patterns/owl_vital_apats.db

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# 2008 and 2009 by the Free Software Foundation.                    #
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# 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                                             #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
#  The Owl urgent offensive pattern database. These are patterns
#  which are always matched. The patterns in owl_attackpats.db
#  are not matched if owl_shapes finds that the dragon has two
#  eyes. So the patterns in this database are exceptional ones
#  corresponding to defects in the optical code.
#
#  Further documentation may be found in the Texinfo documentation.
#
#  First there is a pattern title of the form: Pattern [string]. The
#  string is used for identifying the pattern while tuning or debugging.
#
#  Then a block of the following characters representing the pattern
#  itself.
#
#  ?     : don't care
#  .     : empty
#  X     : your piece,
#  O     : my piece,
#  x     : your piece or empty
#  o     : my piece or empty
#  *     : my next move
#  !     : your defense move against * (if different)
#  -, |  : edge of board
#  +     : corner of board
#
#  If a pattern must not match at the edge of the board,
#  an extra row of ?'s in the pattern may be added. (This
#  will not add to the time taken to check the pattern.)
#
#################
#
#  In the second field (classification) the following pattern attributes
#  are possible. Friendly stones are 'O', opponent stones are 'X'.
#
# s  :  "Sacrifice" pattern. Omit the usual check that an O stone here
#       cannot be capture.
#
# n  :  In addition to usual check that an O stone here cannot be
#       captured, check also that an X move cannot be captured.
#


attribute_map value_only

goal_elements Xx
callback_data !


Pattern VA1

?x??        threaten two eyes simultaneously
X.X?
.X*O
X.X?

:8,-,value(75)

?x??
A.d?
cX*a
XbX?

; lib(a)>2 && owl_topological_eye(b,A)==2 && owl_topological_eye(c,A)==2 && oplay_attack(*,d)


Pattern VA2

|XXO?       remaining ko potential
|..XO
|*X.X
|..XX
+----

:8,s,value(45)

|AAO?
|..XO
|*X.B
|..BB
+----

;lib(A)==2 && lib(B)==2


Pattern VA3

|XX???      may still be possible to kill through bent four in the corner
|OXx?O
|O.XX*
|.....
+-----

:8,-,value(45)


Pattern VA4

|XX??       may still be possible to kill through bent four in the corner
|OXx?
|O.XX
|.*.X
+----

:8,s,value(45)


Pattern VA5

|X??        take ko for possible nakade
|*X?
|XOx
|Oox
+---

:8,s,value(45)


Pattern VA6
# Workaround for mistake related to false margins.

XXXO?
O.OX*
-----

:8,s,value(45)

XXXO?
a.OX*
-----

;lib(a)==2


Pattern VA7

|XXx        bent four in the corner
|O.X
|OXx
|*OX
+---

:8,s,value(45)


Pattern VA8

*Xx
X.X
XXO

:8,s,value(45)

*Xx
A.X
AAO

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


Pattern VA9
# nn Modified constraint (3.3.14)

X*           atari inside eyespace

:-,s,value(45)

A*

;lib(A)==2 && olib(*)>1 && owl_big_eyespace(*)
;&& (owl_eye_size(*) <= 8 || !oplay_attack(*,*))


Pattern VA10

X*           atari inside eyespace with ko

:-,s,value(35)

A*

;lib(A)==2 && olib(*)==1 && owl_big_eyespace(*) && oplay_attack(*,*)!=WIN


Pattern VA11

?XX???       chance to get nakade
XOOXXx
!OX*.x
------

:8,s,value(65)

?XX???
XaaXXx
.aX*.x
------

;attack(a) && !defend(a)


Pattern VA12

|xx??
|.X??         try to kill with bent four in the corner
|OXXx
|X*.x
+----

:8,s,value(75)


Pattern VA13
# This is almost identical to attack pattern A1330. It is needed in
# both places.

|XX?        take ko to maybe kill
|*XX
|XOX
|O!O
+---

:8,s,value(85)

|AA?
|*AA
|XOA
|OaO
+---

;lib(A)<=3 && oplay_attack(a,a)


# nn Removal candidate (3.3.14)
#   Success rate in regressions : 0% (0/131)

Pattern VA14

?OX         force X to defend inside own eyespace
OX!
*XO
---

:8,-,value(35)

?bX
ODa
*Dc
---

;lib(b)>1 && lib(c)>1 && owl_eyespace(a) && !attack(D)


Pattern VA15

X.?         sacrifice to destroy eye
X*X
OX.

:8,s,value(45)

Ac?
A*X
bXd

;lib(A) == 2 && lib(b) > 1 && !oplay_attack(*,c,d,d)


Pattern VA16

----
.X.X        play safely inside eyespace to falsify eye
.*Xx
X..?

:8,-,value(46)

----
.X.X
.*Xx
X..?

;owl_eyespace(*)


Pattern VA17

xXXOo         exploit shortage of liberties
!O*XO
.X.Xo

:8,s,value(35)

xXXOo
aO*XO
.X.Xo

; oplay_attack(*,a,a)


Pattern VA18

XX!O       throw in to kill an eye
.*X?
XXO?

