revised constraint. (3.3.3)

O..*        kosumi connection
..O?

:8,C

Obc*
eaf?

;oplay_attack_either(*,a,b,c,a,c) && oplay_attack_either(*,b,a,e,b,e)
;&& oplay_defend_both(*,c,*,f)


Pattern Conn304
# gf Revised constraint. (3.3.3)

O..*        kosumi connection
X.O?

:8,C

Obc*
Eaf?

;oplay_attack_either(*,a,b,c,a,c) && !oplay_defend_both(*,b,a,b,E)
;&& oplay_defend_both(*,c,*,f)


Pattern Conn305

O..?        nobi connection
..O*

:8,C

Obc?
eaO*

;oplay_attack_either(*,a,b,c,a,c) && oplay_attack_either(*,b,a,e,b,e)


Pattern Conn306

O..?        nobi connection
X.O*

:8,C

Obc?
EaO*

;oplay_attack_either(*,a,b,c,a,c) && !oplay_defend_both(*,b,a,b,E)


Pattern Conn307

O.X?        nobi connection
..O*

:8,C

ObD?
caO*

;!oplay_defend_both(*,a,b,a,D) && oplay_attack_either(*,b,a,c,b,c)


Pattern Conn308

O.*
..O

:8,C

Oa*
cbO

;oplay_attack_either(*,a,b,c,a,c)


Pattern Conn309

O.*
X.O

:8,C

Oa*
EbO

;!oplay_defend_both(*,a,b,a,E)


Pattern Conn310

..*
O..
..O

:8,C

..*
Obc
daO

;oplay_attack_either(*,a,b,c,a,c) && oplay_attack_either(*,b,a,d,b,d)


Pattern Conn311

O*.
?XO

:8,C

O*a
?BO

;oplay_attack_either(*,a,a,B)


Pattern Conn312

O.*
xXO

:8,C

Oa*
xXO

;odefend_against(*,a)


Pattern Conn313

.O.
O.*
xXO

:8,C

bOc
Oa*
xXO

;oplay_attack_either(*,a,b,c,a,c) || oplay_attack_either(*,a,c,b,a,b)


Pattern Conn314

...
O.*
xXO

:8,C

.b.
ca*
xXO

;!oplay_break_through(*,a,b,c,b,*)


Pattern Conn315

O*X          cut through to connect 
.XO

:8,C

O*B
.AO

;!oplay_defend_both(*,A,B)


##############################################
#
# Connection of one space jump from two stones
#
# O..
# O.O
#
##############################################


Pattern Conn401

O..*        kosumi connection
O.O?

:8,C

Obc*
OaO?

;oplay_attack_either(*,a,b,c,a,c)


Pattern Conn402

O..?        nobi connection
O.O*

:8,C

Obc?
OaO*

;oplay_attack_either(*,a,b,c,a,c)


Pattern Conn403

O.O          bamboo joint
O.*

:8,C

A.O
A.*

;!oplay_attack(*,A)


##############################
#
# Connection of two space jump
#
# O..O
#
##############################


Pattern Conn501

O*.O

:-,C

O*aO

;odefend_against(*,a)


Pattern Conn502

O*.O
?...

:8,C

O*ac
?.b.

;!oplay_break_through(*,a,b,*,b,c)


Pattern Conn503

O..O
*...

:8,C

OacO
*bde

;oplay_attack_either(*,a,b,c,d,e,c,e) && !oplay_defend_both(*,a,b,d,c,a,d)
;&& oplay_attack(*,b,a,c,c)


Pattern Conn504

O..O
.*..

:8,C

OdaO
e*bc

;oplay_attack_either(*,a,b,c,a,c)
;&& (oplay_attack(*,d,d) || oplay_attack_either(*,d,b,e,d,e))


Pattern Conn505
# gf Revised constraint. (3.7.2)

?..?
OX.O
.*..

:8,C

?..?
aX.b
.*..

;!oplay_disconnect(*,a,b)


Pattern Conn506

OX.O
*O..

:8,C

ODbO
*Oac

;!oplay_defend_both(*,a,b,a,D) && !oplay_defend_both(*,b,a,c,b,c)


Pattern Conn507

O..O
X*..

:8,C

OabO
X*..

;oplay_attack(*,a,a) && oplay_attack(*,b,b)


Pattern Conn508

O..O
?*O?

:8,C

OabO
?*O?

;oplay_attack(*,a,a) && oplay_attack(*,b,b)


Pattern Conn509

o.X?
OX*O
....
----

:8,C

obX?
cX*O
.a..
----

;oplay_attack(*,a,a)
;&& !oplay_attack_either(*,b,a,*,a) && !oplay_attack_either(*,b,a,c,a)


Pattern Conn509b
# gf New pattern. (3.3.3)

?.X?
OX*O
....
----

:8,C

?.X?
aX*b
....
----

;!oplay_disconnect(*,a,b)


Pattern Conn510

O..O
..*.
....
?..O

:/,C

OADO
CB*d
..ba
?.cO

; oplay_attack(*,a,b,c,a) && oplay_attack(*,A,B,C,A)
; && oplay_attack_either(*,b,a,d,b,d)
; && oplay_attack_either(*,B,A,D,B,D)


######################
#
# Connection of ogeima
#
# O...
# ...O
#
######################


Pattern Conn601

O*..          Block across large knight's move
?X.O

:8,C

O*ac
?DbO

;!oplay_defend_both(*,a,b,a,D) && oplay_attack_either(*,b,a,c,b,c)


Pattern Conn602

O...
*..O

:8,C

Obde
*acO

;oplay_attack_either(*,a,b,c,d,e,c,e) && !oplay_defend_both(*,a,b,d,c,a,d)
;&& oplay_attack(*,b,a,c,c)


Pattern Conn603

...o          Block across large knight's move
O.*.
?.XO

:8,C

.b.o
ca*.
?.XO

;!oplay_break_through(*,a,b,*,b,c)


Pattern Conn603b
# gf New experimental pattern. Useful in nngs1:41. (3.1.30)

...o          Block across large knight's move
O.*.
?.XO

:8,C

...o
a.*.
?.Xb

;!oplay_disconnect(*,a,b)


Pattern Conn604

O...
.*.O

:8,C

Ocb.
d*ae

;!oplay_break_through(*,a,b,*,b,e) && !oplay_defend_both(*,c,d,a,b,c,a)


