[sgk-go] / regression / seki.tst

# The theme of this test suite is how to play inside an already living
# group to turn potential territory into a seki. A typical example
# would be this corner group
# 
# |OOOOOO
# |XXXXXO
# |..a.XO
# |....XO
# +------
# 
# where white can make seki in sente by playing at 'a'. There are also
# numerous test cases to check the followup moves to get a seki. In
# many cases one or both players have the option to make ko for life
# and death of the entire corner (whereby black would get territory
# points if winning). Is is generally assumed in this test suite that
# white tries to achieve ko while black tries to avoid it, since the
# ko in most cases is favorable to white.

loadsgf games/seki04.sgf
1 reg_genmove white
#? [B2|B1|A2]
# B2 also secures life but leaves a much bigger ko threat behind.
2 reg_genmove black
#? [A2|B1]

play white B2
# Tenuki lets white make ko with A1
3 reg_genmove black
#? [B1|A2]

play black B1
4 reg_genmove white
#? [A2]

undo
undo
play white B1
5 reg_genmove black
#? [A2]
6 reg_genmove white
#? [A2]

play black A2
7 reg_genmove white
#? [B2]*

undo
# White kills through bent four in the corner.
play black B2
8 reg_genmove white
#? [A2]


loadsgf games/seki05.sgf
# C2 gives a sente seki, while B1 gives a gote seki. Other moves fail.
101 reg_genmove white
#? [C2]
102 reg_genmove black
#? [C2|C1|B2|B1]

play white C2
# Only B1 and A2 (oddly enough) avoids giving white a ko option.
103 reg_genmove black
#? [B1|A2]*

play black B1
104 reg_genmove white
#? [B2]

play white B2
105 reg_genmove black
#? [C1]

play black C1
106 reg_genmove white
#? [A2]

play white A2
107 reg_genmove black
#? [D1]

undo
undo
play black A2
108 reg_genmove white
#? [C1]

undo
undo
undo
play black B2
109 reg_genmove white
#? [B1]

undo
play black C1
110 reg_genmove white
#? [B1]

undo
undo
play white B1
111 reg_genmove black
#? [C2]*

undo
play white C1
112 reg_genmove black
#? [B1]*


loadsgf games/seki06.sgf
201 reg_genmove white
#? [B2]
202 reg_genmove black
#? [B2]

# Both A2 and B1 lead to seki. Strictly speaking A2 is a better move
# since it leaves black the option to take sente and let white make a
# thousand-year ko. For now we accept both.
play white B2
203 reg_genmove black
#? [A2|B1]

play black A2
204 reg_genmove white
#? [B1]

# White gets a thousand-year ko if black plays tenuki.
play white B1
205 reg_genmove black
#? [C1|C2]

# A1 makes a clean seki with no ko aji.
undo
play white C1
206 reg_genmove black
#? [A1]

undo
undo
play black B1
207 reg_genmove white
#? [A2]

play white A2
208 reg_genmove black
#? [C2]
209 reg_genmove white
#? [A3]

undo
undo
undo
play white B1
210 reg_genmove black
#? [B2]


loadsgf games/seki07.sgf
301 reg_genmove white
#? [B2]
302 reg_genmove black
#? [B2]

play white B2
303 reg_genmove black
#? [A2|C1|C2]

play black A2
304 reg_genmove white
#? [C1]

# Black can start ko with B1 if desperate.
play white C1
305 reg_genmove black
#? [C2]

play black C2
306 reg_genmove white
#? [B1]

# Now black can live with territory.
undo
undo
play white B1
307 reg_genmove black
#? [C1]

undo
undo
play black C1
308 reg_genmove white
#? [A2]

# Tenuki is okay. What remains is a double-sided ko threat (0 points
# double sente).
play white A2
309 reg_genmove black
#? [B1|C2|C9]

play black B1
310 reg_genmove white
#? [C2]

undo
play black C2
311 reg_genmove white
#? [B1]