:8,-,value(35)

XXaO
.*X?
XXO?

; oplay_attack(*,a,a)


Pattern VA19
# gf New pattern. (3.1.11)

OX.x       peep at edge
X.*.
XX..
----

:8,s,value(75)

OX.x
A.*.
AA..
----

;lib(A)==2 && owl_big_eyespace(*)


Pattern VA20
# tm New pattern. (3.1.13)
# see trevor:450

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

:-,-,value(75)

?X?
XaX
*C?
XbX
?X?

; owl_topological_eye(a,C) == 2
; && owl_topological_eye(b,C) == 2


Pattern VA21
# gf New pattern. (3.1.14)
# gf Revised pattern. (3.1.17)

XO?       bogus eyespace
.*X
...
---

:8,-,value(75)

XO?
.*X
.a.
---

;owl_big_eyespace(a)


Pattern VA22
# gf New pattern. (3.1.14)

x.O       bogus eyespace
.*X
...
---

:8,-,value(75)

xaO
.*B
...
---

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


Pattern VA23
# gf New pattern. (3.1.14)

??O?      bogus eyespace
x.*X
....
....
----

:8,-,value(75)

??O?
xc*X
.ba.
....
----

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


Pattern VA24
# gf New pattern. (3.1.14)
# gf Revise constraint to update for changed olib behaviour. (3.7.8)

X*           capture inside eyespace, not ko

:-,-,value(76)

A*

;lib(A)==1 && owl_eyespace(*) && olib(*) > 1


Pattern VA25
# tm New pattern. (3.1.15)  (see cho1:161)

?OO|       special corner shape.
*X.|
XOX|
XO.|
---+

:8,-,value(76)


Pattern VA26
# gf New pattern. (3.1.15)

??XX?       making nakade is only chance to kill, unless we can capture
?XO!X       some of the wall
X*XOX
X.OX?
?XX??

:8,s,value(70)


Pattern VA26b
# gf New pattern. (3.1.15)
# This pattern is entirely bogus. VA25 gives the correct attack point
# but currently we also need this pattern to get a second match, which
# is necessary to offset the fact that X is thought to have three
# eyes.

??XX?       making nakade is only chance to kill, unless we can capture
?XO.X       some of the wall
X.XOX
X*OX?
?XX??

:8,s,value(0)


Pattern VA27
# gf New pattern. (3.1.15)

XX??        not two certain eyes
.*xX
OXOx
----

:8,s,value(45)

XX??
.*AX
OXOB
----

;x_somewhere(A,B)


Pattern VA28
# gf New pattern. (3.1.15)

XX??        not two certain eyes
.OxX
*XOx
----

:8,s,value(45)

XX??
.OAX
*XOB
----

;x_somewhere(A,B)


Pattern VA29
# gf New pattern. (3.1.15)

|XXX?        not two certain eyes
|!O.X
|OX*x
+----

:8,s,value(45)


Pattern VA30
# gf New pattern. (3.1.15)

?XX!         atari to destroy eye
X.*X
?XX?

:8,s,value(45)

?XXb
Xa*X
?CC?

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


Pattern VA31
# tm New pattern (3.1.15)  (see maeda0:60)
# gf Added constraint. (3.5.5)

?O.|
OX.|
X.X|
X!*|
??.|

:8,s,value(76)

?Oa|
OXb|
X.X|
X!*|
??.|

;!oplay_attack(a,?,b,a)


Pattern VA32
# tm New pattern (3.1.15)  (see maeda0:60)
# gf Added constraint. (3.5.5)

?O*|
OX!|
X.X|
XXO|

:8,s,value(76)

?O*|
OXb|
X.X|
XXa|

;lib(a)>1 || !oplay_attack(*,?,b,*)==WIN


Pattern VA33
# tm New pattern (3.1.15)

?X|
XO|
!O|
*X|

:8,-,value(76)


Pattern VA34
# tm New pattern (3.1.15)
#   See also VA27

?X?
XOX
!OX
*XO

:8,-,value(76)

?X?
XOX
.OX
*XA

; oplay_defend_both(*,A,*)


Pattern VA35

?XX|
X..|
X*X|
XO.|
---+

:8,s,value(45)

?XX|
XA.|
X*X|
XO.|
---+

; xlib(A)==2


Pattern VA36

?XXX|    cut black up
X.OX|
XX*O|
?OX.|
??XX|

:8,s,value(45)


Pattern VA37
# tm New Pattern (3.1.15)

?xXO?
?X.XO
O.X!*
-----

:8,-,value(45)

?xXO?
?X.XO
A.X.*
-----

;lib(A) > 2


Pattern VA38
# gf New pattern. (3.1.15)
# See trevora:25

??O
x!.           capture a string at the edge of an eyespace
.*X
...
---

:8,-,value(80)

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

;owl_big_eyespace(*) && !oplay_defend(*,A)


Pattern VA39
# tm New Pattern (3.1.16)
# gf Revised constraint. (3.5.4)

XO*|      atari to kill eye
!XX|
XOO|

:8,s,value(95)

XO*|
aXX|
Xbb|

;owl_eyespace(a) && olib(*)>1 && lib(b)>1


Pattern VA40
# tm New Pattern (3.1.16) (see trevora:550)

OXx       Threaten snapback inside eyespace.
X..
X.*
X..