Pattern Conn605

O...
X*.O

:8,C

Ocb.
X*ad

;!oplay_break_through(*,a,b,*,b,d) && !oplay_defend(*,c,b,c)


Pattern Conn606

O*..
?..O

:8,C

O*bc
?daO

;oplay_attack_either(*,a,b,c,a,c) && oplay_attack_either(*,b,a,d,b,d)


Pattern Conn607

O..?
O.*.
?X.O

:8,C

Obc?
Oa*.
?X.O

;oplay_attack_either(*,a,b,c,a,c)


Pattern Conn608

...?
O.*.
?X.O

:8,C

.b.?
ca*.
?X.O

;!oplay_break_through(*,a,b,*,b,c)


Pattern Conn609

O.*.?
..XO.
.....
-----

:8,C

Ob*c?
eaXOd
..d..
-----

;!oplay_defend(*,a,b,c,d,a) && oplay_attack_either(*,c,a,b,d,e,b,e)


Pattern Conn610

OXX?
.*.O
----

:8,C

dBB?
e*ac
----

;oplay_attack(*,a,B) && !oplay_attack(*,c) && !oplay_attack(*,d)
;&& oplay_attack_either(*,e,B,e)


Pattern Conn611

OX.o
.*.O
----

:8,C

dB.o
a*.c
----

;oplay_attack_either(*,a,B,a) && !oplay_attack(*,c) && !oplay_attack(*,d)


##############################################
#
# Connection of two space jump from two stones
#
# O...
# O..O
#
##############################################


Pattern Conn701

O..?
O.*O

:8,C

Obc?
Oa*O

;oplay_attack_either(*,a,b,c,a,c)


Pattern Conn702

O.X?
O.*O

:8,C

ObC?
Oa*O

;!oplay_defend_both(*,a,b,a,C)


Pattern Conn703

O.*.
O.XO

:8,C

Ob*c
OaDO

;oplay_attack_either(*,a,b,c,a,c) && oplay_attack(*,c,c)
;&& oplay_attack(*,b,a,c,D)


Pattern Conn704

?..*
O...
O..O

:8,C

?..*
Odbe
OcaO

# This condition is not necessary but should be sufficient.
;oplay_attack(*,e,b,e)  && !oplay_defend_both(*,b,a,c,d,b,c)
;&& !oplay_defend_both(*,d,c,a,b,d,a)


Pattern Conn705

O..*
O..O

:8,C

Odb*
OcaO

# This condition is not necessary but should be sufficient.
;!oplay_defend_both(*,b,a,c,d,b,c)
;&& !oplay_defend_both(*,d,c,a,b,d,a)


Pattern Conn706

OXXO
O.*.
....
----

:8,C

dXXO
da*c
.b..
----

;!oplay_attack(*,a,b,d) && oplay_attack_either(*,a,b,c,a,c)


Pattern Conn707

O.XO
O.*.
....
----

:8,C

OdDO
Ob*a
ce..
----

;oplay_attack_either(*,a,a,D) && oplay_attack_either(*,b,a,c,b,D)
;&& oplay_attack_either(*,b,a,e,b,D) && oplay_attack_either(*,b,a,d,e,c,b,c)


Pattern Conn708

O*..         bend around
OX.O

:8,C

O*ac
ODbO

;!oplay_defend_both(*,a,b,a,D) && oplay_attack_either(*,b,a,c,b,c)


###########################
#
# Miscellaneous connections
#
###########################


Pattern Conn801

.O*.
O..O

:8,C

.O*.
Oa.O

;xcut(a)


#######################
#
# Cut of one space jump
#
# X.X
#
#######################


Pattern Cut101

...        cut with atari
X*X
OoO

:|,OB

...
A*B
aob

;lib(a)>1 && lib(b)>1 && (lib(A)==2 || lib(B)==2)


#################
#
# Cut of diagonal
#
# X.
# OX
#
#################


Pattern Cut201

X*         cut through diagonal
OX

:/,OB

X*
aX

;!oplay_attack_either(*,*,a)


##############
#
# Cut of keima
#
# X..
# ..X
#
##############


Pattern Cut302

X*.         cut through keima
.OX

:8,OB

X*a
.bX

;!xplay_attack_either(*,a,b,a)


Pattern Cut303
# gf Pattern and constraint revised. (3.3.3)

X*O         cut through keima
?OX

:8,B

C*a
?bD

;(alive(a) || alive(b)) && !xplay_disconnect(*,C,D) && !oplay_connect(*,C,D)


Pattern Cut304
# gf New pattern. (3.5.3)

?OO
X..         cut through keima
?*X

:8,OB

?OO
Dab
?*C

;!oplay_defend_both(*,a,b,C,D) && !oplay_connect(*,C,D)


#######################################
#
# Cut of one space jump from two stones
#
# X..
# X.X
#
#######################################

#######################
#
# Cut of two space jump
#
# X..X
#
#######################

Pattern Cut501

X.OX
..*.
....
----

:8,OB

XaeX
cb*d
....
----

;lib(e)==3 && xplay_attack_either(*,a,b,c,a,c)
;&& xplay_attack_either(*,a,b,d,a,d) && !xplay_defend(*,b,a,?,d,b)


###############
#
# Cut of ogeima
#
# X...
# ...X
#
###############


Pattern Cut601

XO..
.*.X
....
----

:8,OB

FOc.
d*aE
..b.
----

;!xplay_break_through(*,a,b,*,b,E) && !xplay_attack(*,a,b,d,c,F)


#######################################
#
# Cut of two space jump from two stones
#
# X...
# X..X
#
#######################################



####################
#
# Miscellaneous cuts
#
####################



###########################
#
# Antisuji moves. 
#
# These are moves which are locally inferior or for some other reason
# should never be played. Obviously, a certain amount of care must be
# taken with these patterns.
#
###########################

Pattern AS1
# It's tempting to make this usually bad descent an antisuji, but
# sometimes descending is correct e.g. in the "comb formation"
#
#     XXX
#   XXOOOXX
#   XO...OX
#   .*...O.
#  --------
#
# descending is the *only* move to live. So this should not be an antisuji.
# gf Reduced shape value. (3.5.2)

?XO     don't defend by moving straight down if it gives X a free forcing move
XO.
.*.
---

:8,-,shape(-3)