# A2 also makes seki, but costs a prisoner.
undo
undo
undo
play black C2
312 reg_genmove white
#? [B1|C1]

play white B1
313 reg_genmove black
#? [C1|A2]

play black C1
314 reg_genmove white
#? [A2]

undo
play black A2
315 reg_genmove white
#? [C1]

undo
undo
play white C1
316 reg_genmove black
#? [A2]


loadsgf games/seki08.sgf
401 reg_genmove white
#? [B1]
# Most moves secure territory but C1 and C2 are most natural. We also
# allow B1.
402 reg_genmove black
#? [C1|C2|B1]

# C1 and C2 both secure seki in sente, but C1 is one prisoner better.
# B2 leaves white the option to make ko.
play white B1
403 reg_genmove black
#? [C1|C2]*

play black C1
404 reg_genmove white
#? [A2|D1]

play white A2
405 reg_genmove black
#? [C2]

play black C2
406 reg_genmove white
#? [D1|E1]

undo
undo
play white D1
407 reg_genmove black
#? [C2|E1]

play black C2
408 reg_genmove white
#? [A2]

undo
play black E1
409 reg_genmove white
#? [A2]

play white A2
410 reg_genmove black
#? [C2]

undo
undo
undo
undo

# D1 and A2 also give seki but are one point worse.
play black C2
411 reg_genmove white
#? [C1]

# D1 and A2 are miai to get seki. Black can also opt for a difficult
# ko by playing B2, but this is usually not a good idea. Tenuki
# suffices for seki and leaves a big mutual ko threat.
play white C1
412 reg_genmove black
#? [D1|A2|C9]

play black D1
413 reg_genmove white
#? [A2]

loadsgf games/seki09.sgf
501 reg_genmove white
#? [B1]*
502 reg_genmove black
#? [C1]*

play white B1
503 reg_genmove black
#? [C1]

play black C1
504 reg_genmove white
#? [A2]

loadsgf games/seki10.sgf
601 reg_genmove white
#? [B1]
602 reg_genmove black
#? [C1|B1]

# B2 gives a hopeless ko.
play white B1
603 reg_genmove black
#? [C1]

play black C1
604 reg_genmove white
#? [A2]


loadsgf games/seki11.sgf
701 reg_genmove white
#? [C1]
702 reg_genmove black
#? [C1|B1|B2]

play white C1
703 reg_genmove black
#? [B2]

play black B2
704 reg_genmove white
#? [B1]


loadsgf games/seki12.sgf
801 reg_genmove white
#? [B2]
802 reg_genmove black
#? [B2]

# C2 is the best way to make seki since it leaves ko aji in black's
# favor unless white accepts gote.
play white B2
803 reg_genmove black
#? [C2]

# B1 also makes seki but white definitely ends in gote.
play black C2
804 reg_genmove white
#? [C1]

# After A2 black has the option to start ko with B1, unless white
# takes gote and fills at B1. Sooner or later that may be necessary.
play white C1
805 reg_genmove black
#? [A2]

undo
play white B1
# A2 is one point bigger than C1 regardless of scoring method.
806 reg_genmove black
#? [A2|C1]

play black C1
# A3 is one point bigger than A2 under japanese scoring and a half
# point bigger under chinese scoring.
807 reg_genmove white
#? [A3|A2]

undo
undo
undo

# B1 and A2 give gote seki.
play black C1
808 reg_genmove white
#? [C2]

play white C2
809 reg_genmove black
#? [B1]

# A2 is gote seki and may occasionally be better than allowing black
# to initiate a ko.
play black B1
810 reg_genmove white
#? [A3]

# A1 secures seki, removing white's ko aji.
play white A3
811 reg_genmove black
#? [A1]


loadsgf games/seki13.sgf
901 reg_genmove white
#? [B2]
902 reg_genmove black
#? [B2]

# Black probably have more moves to make seki in sente but C2 looks most
# natural. C1 is also good enough. B1 suffices to make sente seki as well
# but loses one point compared to C2 or C1.
play white B2
903 reg_genmove black
#? [C2|C1]*

play black C2
904 reg_genmove white
#? [B3]

# B1 gives ko or seki in gote. Tenuki also leaves a seki but compared
# to C1 the latter is 1 point double sente.
play white B3
905 reg_genmove black
#? [C1]*

play black C1
906 reg_genmove white
#? [B1]

