patterns/conn.db

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# 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.                                            #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# Database of connection patterns.
#
#  ? - don't care
#  . - empty
#  X - opposite color of O
#  O - color of dragon looking for connection
#  x - X or empty
#  o - O or empty
#  * - cutting point in the O formation, an X move here must be
#      tactically safe
#  ! - inhibit connection, eye space points for O are turned marginal
#
###################################
#
# Classification
#
# The connection database contains patterns of three different classes,
# which also are matched separately.
#
#  B - Indicate cutting points and inhibit connections.
#  C - Amalgamate worms into dragons.
#
# Additionally there are a few acceptance modifiers.
#
#  s - Accept even if the pattern includes tactically unsafe strings
#
###################################
#
# Organisation
#
# The connection database is organized into a number of different
# categories and ordered so that more specific patterns are matched
# before more general ones, since evaluating the constraints of the
# latter usually is expensive.
#
#  EB    - Edge B patterns
#  CB    - Center B patterns
#  EC    - Edge C patterns
#  CC    - Center C patterns
#  Lunch - patterns that invalidate lunches, matched with I patterns
#
###################################


attribute_map none

goal_elements none
# callback_data is dependent on pattern class in this database


########################
#
# B patterns on the edge
#
########################

callback_data X!


##########################
#
# B patterns in the center
#
##########################

callback_data X!


Pattern CB1b

?O.          fragile double connection
X*O
?O.

:8,B

?b.
X*O
?a.

;!xplay_connect(*,a,b)


Pattern CB2b

?O.
?..          fragile double connection
X*O
?O.

:8,B

?b.
?..
X*O
?a.

;!xplay_connect(*,a,b)


Pattern CB3b

O!O
.*X
.O?

:8,B

O!a
.*X
.b?

;!xplay_connect(*,a,b)


Pattern CB3c

O!O
.*.
.OX

:8,B

c!a
.*.
.bX

;!oplay_disconnect(a,c)
;&& !oplay_disconnect(c,b)
;&& !xplay_connect(*,a,b)


Pattern CB7
# This pattern is used to find potential cutting stones as defined by
# the field cutstone2 in the worm data. The helper returns 0 so the
# pattern doesn't fire as a B pattern.

XO
O*

:\,B,cutstone2_helper

AO
O*

;attack(A)


Pattern CB11b

?OX?
O!OX
?*!O
??O?

:8,B

?bX?
O!OX
?*!a
??O?

;!xplay_connect(*,a,b)


Pattern CB15b
# tm New Pattern (3.1.23)  (see global:17, )
#   careful not to break trevord:730
# FIXME:  Need to use amalgamate_most_valuable helper.
# xplay_disconnect helper also might be useful here.

?*?   save cutting stone.
OXO
!O!

:8,B

?*?
aXb
!O!

;!xplay_connect(*,a,b)


Pattern CB16
# gf Revised constraint. (3.3.13)

?O
x*          fragile double connection
XO
O!

:8,B

?a
x*
XO
b!

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


Pattern CB17

O!O
!*?        fragile double connection
O??

:\,B

O!a
!*?
b??

;!xplay_connect(*,a,b)


Pattern CB18

?X?
X.X        workaround for ko contingent connection
OXO
?O*

:8,B

?X?
XbX
OAd
?c*

;xplay_attack(*,A)<WIN && !xplay_connect(*,?,b,c,d)


########################
#
# C patterns on the edge
#
########################

# Static connections need almost everything
callback_data .Oxo,!


Pattern EC1

??oo??
?....?
oO..Oo
o....o
o....o
------

:|,C


Pattern EC1b

??....??
o.O..O.o
o......o
o......o
--------

:|,C


Pattern EC3a

o...o
oO.Oo
o...o
o...o
o...o
-----

:8,C

o...o
oO.Oo
o...o
oa..o
o...o
-----

;omoyo(a)


##########################
#
# C patterns in the center
#
##############################################
#
# CC1xx - patterns without reading constraints
#
##############################################

# Static connections need almost everything
callback_data .Oxo,!


Pattern CC101

.O
O.

:X,C

aO
Ob

;!xcut(a) && !xcut(b)


Pattern CC103

?oooo?
o....o
oO..Oo
o....o
?oooo?

:+,C


Pattern CC104

?ooo??
o...oo
oO...o
o...Oo
oo...o
??ooo?

:8,C


Pattern CC105

?ooo?
.....
.O.O.
.....
?ooo?

:+,C


Pattern CC106

.O.O.
o...o
o...o
o.O.o

:8,C


Pattern CC107

.O.O.
o...o
o...o
.O.O.

:8,C


Pattern CC108

O.O
...
...
.O.

:|,C

OaO
bcd
efg
.O.