?XO
Xb.
a*.
---

;attack(b) && !oplay_attack(*,a,a) && oplay_attack(*,a,*)


Pattern AS2

?XO     don't play double hane at the edge
XO.
*..
---

:8,-

?XO
XOa
*b.
---

;!oplay_attack(*,a,a) && oplay_attack(*,a,b,b)

>antisuji(*);


Pattern AS3

OOX       don't play potentially risky gote move
*X.
---

:8,sOX

OdA
*Bc
---

;!weak(A) && !weak(B) && oplay_attack(*,c,*)

>antisuji(*);
>backfill_helper(*,c,d);


Pattern AS4
# gf New pattern. (3.1.2)

|*O       Connect without leaving bigger ko threat than necessary.
|OX
|.O
+--

:8,X

|*b
|OX
|ac
+--

;alive(b) && attack(c)

>replace(a,*);


Pattern AS5
# gf New pattern. (3.1.3)

?XO?
XO..
XO*.
.X..
----

:8,OX

?XO?
XOc.
XO*.
bDa.
----

;oplay_attack(a,*,b,c,D,a)

>replace(a,*);


Pattern AS6
# gf New pattern. (3.1.3)

|.O         if legal, take ko before filling ko
|OX
|X*
+--

:8,s

|ab
|OC
|X*
+--

;alive(b) && alive(C) && legal_omove(*)

>replace(a,*);


Pattern AS7
# pp New pattern (3.3.18)
# (Work-around problem with NonTerritory11, see valuation of M19 in
# endgame:830)
# It is shape-penalized since it can probably be a semeai attack/defense
# in exceptionally rare cases. But actually it is really an antisuji.

?XX?	    don't play stupid zero point gote
o*.o
----

:8,X,shape(-10)

aXXc
b*ed
----

; o_alive_somewhere(a,b) && o_alive_somewhere(c,d)
; && !oplay_attack(*,e,e)
; && (oplay_attack(*,e,*) || (o_somewhere(c) ? oplay_attack(*,e,c)
;					     : oplay_attack(*,e,d)))


###########################
#
# Shape moves. 
#
# The purpose of these patterns is to give a value to the shape
# obtained locally.
#
###########################


Pattern Shape1
# gf Revised constraint. (3.1.9)
# gf Revised constraint. (3.3.10)

OO      empty triangle. Ok if the empty point of the triangle is an eye.
.*

:8,-,shape(-2)

OO
a*

;!proper_eye(a) && !o_captures_something(*) && !x_captures_something(*)


Pattern Shape2
# gf Revised constraint. (3.3.10)

O*      empty triangle. Ok if the empty point of the triangle is an eye.
.O

:/,-,shape(-2)

O*
aO

;!eye(a) && !o_captures_something(*)


Pattern Shape3
# tm modified (3.1.23) (reduce shape penalty)
#  see blunder:15, trevord:800
# gf Revised constraint. (3.3.17)

O*      dango
OO

:/,-,shape(-1)

O*
OO

;!ko(*) && !o_captures_something(*)


Pattern Shape4

*.O     forcing move left behind
.OX
xXX

:8,-,shape(-2)

*.O
aOX
xXX

;!odefend_against(*,a)


Pattern Shape5
# gf Reduced shape value. (3.5.2)

?O.O     protect against atari or threat to atari
?.OX
?*XX

:8,-,shape(3)


Pattern Shape6
# gf Added constraint. (3.1.15)

*.O     classical good shape, unless it leaves a double atari
..O
OOX

:\,-,shape(2)

*.O
.aO
OOX

;oplay_attack(*,a,a)


Pattern Shape6b

*.O     secures eye
..O
OOo

:\,-,shape(1)


Pattern Shape7

*.X     eye-stealing move
..X
XXO

:\,-,shape(3)


Pattern Shape8a

...     ponnuki
.*.
OXO
.O.

:|,-,shape(5)


Pattern Shape8b

...     ponnuki
.*.
OXO
.OO

:8,-,shape(5)


Pattern Shape8c

...     ponnuki
.*o
OXO
.OX

:8,-,shape(5)


Pattern Shape8d

...     ponnuki defense
o*.
OXO
XO.
xXx

:8,-,shape(7)


Pattern Shape9a
# tm modified (3.1.18)
# tm modified (3.1.20)

ooo     don't give opponent ponnuki
o*o
XOX
.X.

:|,-,shape(5)

bdB
c*C
eOf
.X.

; lib(e) > 1 && lib(f) > 1
; && (o_alive_somewhere(c) + o_alive_somewhere(C) + o_alive_somewhere(d) <= 1)
; && !(o_alive_somewhere(d) && (o_alive_somewhere(b) || o_alive_somewhere(B)))


Pattern Shape9b
# tm modified (3.1.18)
# tm modified (3.1.20)
# ab I don't understand this pattern. X has already played at LR of
# the pattern, so ponnuki is slow. Unless * attacks the eye space of X,
# I see no point in pulling this stone out.

ooo     don't give opponent ponnuki
o*o
XOX
.XX

:8,-,shape(4)

bdB
c*C
eOf
.XX

; (o_alive_somewhere(c) + o_alive_somewhere(C) + o_alive_somewhere(d) <= 1)
; && !(o_alive_somewhere(d) && (o_alive_somewhere(b) || o_alive_somewhere(B)))
; && !attack(e) && !attack(f)


Pattern Shape9c
# tm modified (3.1.20)

ooo     don't give opponent ponnuki
o*o
XOX
.XO

:8,-,shape(5)

bdB
c*C
eOA
.fO

; (o_alive_somewhere(c) + o_alive_somewhere(C) + o_alive_somewhere(d) <= 1)
; && !(o_alive_somewhere(d) && (o_alive_somewhere(b) || o_alive_somewhere(B)))
; && !attack(A) && !attack(e) && !attack(f)


Pattern Shape10

xXx     force opponent into bad shape or ko
..X
*XO
oOo

:8,-,shape(3)


Pattern Shape11
# gf Revised constraint. (3.1.3)

?..x    Don't push from behind with few liberties (want to avoid double hane).
x.*X
?.OX
??X?

:8,-,shape(-3)

?..x
x.*X
?.bX
??A?

;lib(A)>1 && !dead(b)


Pattern Shape12

?..x    Don't push from behind with few liberties (want to avoid double hane).
?...
x.*X
?.OX
??OX
??X?