# Black can play tenuki and still have seki but since A3 is one point
# double sente there is no reason to wait.
play white B1
907 reg_genmove black
#? [A3]*

play black A3
908 reg_genmove white
#? [A2]

# 1 point double sente, just like 907.
undo
909 reg_genmove white
#? [A3]*

play white A3
910 reg_genmove black
#? [A1|A2]

# One point to pick up the A1 stone under Japanese rules.
play black A1
play black C9
911 reg_genmove white
#? [A2]

# After white C1 black can make ko with A2 or seki in gote with D1.
undo
undo
undo
undo
undo
play black B1
912 reg_genmove white
#? [C1]

# White C1 was a mistake. Black makes life with territory at B3.
undo
undo
play white C1
913 reg_genmove black
#? [B3]


# Black should play B2. A2 and B1 leave an unnecessary ko threat.
loadsgf games/seki14.sgf
1001 reg_genmove white
#? [B2]
1002 reg_genmove black
#? [B2]


loadsgf games/seki15.sgf
1101 reg_genmove white
#? [D1]*
1102 reg_genmove black
#? [C1|C2|D2]*

play white D1
1103 reg_genmove black
#? [E2]

play black E2
1104 reg_genmove white
#? [B1]*

play white B1
1105 reg_genmove black
#? [C2]

play black C2
1106 reg_genmove white
#? [C1]


loadsgf games/seki16.sgf
1201 reg_genmove white
#? [B2]
1202 reg_genmove black
#? [B2]

# Black can make seki in sente with most moves but B1 and A2 lose one
# point. Tenuki let's white kill with ko.
play white B2
1203 reg_genmove black
#? [C2|B3|C1|A3]

# B3, A2, and A1 fail to make seki.
play black C2
1204 reg_genmove white
#? [B1|C1|A3]

# A3, B3, and A2 all make seki, but B3 and A2 lose a point.
play white C1
1205 reg_genmove black
#? [A3]*

play black A3
1206 reg_genmove white
#? [B3|A2|B1]

play white B3
1207 reg_genmove black
#? [A2]

play black A2
1208 reg_genmove white
#? [B1]

undo
undo
play white A2
1209 reg_genmove black
#? [B3]*

play black B3
1210 reg_genmove white
#? [B1]

# A3 gains a point compared to A2. B1 is two points worse.
undo
undo
undo
play black B3
1211 reg_genmove white
#? [A3]

# A3 gains a point compared to B3. B1 is two points worse.
undo
play black A2
1212 reg_genmove white
#? [A3]

play white A3
1213 reg_genmove black
#? [B3]

play black B3
1214 reg_genmove white
#? [A1]

undo
undo
undo
undo

# Tenuki leaves seki but loses a point.
play white B1
1215 reg_genmove black
#? [C1|A3|B3|A2|C9]

# B3 and A2 both fail.
play black C1
1216 reg_genmove white
#? [A3]

# A2 also gives seki but loses a point, as does tenuki.
play white A3
1217 reg_genmove black
#? [B3]*

undo
undo
play black A3
1218 reg_genmove white
#? [C1]

# Tenuki is fine.
play white C1
1219 reg_genmove black
#? [B3|A2|C9]

undo
undo
play black B3
1220 reg_genmove white
#? [A2|A3]*

undo
play black A2
1221 reg_genmove black
#? [B3|A3]

# B1 and B3 lose a point.
undo
undo
play white A3
1222 reg_genmove black
#? [C1]*

play black C1
1223 reg_genmove white
#? [B1]

# Only A3 works. If black gets both C1 and A3, white can't do anything
# with two stones (in addition to B2).
undo
undo
undo
play black C1
1224 reg_genmove white
#? [A3]

play white A3
1225 reg_genmove black
#? [B1|C2|B3]

play black B1
1226 reg_genmove white
#? [C2]

play white C2
1227 reg_genmove black
#? [B3]*

# C1 is one point better than C2 and A3.
undo
undo
undo
undo
play black B1
1228 reg_genmove white
#? [C1]*

loadsgf games/FSGCBot-dr.sgf 234
2010 reg_genmove white
#? [A19|B17]

loadsgf games/seki_nakade1.sgf
2020 dragon_status D9
#? [alive]