:8,s,value(95)

OXx
X..
A.*
X..

; lib(A) == 3


Pattern VA41
# tm New Pattern (3.1.16)

XXO
.*X
!.X

:8,s,value(95)

XBO
.*A
..X

;lib(A) ==2 || lib(B) == 2


Pattern VA42
# tm New Pattern (3.1.16)

X*X     double attack on safe eye
.X.
X.X
OXX

:8,-,value(75)

b*c
.X.
X.X
DXX

;!attack(D) && oplay_attack(*,b) && oplay_attack(*,c)


Pattern VA43
# tm New Pattern (3.1.17)

XXX.
.O*.
----

:8,s,value(50)

XXXb
.O*a
----

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


Pattern VA44
# tm New Pattern (3.1.17)
# gf Fixed symmetry. (3.3.6)
# nn Modified constraint (3.3.14)
# gf Revised constraint. (3.5.3)

XoX
o*o

:|,s,value(57)

XbX
a*c

; owl_proper_eye(*)
; && (owl_proper_eye(a) + owl_proper_eye(b) + owl_proper_eye(c) > 2)
; && safe_xmove(*)
; && ((owl_eye_size(*) <= 8 && owl_maxeye(*)>1) || !oplay_attack(*,*))


Pattern VA45
# tm New Pattern (3.1.17)

X*     cut to create false eye
OX
--

:8,-,value(75)

X*
OX
--

; !ko(*)


Pattern VA46
# tm New Pattern (3.1.17)
#   see trevor:650

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

:8,-,value(75)

?X???
CbX??
?XAO*

; xlib(A) == 1
; && olib(A) == 1
; && owl_topological_eye(b,C) < 4 && owl_topological_eye(b,C) > 0


Pattern VA47a
# tm Moved from owl_attackpats (3.1.17)
#   was A1107
# gf Split with respect to ko. (3.7.9)

O*          defend the surrounding chain
XO

:/,-,value(95)

a*
Xb

;vital_chain(a) && vital_chain(b) && !ko(*) && !xplay_defend_both(*,a,b)


Pattern VA47b
# tm Moved from owl_attackpats (3.1.17)
#   was A1107
# gf Split with respect to ko. (3.7.9)

O*          defend the surrounding chain
XO

:/,-,value(65)

a*
Xb

;vital_chain(a) && vital_chain(b) && ko(*) && !xplay_defend_both(*,a,b)


Pattern VA48
# tm New Pattern (3.1.18)

+----
|.*..
|XX!O

:8,s,value(75)


Pattern VA49
# tm New Pattern (3.1.18) (see trevor:430)
# FIXME: This is non-sense if the ataried stone has neighbours
# in atari (see trevorb:360)

X*    atari outside eyespace
oX

:8,-,value(35)

X*
AB

; lib(B) <= 2 && owl_eyespace(A)


Pattern VA50
# pp New pattern (3.3.10)

|xx??
|Ox??        try to kill with bent four in the corner
|OXXx
|X*.x
+----

:8,s,value(45)


Pattern VA51
# pp New pattern (3.3.12)

|*Oo         start an unfavourable ko
|.XO
|X.X
|.Xx
|.O.
+---

:8,-,value(35)


Pattern VA52a
# gf New pattern. (3.3.20)

|*Oo         make X short of liberties
|.XO
|X.X
|..X
|OXX
|.X?
+---

:8,-,value(65)


Pattern VA52b
# gf New pattern. (3.3.20)

|*Oo
|OXO         make X short of liberties
|.XO
|X.X
|..X
|OXX
|.X?
+---

:8,-,value(65)


Pattern VA53
# gf New pattern. (3.3.20)
# See ld_owl:68.

|XXX   nakade if X cannot squeeze
|O.X
|XOX
|*OX
+---

:8,s,value(75)

|AAA
|O.A
|XOA
|*OA
+---

;lib(A)==2


Pattern VA54
# mh New pattern (3.5.4)
# See ld_owl:413/414

X.X    play atari inside one eye to destroy the other eye
*XO

:8,s,value(45)

XaX
*BO

;lib(B)==2 && olib(*)>=2 && owl_proper_eye(*) && owl_maxeye(a)>0


Pattern VA55
# gf New pattern. (3.7.9)
# See ld_owl:406.

?X?    force opponent to fill one eye
X.X
.XO
*.?
---

:8,s,value(45)

?X?
X.X
bXO
*a?
---

;xlib(a)==3 && oplay_lib(*,a,b,b)>1


Pattern VA56
# gf New pattern. (3.7.9)
# See ld_owl:326.

xXOo    destroy eye
X.XO
OX.*
----

:8,-,value(45)

xXOo
XaXO
OX.*
----

;owl_mineye(a)==1


# END OF FILE