:8,-,shape(-2)

?..x
?...
x.*X
?.OX
??OX
??A?

;lib(A)>1


Pattern Shape12b
# gf Reduced shape value. (3.5.2)

..x     Don't push from behind with few liberties if we have to bend after hane
.*X
.OX

:8,-,shape(-3)

bax
.*C
.OC

;!oplay_attack_either(*,a,a,C) && oplay_attack(*,a,b,*)


Pattern Shape13
# Such huge shape values can cause problems. See handtalk12.sgf, move 37
# (where * is actually an owl defense). -Arend
# gf Reduced shape value. (3.5.2)

?X?     don't set up double cut
*.O
.O.

:8,-,shape(-3)

?X?
*aB
cOb

;!oplay_attack_either(*,a,b,c,a,c) && !oplay_attack_either(*,a,c,b,a,b) && !alive(B)


Pattern Shape14

xXO?    better connect solid at once than leaving a kikashi
.O.x
xX*?

:8,X,shape(-2)

xAO?
aO.x
xB*?

;!oplay_attack(*,a,A) && !oplay_attack(*,a,B) && !oplay_attack(*,a,a)


Pattern Shape15

xXO?    better connect solid at once than leaving a kikashi
.O.*
xXx?

:8,X,shape(-2)

xAO?
aO.*
xBx?

;!oplay_attack(*,a,A) && !oplay_attack(*,a,B) && !oplay_attack(*,a,a)


Pattern Shape16
# gf Added constraint. (3.3.10)
# Usually better to capture if either stone in atari.

?XO     clean cut
*Oo
?X?

:8,-,shape(1)

?BO
*Oo
?A?

;lib(A)>1 && lib(B)>2


Pattern Shape17
# The solid connection is better than nothing if the descent doesn't work

O*.     X can still connect underneath
XOX
...
---

:8,-,shape(-2)

O*.
BOC
.a.
---

;!oplay_attack(*,a,a) && !oplay_attack(*,a,B) && !oplay_attack(*,a,C) && oplay_attack(a,*,*)


Pattern Shape18
# gf Added n classification. (3.3.20)

O.O     tiger
.*X

:8,n,shape(2)

OaO
b*X

;odefend_against(*,a) && (oplay_attack(*,b,b) || !oplay_attack(*,b,*))


Pattern Shape18b
# Negate shape bonus if X can force O to fill the tiger's mouth.

??.    tiger
O.O
.*X

:8,-,shape(-2)

??a
O.b
.*C

;lib(b)==2 && lib(C)>3 && !oplay_attack(*,a,a)


Pattern Shape18c
# Negate shape bonus if X can connect "beneath".
# gf New pattern. (3.1.4)

?O.O     tiger
X.*X
....

:8,-,shape(-3)

?OdO
Xc*E
.ba.

;oplay_attack(*,a,b,c,d,b) && lib(E)>3


Pattern Shape19
# gf Revised constraint. (3.3.2)

X.X     stop enemy tiger
.*O

:8,-,shape(2)

XaB
.*O

;lib(B)>1 && xdefend_against(*,a)


Pattern Shape20
# delta_moyo currently overvalues this move, so we compensate here
# gf Reduced shape value. (3.5.2)

XO.     bad aji
O..
..*
...
---

:8,-,shape(-3)


Pattern Shape21
# almost always best to capture immediately

?XO?
XOXO
..*?
----

:8,-,shape(1)


Pattern Shape22

O.*X    Wrong reinforcement
..OX
....
----

:8,-,shape(-2)

O.*X
.cOX
.bad
----

;oplay_attack(*,a,b,c,d,*)


Pattern Shape23

.OXx    Usually better to connect solidly
..OX
.*..
----

:8,-,shape(-1)


Pattern Shape24
# delta_terri should see the value of this move, but currently needs help

?X??    Usually better to connect solidly
O*.O
....
----

:8,-,shape(1)


Pattern Shape25
# gf Reduced shape value. (3.5.2)

...x
.*.X     Don't cap with weak stone that can be cut off.
....
xx.O

:8,-,shape(-3)

...x
.*.X
....
xx.a

;weak(a)


Pattern Shape26

XO?    Bad shape after atari on first line
O.*
...
---

:8,s,shape(-1)

XO?
b.*
a..
---

;lib(b)==2 && !oplay_attack(*,a,a)


Pattern Shape27

?XO?    Bad shape after atari on first line
XO..
...*
----

:8,-,shape(-1)


Pattern Shape28

O.XO    Avoid diagonal move that allows X to cut.
.*..

:8,X,shape(-4)

O.XO
.*a.

;!oplay_attack(*,a,a)


Pattern Shape29
# gf Revised constraint. (3.1.20)

O.*    Avoid setting up double threat.
?X?

:8,X,shape(-5)

ba*
?X?

;(!attack(b) || defend(b)) && !oplay_defend_both(*,a,*,b)


Pattern Shape30
# In this position any move that defends the lower O stone will be
# assumed to break the connection, although X might connect
# underneath. Therefore we give some extra encourage to the real cut.
# If this move isn't safe, it won't be suggested anyway.

?O?
o.o
XOX
.*.
---

:|,X,shape(1)

?O?
o.o
XaX
.*.
---

;attack(a)


Pattern Shape31

XOo     Very seldom the right connection.
O..
O*.
---

:8,-,shape(-1)


Pattern Shape32

XO?     Bad aji.
x.*
O.O
?.X

:8,X,shape(-1)

Xa?
x.*
O.O
?.X

;lib(a)==2


Pattern Shape33

?O.      Never bad to make an eye.
O.*
oO.

:8,-,shape(1)


Pattern Shape34

?X?      Don't descend if we can (and have to) capture.
XOX
.*.
---

:8,X,shape(-3)

?X?
BOX
.*a
---

;lib(B)==1 && !oplay_attack(*,a,a)


Pattern Shape35

O.O      Good shape
O..
XO*
???

:8,-,shape(1)


Pattern Shape36

OX.O     Very inefficient move
XO..
.*..
----

:8,-,shape(-2)

OB.O
XOa.
.*..
----

;oplay_defend(*,B) && oplay_attack(*,a,*)


Pattern Shape37

OX.O     Good shape
XO*.
....
----

:8,-,shape(1)


Pattern Shape38

X.O     Usually inefficient
O..
*..
---

:8,-,shape(-1)


Pattern Shape39

O..     good shape
..O
O*X

:8,-,shape(1)

b..
..a
O*X

;lib(a)>2 && lib(b)>2


Pattern Shape40

O.X     eye-stealing move
..X
XX*

:\,-,shape(1)


Pattern Shape41
# Notice that this pattern gives one more shape point for the previous
# pattern.