loadsgf games/seki_nakade2.sgf
2030 dragon_status F9
#? [critical H9 H9]*

play white H9
play white H7
play white G7
play white G9

2050 dragon_status G8
#? [alive]
Commit	Line	Data
7eeb782e AT	1	# The theme of this test suite is how to play inside an already living
	2	# group to turn potential territory into a seki. A typical example
	3	# would be this corner group
	4	#
	5	# \|OOOOOO
	6	# \|XXXXXO
	7	# \|..a.XO
	8	# \|....XO
	9	# +------
	10	#
	11	# where white can make seki in sente by playing at 'a'. There are also
	12	# numerous test cases to check the followup moves to get a seki. In
	13	# many cases one or both players have the option to make ko for life
	14	# and death of the entire corner (whereby black would get territory
	15	# points if winning). Is is generally assumed in this test suite that
	16	# white tries to achieve ko while black tries to avoid it, since the
	17	# ko in most cases is favorable to white.
	18
	19	loadsgf games/seki04.sgf
	20	1 reg_genmove white
	21	#? [B2\|B1\|A2]
	22	# B2 also secures life but leaves a much bigger ko threat behind.
	23	2 reg_genmove black
	24	#? [A2\|B1]
	25
	26	play white B2
	27	# Tenuki lets white make ko with A1
	28	3 reg_genmove black
	29	#? [B1\|A2]
	30
	31	play black B1
	32	4 reg_genmove white
	33	#? [A2]
	34
	35	undo
	36	undo
	37	play white B1
	38	5 reg_genmove black
	39	#? [A2]
	40	6 reg_genmove white
	41	#? [A2]
	42
	43	play black A2
	44	7 reg_genmove white
	45	#? [B2]*
	46
	47	undo
	48	# White kills through bent four in the corner.
	49	play black B2
	50	8 reg_genmove white
	51	#? [A2]
	52
	53
	54	loadsgf games/seki05.sgf
	55	# C2 gives a sente seki, while B1 gives a gote seki. Other moves fail.
	56	101 reg_genmove white
	57	#? [C2]
	58	102 reg_genmove black
	59	#? [C2\|C1\|B2\|B1]
	60
	61	play white C2
	62	# Only B1 and A2 (oddly enough) avoids giving white a ko option.
	63	103 reg_genmove black
	64	#? [B1\|A2]*
65
66	play black B1
67	104 reg_genmove white
68	#? [B2]
69
70	play white B2
71	105 reg_genmove black
72	#? [C1]
73
74	play black C1
75	106 reg_genmove white
76	#? [A2]
77
78	play white A2
79	107 reg_genmove black
80	#? [D1]
81
82	undo
83	undo
84	play black A2
85	108 reg_genmove white
86	#? [C1]
87
88	undo
89	undo
90	undo
91	play black B2
92	109 reg_genmove white
93	#? [B1]
94
95	undo
96	play black C1
97	110 reg_genmove white
98	#? [B1]
99
100	undo
101	undo
102	play white B1
103	111 reg_genmove black
104	#? [C2]*
105
106	undo
107	play white C1
108	112 reg_genmove black
109	#? [B1]*
110
111
112	loadsgf games/seki06.sgf
113	201 reg_genmove white
114	#? [B2]
115	202 reg_genmove black
116	#? [B2]
117
118	# Both A2 and B1 lead to seki. Strictly speaking A2 is a better move
119	# since it leaves black the option to take sente and let white make a
120	# thousand-year ko. For now we accept both.
121	play white B2
122	203 reg_genmove black
123	#? [A2\|B1]
124
125	play black A2
126	204 reg_genmove white
127	#? [B1]
128
129	# White gets a thousand-year ko if black plays tenuki.
130	play white B1
131	205 reg_genmove black
132	#? [C1\|C2]
133
134	# A1 makes a clean seki with no ko aji.
135	undo
136	play white C1
137	206 reg_genmove black
138	#? [A1]
139
140	undo
141	undo
142	play black B1
143	207 reg_genmove white
144	#? [A2]
145
146	play white A2
147	208 reg_genmove black
148	#? [C2]
149	209 reg_genmove white
150	#? [A3]