;omoyo(a) && oarea(c) && oarea(f)
;&& ((omoyo(b) + omoyo(c) + omoyo(d) + omoyo(e) + omoyo(f) +omoyo(g)) >= 3)


Pattern CC109
# gf Revised constraint. (3.3.3)

O.oo
..oo
..oo
.Ooo

:8,C

c.oo
.aoo
.boo
.doo

;omoyo(a) && omoyo(b) && lib(c)>=4 && lib(d)>=4


##########################################################
#
# CC2xx - patterns with reasonably inexpensive constraints
#
##########################################################

#############################################
#
# CC3xx - patterns with expensive constraints
#
#############################################
#
# CC30x - one space jump connections
#
####################################

###########################
#
# CC31x - keima connections
#
###########################

####################################
#
# CC32x - two space jump connections
#
####################################

############################
#
# CC33x - ogeima connections
#
############################

####################################################################
#
# CC4xx -  fragile double connections
#
# FIXME: These shouldn't be matched until all other amalgamation has
# been completed.
#
####################################################################

Pattern CC401
# Do amalgamate one of the two possible connections. We guess that
# the larger of the two dragons is the one we most want to keep in
# case of a cut.

?O.          fragile double connection
X.O
?O.

:8,-

?d.
Xac
?b.

;xcut(a)

>amalgamate_most_valuable_helper(b,c,d);


Pattern CC402
# Do amalgamate one of the two possible connections. We guess that
# the larger of the two dragons is the one we most want to keep in
# case of a cut.

?O.
?..          fragile double connection
X.O
?O.

:8,-

?gd
?bc
Xaf
?e.

;xcut(a)

>if (!xplay_attack_either(b,c,d,b,d) || !xplay_attack_either(c,b,a,c,a))
>  amalgamate(e,f);
>else
>  amalgamate_most_valuable_helper(e,f,g);


####################################################################
#
# CC5xx - experimental connection patterns
#
####################################################################
#
# Note about patterns CC501, CC502, CC502b, CC511
#
# In theory, these patterns go against the connection policy that the
# involved strings must be tactically stable (not capturable) and
# consequently, they should not be needed at all. In practice though,
# problems arise with the optics/owl analysis when such strings aren't
# amalgamated. An example (see owl:50)
#
# +------
# |...X.O
# |XXX.XO
# |.OOXXO
# |O.OOOO
#
# In the absence of the mentioned patterns, the topmost X stone would
# NOT be amalgamated with the others, because all attempts at
# defending these kosumi connections result in a tactical capture of
# the whole string, thus a successful cut.
#
# As a consequence, the owl code would be run against separate targets,
# and in the above case, it would even fail to find a way to kill the
# topmost X stone (the lack of context is then responsible for the
# optics/owl code not being able to return vital points)
#
####################################################################


Pattern CC501
# Connect even if stones not tactically safe.

xO
O.

:\,sC

xO
Oc

;x_suicide(c)


Pattern CC502
# Connect even if stones not tactically safe.

XO
O.

:\,sC

Xb
ac

;lib(a)>1 && lib(b)>1 && !xcut(c) && xlib(c)==1 && xplay_attack(c,c)==WIN


Pattern CC502b
# Connect even if stones not tactically safe.

.O
O.

:\,sC

db
ac

;lib(a)>1 && lib(b)>1 && !xcut(c) && !xcut(d)
;&& xlib(c)==1 && xplay_attack(c,c)


Pattern CC503

O
.
O

:+,C

c
a
b

;!xcut(a) && !disconnect_helper(b,c)


Pattern CC504

XO
O.

:\,C

Xb
ca

;!xcut(a) && !disconnect_helper(b,c)


Pattern CC505

XO
OX

:X,C

Bc
dA

;((attack(A) && !distrust_tactics_helper(A))
; || (attack(B) && !distrust_tactics_helper(B)))
;&& !disconnect_helper(c,d)


Pattern CC506

O
.
.
O

:+,C

c
a
b
d

;!xcut(a) && !xcut(b) && !disconnect_helper(c,d)


Pattern CC506b

O.
Xo
..
O.

:8,C

c.
Eo
ab
d.

;!xcut(a) && !xcut(b) && lib(E)<=2 && !disconnect_helper(c,d)


Pattern CC507

Ox
..
xO

:O,C

cx
ab
xd

;!xcut(a) && !xcut(b) && !disconnect_helper(c,d)


Pattern CC508

O?
.X
xO

:8,C

b?
aX
xc

;!xcut(a) && !disconnect_helper(b,c)


Pattern CC509

Ox
..
..
xO

:O,C

ex
ab
cd
xf

;!xcut(a) && !xcut(b) && !xcut(c) && !xcut(d) && !disconnect_helper(e,f)


Pattern CC511
# Connect even if stones not tactically safe.

.O
O.

:\,sC

db
ac

;attack(a) && attack(b) && !xcut(c) && !xcut(d)


# END OF FILE