O.x     eye-stealing move
..X
xX*

:\,-,shape(1)


Pattern Shape42
# Sometimes the life and death code comes up with both this move and
# the more solid move one line higher. Prefer the latter.

O.o
X..
.*.
---

:8,O,shape(-2)


Pattern Shape43

?XO.    usually better to connect solidly than leaving peep behind
xO..
..*.
----

:8,-,shape(-2)


Pattern Shape44
# This pattern may be a little too general but is probably good.

?...?    extend when faced with contact instability
?.OX?
?.*.x
??.??

:8,-,shape(2)

?...?
a.OX?
?.*.x
??.??

;!xmoyo(a)


Pattern Shape45
# gf Added constraint. (3.1.3)

xxx?    usually better to connect and block on third line
O..O
*...
....
----

:8,-,shape(-1)

CDE?
a..b
*...
....
----

;!same_dragon(a,b) || x_alive_somewhere(C,D,E)


Pattern Shape46
# gf Reduced shape value. (3.5.2)

?XXO    blocking one step to the left usually much superior
.O.*
....
----

:8,-,shape(-3)

?XXb
.Oa*
....
----

;lib(b)>=3 && oplay_attack(a,*,*)


Pattern Shape47

x.O     too vulnerable to cutting
O.X
.*X
xx?

:8,-,shape(-3)


Pattern Shape48
# gf Added constraint. (3.3.15)
# gf Revised pattern. (3.3.16)

.X.     makes it harder for X to make eyes
*.X
?xx

:8,s,shape(1)

.A.
*.X
?xx

;weak(A)


Pattern Shape49

OXx     avoid descending if it leaves a kikashi
XOX
.OX
.*.
---

:8,-,shape(-1)

OXx
XOX
.OX
.*a
---

;oplay_attack(*,a,*) && !oplay_attack(*,a,a)


Pattern Shape50

xO.xx     connect after nozoki
X*.xx
xO.xx

:-,OX,shape(5)


Pattern Shape51

O..     empty triangle on the edge
O*.
---

:8,-,shape(-2)


Pattern Shape53

?X?     good for eyespace and to avoid shortage of liberties
O*O
...
---

:|,-,shape(1)


Pattern Shape54

?X?     often stupid
O.O
..*
---

:8,-,shape(-1)


Pattern Shape55
# gf Reduced shape value. (3.5.2)

O.      don't force opponent to cut
X.
.*

:8,-,shape(-3)

a.
X.
.*

;weak(a)


Pattern Shape56

?XO.    don't defend by moving straight down if X can peep
XO..
.*..
----

:8,O,shape(-3)


Pattern Shape57

..O          avoid moves at cross purposes
O.X
.*.

:8,OX,shape(-3)


Pattern Shape58

O.XO         effective block
..*O
..xx

:8,-,shape(3)

O.AO
..*O
..xx

;lib(A)==3


Pattern Shape59
# gf Reduced shape value. (3.5.2)

?X.O         usually stupid, other atari or descent generally better
XOXO
..*.
----

:8,-,shape(-3)


Pattern Shape60

..O?         don't connect this way because it leaves bad aji
...O
..*o
----

:8,-,shape(-3)


Pattern Shape60b
# gf New pattern. (3.1.3)

..O?         this connection on the other hand is usually good
..*O
...o
----

:8,-,shape(1)


Pattern Shape60c
# gf New pattern. (3.1.14)

..OX?        usually we want to avoid this connection too
...OX
...*O
-----

:8,-,shape(-1)


Pattern Shape61

xX...       connecting preferred to alternative defenses
XOX..
O*O..
.....
.....
-----

:8,-,shape(3)


Pattern Shape62

?OO??
O...x        not so good shape on the edge
O.*.x
-----

:8,-,shape(-3)


Pattern Shape63

??xO.        might connect, but horrible amounts of aji
?X...
.XO..
..*..
-----

:8,-,shape(-3)


Pattern Shape64

?O..         never correct shape
O...
?O*.
----

:8,-,shape(-3)


Pattern Shape65

?O..         good solid shape
O.*.
?O..
----

:8,-,shape(1)

bO..
O.*.
aO..
----

;o_alive_somewhere(a,b)


Pattern Shape66
# db increased negative shape (3.1.7)
# ab added ??? lines added as jump is often good on 3rd line
# gf This is way too general. Added constraint. (3.5.3)

xX.         often bad to leave a gap
O.*
...
???
???

:8,-,shape(-3)

xX.
ca*
.b.
???
???

;oplay_disconnect(*,a,b,*,c)


Pattern Shape67
# gf New pattern. (3.1.3)

?XX?        when played as a ko threat, this is often inefficient
X*OX
..X?

:8,sX,shape(-1)

?XX?
X*OX
..X?

;oplay_attack(*,*)


Pattern Shape68
# gf New pattern. (3.1.3)

OXxx        usually the right place for a small ko threat in this shape
X*.x
XX..
----

:8,sOX,shape(1)

OXxx
A*.x
AA..
----

;lib(A)==2


Pattern Shape69
# gf New pattern. (3.1.13)

?XXX??      usually the right way to strengthen the position
XO.O*.
XO....
......
------

:8,-,shape(1)


Pattern Shape70
# gf New pattern. (3.1.14)

OX..      better to capture cleanly
.*..
----

:8,-,shape(-2)

OAb.
.*..
----

;!oplay_defend(b,A)


Pattern Shape71
# gf New pattern. (3.1.14)

?XO..     the descent leaves a peep
XO...      
.*...
-----

:8,-,shape(-1)


Pattern Shape72
# gf New pattern. (3.1.14)
# gf Reduced shape value. (3.5.2)

?XO.     don't leave double threat behind
XO..      
*...
----

:8,-,shape(-3)

?Xc.
Xba.
*...
----

;!oplay_defend_both(*,a,b,c)


Pattern Shape73
# gf New pattern. (3.1.14)

?OO      cancel empty triangle negative shape when we create an eye
O.*
OoO

:8,-,shape(2)

?OO
Oa*
OoO

;!proper_eye(a)


Pattern Shape73b
# gf New pattern. (3.1.20)
# See strategy3:120. This pattern favors C7 to D8.