151
152	undo
153	undo
154	undo
155	play white B1
156	210 reg_genmove black
157	#? [B2]
158
159
160	loadsgf games/seki07.sgf
161	301 reg_genmove white
162	#? [B2]
163	302 reg_genmove black
164	#? [B2]
165
166	play white B2
167	303 reg_genmove black
168	#? [A2\|C1\|C2]
169
170	play black A2
171	304 reg_genmove white
172	#? [C1]
173
174	# Black can start ko with B1 if desperate.
175	play white C1
176	305 reg_genmove black
177	#? [C2]
178
179	play black C2
180	306 reg_genmove white
181	#? [B1]
182
183	# Now black can live with territory.
184	undo
185	undo
186	play white B1
187	307 reg_genmove black
188	#? [C1]
189
190	undo
191	undo
192	play black C1
193	308 reg_genmove white
194	#? [A2]
195
196	# Tenuki is okay. What remains is a double-sided ko threat (0 points
197	# double sente).
198	play white A2
199	309 reg_genmove black
200	#? [B1\|C2\|C9]
201
202	play black B1
203	310 reg_genmove white
204	#? [C2]
205
206	undo
207	play black C2
208	311 reg_genmove white
209	#? [B1]
210
211	# A2 also makes seki, but costs a prisoner.
212	undo
213	undo
214	undo
215	play black C2
216	312 reg_genmove white
217	#? [B1\|C1]
218
219	play white B1
220	313 reg_genmove black
221	#? [C1\|A2]
222
223	play black C1
224	314 reg_genmove white
225	#? [A2]
226
227	undo
228	play black A2
229	315 reg_genmove white
230	#? [C1]
231
232	undo
233	undo
234	play white C1
235	316 reg_genmove black
236	#? [A2]
237
238
239	loadsgf games/seki08.sgf
240	401 reg_genmove white
241	#? [B1]
242	# Most moves secure territory but C1 and C2 are most natural. We also
243	# allow B1.
244	402 reg_genmove black
245	#? [C1\|C2\|B1]
246
247	# C1 and C2 both secure seki in sente, but C1 is one prisoner better.
248	# B2 leaves white the option to make ko.
249	play white B1
250	403 reg_genmove black
251	#? [C1\|C2]*
252
253	play black C1
254	404 reg_genmove white
255	#? [A2\|D1]
256
257	play white A2
258	405 reg_genmove black
259	#? [C2]
260
261	play black C2
262	406 reg_genmove white
263	#? [D1\|E1]
264
265	undo
266	undo
267	play white D1
268	407 reg_genmove black
269	#? [C2\|E1]
270
271	play black C2
272	408 reg_genmove white
273	#? [A2]
274
275	undo
276	play black E1
277	409 reg_genmove white
278	#? [A2]
279
280	play white A2
281	410 reg_genmove black
282	#? [C2]
283
284	undo
285	undo
286	undo
287	undo
288
289	# D1 and A2 also give seki but are one point worse.
290	play black C2
291	411 reg_genmove white
292	#? [C1]
293
294	# D1 and A2 are miai to get seki. Black can also opt for a difficult
295	# ko by playing B2, but this is usually not a good idea. Tenuki
296	# suffices for seki and leaves a big mutual ko threat.
297	play white C1
298	412 reg_genmove black
299	#? [D1\|A2\|C9]
300
301	play black D1
302	413 reg_genmove white
303	#? [A2]
304
305	loadsgf games/seki09.sgf
306	501 reg_genmove white
307	#? [B1]*
308	502 reg_genmove black
309	#? [C1]*
310
311	play white B1
312	503 reg_genmove black
313	#? [C1]
314
315	play black C1
316	504 reg_genmove white
317	#? [A2]
318
319	loadsgf games/seki10.sgf
320	601 reg_genmove white
321	#? [B1]
322	602 reg_genmove black
323	#? [C1\|B1]
324
325	# B2 gives a hopeless ko.
326	play white B1
327	603 reg_genmove black
328	#? [C1]
329
330	play black C1
331	604 reg_genmove white
332	#? [A2]
333
334
335	loadsgf games/seki11.sgf
336	701 reg_genmove white
337	#? [C1]
338	702 reg_genmove black
339	#? [C1\|B1\|B2]
340
341	play white C1
342	703 reg_genmove black
343	#? [B2]
344
345	play black B2
346	704 reg_genmove white
347	#? [B1]
348
349
350	loadsgf games/seki12.sgf
351	801 reg_genmove white
352	#? [B2]
353	802 reg_genmove black
354	#? [B2]
355
356	# C2 is the best way to make seki since it leaves ko aji in black's
357	# favor unless white accepts gote.
358	play white B2
359	803 reg_genmove black
360	#? [C2]
361
362	# B1 also makes seki but white definitely ends in gote.
363	play black C2
364	804 reg_genmove white
365	#? [C1]
366
367	# After A2 black has the option to start ko with B1, unless white
368	# takes gote and fills at B1. Sooner or later that may be necessary.
369	play white C1
370	805 reg_genmove black
371	#? [A2]
372
373	undo
374	play white B1
375	# A2 is one point bigger than C1 regardless of scoring method.
376	806 reg_genmove black
377	#? [A2\|C1]
378
379	play black C1
380	# A3 is one point bigger than A2 under japanese scoring and a half
381	# point bigger under chinese scoring.
382	807 reg_genmove white
383	#? [A3\|A2]
384
385	undo
386	undo
387	undo
388
389	# B1 and A2 give gote seki.
390	play black C1
391	808 reg_genmove white
392	#? [C2]
393
394	play white C2
395	809 reg_genmove black
396	#? [B1]
397
398	# A2 is gote seki and may occasionally be better than allowing black
399	# to initiate a ko.
400	play black B1
401	810 reg_genmove white
402	#? [A3]
403
404	# A1 secures seki, removing white's ko aji.
405	play white A3
406	811 reg_genmove black
407	#? [A1]
408
409
410	loadsgf games/seki13.sgf
411	901 reg_genmove white
412	#? [B2]
413	902 reg_genmove black
414	#? [B2]
415
416	# Black probably have more moves to make seki in sente but C2 looks most
417	# natural. C1 is also good enough. B1 suffices to make sente seki as well
418	# but loses one point compared to C2 or C1.
419	play white B2
420	903 reg_genmove black
421	#? [C2\|C1]*
422
423	play black C2
424	904 reg_genmove white
425	#? [B3]
426
427	# B1 gives ko or seki in gote. Tenuki also leaves a seki but compared
428	# to C1 the latter is 1 point double sente.
429	play white B3
430	905 reg_genmove black
431	#? [C1]*
432
433	play black C1
434	906 reg_genmove white
435	#? [B1]
436
437	# Black can play tenuki and still have seki but since A3 is one point
438	# double sente there is no reason to wait.
439	play white B1
440	907 reg_genmove black
441	#? [A3]*
442
443	play black A3
444	908 reg_genmove white
445	#? [A2]
446
447	# 1 point double sente, just like 907.
448	undo
449	909 reg_genmove white
450	#? [A3]*
451
452	play white A3
453	910 reg_genmove black
454	#? [A1\|A2]
455
456	# One point to pick up the A1 stone under Japanese rules.
457	play black A1
458	play black C9
459	911 reg_genmove white
460	#? [A2]
461
462	# After white C1 black can make ko with A2 or seki in gote with D1.
463	undo
464	undo
465	undo
466	undo
467	undo
468	play black B1
469	912 reg_genmove white
470	#? [C1]
471
472	# White C1 was a mistake. Black makes life with territory at B3.
473	undo
474	undo
475	play white C1
476	913 reg_genmove black
477	#? [B3]
478
479
480	# Black should play B2. A2 and B1 leave an unnecessary ko threat.
481	loadsgf games/seki14.sgf
482	1001 reg_genmove white
483	#? [B2]
484	1002 reg_genmove black
485	#? [B2]
486
487
488	loadsgf games/seki15.sgf
489	1101 reg_genmove white
490	#? [D1]*
491	1102 reg_genmove black