?OO      some more shape if opponent could atari to destroy eye
O.*
OoO

:8,-,shape(1)

?AA
O.*
OoO

;lib(A)==2 && xlib(*)>1


Pattern Shape74
# gf New pattern. (3.1.14)

o..?     don't leave cutting points around
O...
X.Ox
?*.x
oO.?

:8,-,shape(-1)


Pattern Shape75
# gf New pattern. (3.1.15)

?Xxx
.OXx
..*.
....
----

:8,-,shape(-1)

?XDx
bOXx
.a*c
....
----

;(x_alive_somewhere(D) || oplay_attack(*,?,D,D)) && !oplay_defend(*,a,b,c,*)


Pattern Shape76
# tm New Pattern. (3.1.16) (see trevor:220)
# gf Reduced shape value. (3.5.2)

----
....
....
O.*.

:8,-,shape(-3)

----
....
CbE.
DA*.

; xlib(A) > 2
; && oplay_attack(*,A,b,C,D)
; && oplay_attack(*,A,b,E,C,*)


Pattern Shape77
# gf New pattern. (3.1.18) (see trevor:382)

oOO
O..
XO*
---

:8,-,shape(-3)


Pattern Shape78
# gf New pattern. (3.1.18) (see trevor:382)

oOO
O.*
XO.
---

:8,-,shape(1)


Pattern Shape79
# gf New pattern. (3.1.20) (see trevord:610,630,640)

OOo       Almost always better to block on second line
X..
*..
---

:8,O,shape(-2)

OOo
A..
*..
---

;lib(A)==2


Pattern Shape80
# tm New Pattern (3.1.22) (see trevora:390)

|O.O
|..O
|*.O
|..o
+---

:8,-,shape(1)


Pattern Shape81
# tm New Pattern (3.1.22) (see trevora:300)
# FIXME: potentially bad for ko threats.

.*o
O..
XOO

:8,X,shape(1)


Pattern Shape82
# gf New pattern. (3.1.32) (see trevorb:280)

|XXO        Prefer this as ko threat since it gives a second one
|.*X
|.X?
|.??

:8,sX,shape(2)

|AAO
|.*X
|.X?
|b??

;!weak(A) && lib(A)==2 && xterri(b)


Pattern Shape83
# gf New pattern. (3.3.3) (see trevorc:310)

*X?        don't leave double atari behind
.OX
..O

:8,sX,shape(-2)

*X?
daX
.cb

;!oplay_defend_both(*,c,a,b) && oplay_attack(d,c,c)


Pattern Shape84
# gf New pattern. (3.3.3) (see trevorc:1310)

OX?        connect correctly
.OX
.*O
---

:8,sX,shape(-2)

OX?
bOX
.*a
---

;lib(a)>1 && xlib(b)>1 && oplay_attack(*,b,*)


Pattern Shape85
# gf New pattern. (3.3.10)
# Usually less aji when attacking at c rather than *.

OOX        attack correctly
*XO
...
xxx

:8,sX,shape(-1)

aaX
*BO
.c.
xxx

;(xlib(*)==2 || (lib(a)>2 && xlib(*) < xlib(c)))
;&& !oplay_defend(c,B)


Pattern Shape86
# gf New pattern. (3.3.15)
# Prefer cut to peep as ko threat.
# gf Revised constraint. (3.3.16)

XO        ko threat
*X

:/,sX,shape(1)

AO
*B

;oplay_attack_either(*,A,B) && !safe_omove(*)


Pattern Shape87
# gf New pattern. (3.5.3)
# gf See gifu03:501

.OXx       usually better to extend than atari in cross cut
.XO.
.*..

:8,sX,shape(-1)

.aXx
.Xb.
.*..

;!dead(a) && !dead(b) && weak(a) && weak(b) && oplay_disconnect(*,a,b)


Pattern Shape88
# gf New pattern. (3.7.2)
# See gunnar:55.

?X.X        more potential for followup ko threats one step to the right
X*.X
?XXO

:8,sX,shape(-1)

?XbX
X*.X
?AAO

;lib(A)==2 && olib(*)==1 && olib(b)==1


###########################
#
# Followup moves. 
#
# The purpose of these patterns is to give a rough estimate of the
# value of followup moves, either to this move or to moves the
# opponent could continue with if we do not defend now.
#
###########################


Pattern Sente1

?X?     Defend to avoid cutting points
XOX
O*o

:8,-,reverse_followup(5)

?X?
XOB
a*o

;lib(B)>1 && xplay_attack(*,a)


Pattern Sente1b

*X?     Capture to avoid cutting points
XOX
O.o

:8,-,reverse_followup(5)

*X?
COX
bao

;lib(C)==1 && xplay_attack(a,b) && oplay_attack(*,a,a)


Pattern Sente1c

OX?     Capture to avoid cutting points
XOX
*.o

:8,-,reverse_followup(5)

bX?
COX
*ao

;lib(C)==1 && xplay_attack(a,b) && oplay_attack(*,a,a)


Pattern Sente1d
# gf New pattern. (3.3.10)

?OX?     Capture to avoid cutting points
*XOX
?O.o

:8,-,reverse_followup(5)

?OX?
*COX
?bao

;lib(C)==1 && xplay_attack(a,b) && oplay_attack(*,a,a)


Pattern Sente2

.X.     Defend to create cutting points
XOX
O*O

:|,-,followup(5)

.B.
AOC
O*O

# Better to capture A or C at once if either in atari
;oplay_break_through(*,A,B,C) && lib(A)>1 && lib(C)>1


Pattern Sente3

?XOO      Block on edge.
XOX*
....
----

:8,-,followup(6)


Pattern Sente4

oOX.      Hanetsugi
.*OX
----

:8,-,followup(6)

oOA.
.*OB
----

;oplay_attack_either(*,A,B) && !attack(B) && !attack(A)


Pattern Sente5
# The followup value is usually larger in practice.

*XX           force X to make dango
X.X
?XO

:8,X,followup(6)

*AA
X.A
?Xa

;lib(A)==2 && lib(a)>1


Pattern Sente6
# The followup value is usually larger in practice.