492	#? [C1\|C2\|D2]*
493
494	play white D1
495	1103 reg_genmove black
496	#? [E2]
497
498	play black E2
499	1104 reg_genmove white
500	#? [B1]*
501
502	play white B1
503	1105 reg_genmove black
504	#? [C2]
505
506	play black C2
507	1106 reg_genmove white
508	#? [C1]
509
510
511	loadsgf games/seki16.sgf
512	1201 reg_genmove white
513	#? [B2]
514	1202 reg_genmove black
515	#? [B2]
516
517	# Black can make seki in sente with most moves but B1 and A2 lose one
518	# point. Tenuki let's white kill with ko.
519	play white B2
520	1203 reg_genmove black
521	#? [C2\|B3\|C1\|A3]
522
523	# B3, A2, and A1 fail to make seki.
524	play black C2
525	1204 reg_genmove white
526	#? [B1\|C1\|A3]
527
528	# A3, B3, and A2 all make seki, but B3 and A2 lose a point.
529	play white C1
530	1205 reg_genmove black
531	#? [A3]*
532
533	play black A3
534	1206 reg_genmove white
535	#? [B3\|A2\|B1]
536
537	play white B3
538	1207 reg_genmove black
539	#? [A2]
540
541	play black A2
542	1208 reg_genmove white
543	#? [B1]
544
545	undo
546	undo
547	play white A2
548	1209 reg_genmove black
549	#? [B3]*
550
551	play black B3
552	1210 reg_genmove white
553	#? [B1]
554
555	# A3 gains a point compared to A2. B1 is two points worse.
556	undo
557	undo
558	undo
559	play black B3
560	1211 reg_genmove white
561	#? [A3]
562
563	# A3 gains a point compared to B3. B1 is two points worse.
564	undo
565	play black A2
566	1212 reg_genmove white
567	#? [A3]
568
569	play white A3
570	1213 reg_genmove black
571	#? [B3]
572
573	play black B3
574	1214 reg_genmove white
575	#? [A1]
576
577	undo
578	undo
579	undo
580	undo
581
582	# Tenuki leaves seki but loses a point.
583	play white B1
584	1215 reg_genmove black
585	#? [C1\|A3\|B3\|A2\|C9]
586
587	# B3 and A2 both fail.
588	play black C1
589	1216 reg_genmove white
590	#? [A3]
591
592	# A2 also gives seki but loses a point, as does tenuki.
593	play white A3
594	1217 reg_genmove black
595	#? [B3]*
596
597	undo
598	undo
599	play black A3
600	1218 reg_genmove white
601	#? [C1]
602
603	# Tenuki is fine.
604	play white C1
605	1219 reg_genmove black
606	#? [B3\|A2\|C9]
607
608	undo
609	undo
610	play black B3
611	1220 reg_genmove white
612	#? [A2\|A3]*
613
614	undo
615	play black A2
616	1221 reg_genmove black
617	#? [B3\|A3]
618
619	# B1 and B3 lose a point.
620	undo
621	undo
622	play white A3
623	1222 reg_genmove black
624	#? [C1]*
625
626	play black C1
627	1223 reg_genmove white
628	#? [B1]
629
630	# Only A3 works. If black gets both C1 and A3, white can't do anything
631	# with two stones (in addition to B2).
632	undo
633	undo
634	undo
635	play black C1
636	1224 reg_genmove white
637	#? [A3]
638
639	play white A3
640	1225 reg_genmove black
641	#? [B1\|C2\|B3]
642
643	play black B1
644	1226 reg_genmove white
645	#? [C2]
646
647	play white C2
648	1227 reg_genmove black
649	#? [B3]*
650
651	# C1 is one point better than C2 and A3.
652	undo
653	undo
654	undo
655	undo
656	play black B1
657	1228 reg_genmove white
658	#? [C1]*
659
660	loadsgf games/FSGCBot-dr.sgf 234
661	2010 reg_genmove white
662	#? [A19\|B17]
663
664	loadsgf games/seki_nakade1.sgf
665	2020 dragon_status D9
666	#? [alive]
667
668	loadsgf games/seki_nakade2.sgf
669	2030 dragon_status F9
670	#? [critical H9 H9]*
671
672	play white H9
673	play white H7
674	play white G7
675	play white G9
676
677	2050 dragon_status G8
678	#? [alive]