XXX           force X to make dango
X.X
*XO

:8,X,followup(10)

AAA
A.A
*Xa

;lib(A)==2 && lib(a)>1


Pattern Sente7
# tm modified (3.1.22) (added oplay_defend)

?O?
.X*
...
---

:8,X,followup(6)

?O?
.A*
...
---

;oplay_attack(*,A) && oplay_defend(*,A)


Pattern Sente8

O..
*X.
...
---

:8,OXd,followup(8)

O..
*A.
...
---

;oplay_attack(*,A)


Pattern Sente9

?X*O      Cut
.OX.
....
----

:8,-,followup(6)


Pattern Sente10
# FIXME: The followup value should be related to the size of A.

.O.?
...X
OXX*

:8,-,followup(5),shape(1)

.O.?
...X
OAA*

;lib(A)==3 && oplay_attack(*,A)


Pattern Sente11

?OO?
.XX*
....
----

:8,X,followup(9)

?OO?
.AA*
....
----

;oplay_attack(*,A)


Pattern Sente13
# gf Revised constraint. (3.1.20)

*O

:-,sO

*a

;lib(a) == 2 && !attack(a) && safe_xmove(*) && safe_omove(*)
# Action adds a reverse followup value.
>defend_against_atari(a)


Pattern Sente13b
# gf Revised constraint. (3.1.10)
# gf Revised constraint. (3.3.16)
# gf Revised constraint. (3.5.3)

.O
*?

:8,sO

ba
*c

;lib(a) == 2 && !attack(a) && olib(b) > 2 && safe_omove(*)
;&& (safe_xmove(*) || safe_xmove(b))
;&& (oplay_attack(*,b,b)==WIN
;    || (x_somewhere(c) && oplay_attack_either(*,b,b,c)))
# Action adds a reverse followup value.
>defend_against_atari(a)


Pattern Sente13c
# gf New pattern. (3.3.16)

O.O
*.O

:8,sO

Oba
*ca

;lib(a) == 2 && !attack(a) && safe_omove(*)
;&& (safe_xmove(b) || safe_xmove(c))
;&& oplay_attack(*,b,b)==WIN
;&& oplay_attack(*,c,c)==WIN
# Action adds a reverse followup value.
>defend_against_atari(a)


Pattern Sente13d
# gf New pattern. (3.3.17)

..X
*.O
..O
oOX

:8,sO

..X
*ca
.ba
oOX

;lib(a) == 2 && !attack(a) && safe_omove(*)
;&& safe_xmove(*)
;&& !oplay_defend(*,b,c,b)
;&& xplay_attack(*,a)
# Action adds a reverse followup value.
>defend_against_atari(a)


Pattern Sente13e
# gf New pattern. (3.7.4)
# gf Removed O classification and revised constraint. (3.7.10)

*.O
?O?

:8,s

*ba
?O?

;alive(a) && lib(a) == 2 && !attack(a) && olib(b) > 2 && safe_omove(*)
;&& safe_xmove(b) && oplay_attack(*,b,b)==WIN
# Action adds a reverse followup value.
>defend_against_atari(a)


Pattern Sente14

OXx
.OX
O.*

:8,OX,reverse_followup(5)

aBx
.OC
Od*

;lib(a)>1 && !attack(B) && !attack(C) && xlib(d)>1


Pattern Sente15

OX.
oOX
oo*

:8,OX,followup(5)

aBd
eOC
fg*

;lib(a)>1 && o_alive_somewhere(e,f,g) && !attack(B) && !attack(C)
;&& !oplay_defend_both(*,?,d,B,C)


Pattern Sente16
# gf New pattern. (3.1.14)
# The constraint is unprecise, but correcting it probably
# require a handwritten helper.

.O?
.*X
---

:8,OX,reverse_followup(5)

bO?
a*X
---

;xplay_attack(*,a,b,*) && xplay_defend_both(*,a,b,*,b)


Pattern Sente17
# gf New pattern. (3.1.15)

.OXx
.*oX
----

:8,X,reverse_followup(5)

cdXx
a*bX
----

;alive(d) && !xplay_defend_both(*,a,b,?,c,a,d)


Pattern Sente18
# gf New pattern. (3.3.13)
# The reverse followup value is probably often bigger than 5 points.

X..O..
XOX*..
......
------

:8,X,reverse_followup(5)

C..b..
COX*.a
......
------

;omoyo_opposite(a) && alive(b) && alive(C)


Pattern Sente19
# gf New pattern. (3.3.16)
# Usually underestimating the reverse followup, but better than nothing.

?oO
o.*
?OX

:8,OX,reverse_followup(1)

?cO
ba*
?OX

;((!o_somewhere(b) && oterri(b))
; || (!o_somewhere(c) && oterri(c)))
;&& safe_xmove(*) && !xplay_attack(*,a,*)


Pattern Sente20
# gf New pattern. (3.3.16)
# Usually underestimating the reverse followup, but better than nothing.

?.O
..*
?OX

:8,OX,reverse_followup(2)

?cO
ba*
?OX

;oterri(b) && oterri(c) && safe_xmove(*) && !xplay_attack(*,a,*)


Pattern Sente21
# gf New pattern. (3.3.16)
# Usually underestimating the reverse followup, but better than nothing.

..O
..*
?OX

:8,OX,reverse_followup(3)

dcO
ba*
?OX

;oterri(b) && oterri(c) && oterri(d) && safe_xmove(*) && !xplay_attack(*,a,*)


Pattern Sente22
# pp New pattern, see trevord:950 (3.3.20)

?OX?
O.*.
?XX?

:8,OX

?OX?
Oa*b
?AA?

; oplay_attack(*,A) && oplay_attack(*,a,A) && oplay_attack(*,b,a,A)

> good_attack_threat(*,A)


Pattern Sente23
# gf New pattern. (3.5.4)
# See trevorc:450.

?OX
O.O
O*X

:8,O

?OX
a.c
a*B

;lib(a)>3 && alive(B) && xplay_attack(*,c)

>prevent_attack_threat(c);


Pattern Sente24
# pp New pattern (3.5.8)

?*?
XO.
?O.
---

:8,OX,reverse_followup(8)

?*?
XAb
?A.
---

; lib(A)==3 && safe_xmove(*) && !xplay_defend(*,?,b,A)


########################################################
#
# Double threat moves and defense against double threats
#
########################################################


Pattern DD1
# FIXME: This isn't really double atari - just plain old
#   capture also matches here.  see nngs:1260
#   Does this matter?

*X        double atari on you
XO

:\,X

*A
BO

>test_attack_either_move(A,B)


Pattern DD2

*O        double atari on me
OX

:\,nO

*a
bX

;!xplay_defend_both(*,a,b)

>add_defend_both_move(a,b);


Pattern DD2b

*.O        double atari on me, defended by hanging connection
?OX

:8,O

*ca
?bX

;!xplay_defend_both(c,a,b)
;&& (oplay_attack(*,c,c) || oplay_defend_both(*,c,a,b))

>add_defend_both_move(a,b);


Pattern DD3

OXX
X*.
X..

:8,O

OEE
D*c
Dba

;oplay_attack(*,D) && oplay_attack_either(*,a,D,E)
;&& !oplay_defend_both(*,b,c,D,E)

>test_attack_either_move(D,E)


Pattern DD4
# gf Revised constraint. (3.5.2)

XOO
O..
O.*

:8,O

Xee
dac
db*

;xplay_attack(a,d) && xplay_attack_either(a,*,d,e)
;&& !xplay_defend_both(a,b,c,d,e) && !xplay_defend_both(a,c,b,d,e)
;&& !xplay_connect(a,d,e) && oplay_connect(*,a,d,e)

>add_defend_both_move(d,e);


Pattern DD5
# gf Exclude this pattern when scoring. (3.3.14)
# This is somewhat wimpy. We should do more exact reading to verify
# whether it really is necessary.

XOO
O..
O.*

:8,O

Xcc
ba.
b.*

;!doing_scoring
;&& lib(c)<=4 && xplay_attack(a,b) && safe_xmove(a) && odefend_against(*,a)

>add_defend_both_move(b,c);


Pattern DD6
# al1 Revised symmetry. (3.7.11)

?o?          Double attack
X*X
?o?

:+,-

?o?
A*B
?o?

>test_attack_either_move(A,B)


Pattern DD7
# gf Revised constraint. (3.1.20)

*OX
?XO

:8,-

*dA
?Bc

;lib(d)<4 && (xlib(*)>1 || lib(d)<3)
;&& oplay_defend(*,A) && oplay_defend(*,B)
;&& !oplay_attack(*,c)

>test_attack_either_move(A,B)


Pattern DD8

O..       extend to connect
XO*

:8,O

ca.
Xb*

;safe_xmove(a) && !xplay_defend_both(a,b,c) && oplay_defend_both(*,a,b,c)

>add_defend_both_move(b,c);


Pattern DD8b
# gf Added constraint. (3.3.20)
# Not a problem if the opponent can't even threaten to cut after the move.

O..       extend to connect
XO*
?o.

:8,O,shape(-1)

ba.
XO*
?o.

;oplay_disconnect(*,a,*,b)


Pattern DD9

O.*       double atari on me
XO.

:8,O

ca*
Xb.

;safe_xmove(a) && !xplay_defend_both(a,b,c) && oplay_defend_both(*,a,b,c)

>add_defend_both_move(b,c);


Pattern DD10

*O.              generalized tsukenobi joseki
?XO

:8,-

*ba
?Xc

;(alive(b) || alive(c))
;&& safe_xmove(a)==WIN && !xplay_defend_both(a,b,c) && oplay_attack(*,a,a)==WIN

>add_defend_both_move(b,c);


Pattern DD11

X.?        double attack
O*.
??X

:8,-,shape(2)

A.?
O*.
??B

; !attack(A) && !attack(B) && oplay_attack(*,A) && oplay_attack(*,B)

>test_attack_either_move(A,B)


Pattern DD12
# gf Revised. (3.1.9)

OX?        double attack
X*.
X..
X..
---

:8,-

EB?
A*d
Ac.
A..
---

;lib(A)==3 && !oplay_attack(*,E) && oplay_attack(*,d,A)
;&& !oplay_defend_both(*,c,d,A,B)

>test_attack_either_move(A,B)


Pattern DD13
# gf Revised. (3.1.9)

XO?        double defense
O*.
O..
O..
---

:8,-

eb?
a*d
ac.
a..
---

;lib(a)==3 && !attack(e) && xplay_attack(*,d,a)
;&& !xplay_defend_both(*,c,d,a,b)

>add_defend_both_move(a,b)


###########################
#
# Temporary patterns to correct certain misbehaviours.
#
###########################


Pattern Temp1
# This joseki is played far too frequently.
# existed since at least 3.0.0

|........
|........
|.....*..
|...O....
|.....X..
|........
|........
+--------

:8,-,maxvalue(25)


Pattern Temp5
# Don't make a short jump along the edge before shimari.
# existed since at least 3.0.0
# tm Modified (3.1.20)

???xxxxx|
........|
........|
........|
.*..O...|
........|
........|
--------+

:8,-

???xxxxx|
........|
........|
........|
.*..O...|
........|
........|
--------+

>antisuji(*);


Pattern Temp6
# Don't make a short extension from san-san in open surroundings.
# existed since at least 3.0.0

.........|
.........|
.........|
.........|
...*..O..|
.........|
.........|
---------+

:8,-

.........|
.........|
.........|
..b......|
...*a.O..|
.........|
.........|
---------+

>antisuji(*);
>antisuji(a);
>antisuji(b);


Pattern Temp7a
# Don't make a one space jump along the edge when there is room for a
# two space jump.
# existed since at least 3.0.0
# FIXME: consider using replace instead of antisuji here?

......
......
..*.O.
......
......
------

:8,-

>antisuji(*);


Pattern Temp7b
# Usually stupid
# existed since at least 3.1.20

X...xxx
XXO.xxx
OX*....
.......
-------

:8,-

G...abc
GGO.def
OG*....
.......
-------

;!weak(G) && x_alive_somewhere(a,b,c,d,e,f)

>antisuji(*);


Pattern Temp8
# existed since at least 3.1.20

.....o         Don't crosscut
.*X.Oo
.XO..o
.....o
......
------

:8,-,shape(-10)


Pattern Temp9
# gf New pattern. (3.3.6)
# ab Modified: ok after approach move (3.7.1)

|............
|............
|............  don't play halfways between hoshi
|...O.....O..
|......*.....
|............
|............
+------------

:8,-

|............
|............
|............
|...O..a..O..
|......*.....
|............
|............
+------------

>antisuji(*);
>antisuji(a);


# END OF FILE