Next 2 dan endgame
It's endgame, and a 1 point ko at t4/t5 has been rumbling on for a while. At this stage, black has captured one more white prisoner than white has of black (japanese rules, komi 6.5). For his next ko threat, white unleashes F5 (circled). Black to Play. Defend the threat, fill the ko, or play something else?
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Author gedh2 Created 2005-06-28
Difficulty 2 dan (history) Source A game on DGS
AVG solve time 69 sec Stars 2.86  (7 votes)
User attempts 513 / 2132 Collections Counting Points, Amateur Game, Whole Board Positions, Ko / Ko Threats
Genre endgame Your attempts N/A
Similar problems
Created 2005-06-28
Source A game on DGS
Stars 2.86  (7 votes)
Collections Counting Points, Amateur Game, Whole Board Positions, Ko / Ko Threats
Your attempts N/A
This feature allows you to explore how other users have tried to solve this problem. The number appearing in an intersection shows how many people went down that particular path. As well as being nice for curiosity's sake, this feature also shows problem creators where they might need to add more explanations of why certain moves don't work.
User Attempts
Name When Result Path
— 2024-04-08 23:40:22 Got It H4 G7 G6 T4
— 2023-07-21 02:55:56 Failed G7 T4
— 2023-07-19 05:52:27 Got It H4 G7 G6 T4
— 2023-06-09 20:01:57 Failed H4 G7 G6 T4
— 2023-05-31 15:40:53 Failed C4
— 2023-05-19 13:19:13 Failed J10
— 2023-04-08 06:51:02 Got It H4 G7 G6 T4
— 2023-03-20 00:44:02 Failed T4 H4 J5
— 2022-11-29 08:01:29 Failed L16
— 2022-11-27 12:29:29 Got It H4 G7 G6 T4
:go 2022-03-04 00:39:47 Got It H4 G7 G6 T4
:go 2022-02-21 17:31:53 Failed T4 H4 J5
edegroot 2021-09-30 20:23:31 Failed T4 H4 J5
— 2021-08-15 00:29:34 Failed G7 T4
— 2021-06-24 09:33:33 Got It H4 G7 G6 T4
— 2021-03-22 16:32:33 Failed T4 H4 P16 G7 G6 H7 J6
— 2020-12-27 14:47:04 Got It H4 G7 G6 T4
BartTM 2020-10-11 15:19:31 Got It H4 G7 G6 T4
— 2020-08-19 11:44:19 Got It H4 G7 G6 T4
— 2020-04-01 18:47:17 Got It H4 G7 G6 T4
BartTM 2020-03-25 10:16:46 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
twop 2020-02-21 18:51:56 Failed T4 H4 J5
ranka 2020-01-06 14:13:25 Got It H4 G7 G6 T4
— 2019-09-25 06:19:12 Failed T4 H4 G7
— 2019-08-03 11:13:56 Failed T4 H4 J5
ranka 2019-01-28 14:54:09 Got It H4 G7 G6 T4
— 2018-07-30 12:35:10 Failed T4 H4 J5
ranka 2018-05-20 09:52:51 Got It H4 G7 G6 T4
— 2018-04-02 03:45:25 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
ranka 2018-02-25 11:03:55 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9
— 2018-01-22 11:10:25 Got It H4 G7 G6 T4
— 2018-01-19 09:47:23 Failed J10
— 2018-01-10 17:17:56 Got It H4 G7 G6 T4
— 2017-12-09 12:09:40 Got It H4 G7 G6 T4
— 2017-11-05 15:53:39 Got It H4 G7 G6 T4
— 2017-10-28 16:16:59 Got It H4 G7 G6 T4
— 2017-09-19 10:33:29 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L5 H10 J10 H9
ranka 2017-08-30 10:32:52 Got It H4 G7 G6 T4
— 2017-08-05 11:53:25 Failed H4 G7 G6 T4
— 2017-08-01 08:59:52 Failed T4 H4 J5
— 2017-07-04 14:03:22 Got It H4 G7 G6 T4
— 2017-06-20 11:17:14 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2017-06-14 20:28:13 Got It H4 G7 G6 T4
shamerrus 2017-05-24 11:11:18 Failed T4 H4 J5
— 2017-05-19 19:49:02 Failed T4 H4 J5
— 2017-05-15 12:55:27 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2017-04-30 00:02:38 Failed T4 H4 J5
pento 2017-04-26 23:24:26 Failed C4
pento 2017-04-24 03:10:23 Failed T9
— 2017-04-08 22:21:10 Got It H4 G7 G6 T4
— 2017-03-19 05:14:40 Got It H4 G7 G6 T4
— 2017-02-24 20:49:09 Got It H4 G7 G6 T4
— 2016-11-03 15:50:31 Got It H4 G7 G6 T4
— 2016-10-26 12:33:01 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9
— 2016-09-08 09:02:27 Got It H4 G7 G6 T4
— 2016-08-23 02:16:34 Failed T4 H4 G7
— 2016-06-03 08:08:15 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9
— 2016-06-03 07:59:44 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9
— 2016-05-25 04:54:29 Failed T4 H4 J5
— 2016-05-25 04:54:05 Got It H4 G7 G6 T4
— 2016-04-17 14:20:52 Failed T4 H4 H7
— 2016-04-11 18:30:48 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2016-03-20 12:34:32 Failed T4 H4 P16 G7 G6 H7 J6
Zander 2016-02-10 02:24:36 Failed T4 H4 H7
— 2016-01-19 10:01:43 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9
— 2016-01-17 14:10:31 Failed H4 G7 G6 T4
— 2016-01-13 19:12:56 Got It H4 G7 G6 T4
— 2015-11-28 00:47:17 Got It H4 G7 G6 T4
— 2015-11-18 18:30:55 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2015-11-08 17:56:15 Failed T4 H4 P16 G7 G6 H7 J6
— 2015-08-31 04:51:56 Got It H4 G7 G6 T4
— 2015-08-06 18:06:12 Got It H4 G7 G6 T4
— 2015-07-25 21:11:33 Got It H4 G7 G6 T4
— 2015-07-08 22:25:54 Got It H4 G7 G6 T4
— 2015-07-08 22:06:52 Failed T4 H4 P16 G7 G6 H7 J6
— 2015-03-18 00:10:39 Failed G7 T4
BartTM 2015-03-06 07:46:18 Failed T4 H4 H3
— 2015-03-04 23:54:26 Got It H4 G7 G6 T4
calabiyau 2015-03-02 10:57:39 Got It H4 G7 G6 T4
briv 2015-02-17 22:18:45 Got It H4 G7 G6 T4
— 2015-02-02 21:12:58 Failed T4 H4 H7
— 2015-02-01 07:32:11 Failed T4 H4 J5
ranka 2015-01-15 11:52:42 Got It H4 G7 G6 T4
— 2014-12-15 07:30:03 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
BartTM 2014-12-01 13:06:11 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2014-11-14 11:35:07 Failed G6 T4
— 2014-11-10 03:20:29 Failed T4 H4 J5
— 2014-10-30 21:25:48 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2014-10-18 01:36:54 Got It H4 G7 G6 T4
— 2014-09-06 03:27:16 Got It H4 G7 G6 T4
— 2014-09-06 03:20:27 Got It H4 G7 G6 T4
— 2014-09-03 21:30:20 Got It H4 G7 G6 T4
— 2014-06-22 13:43:50 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L5 H10 J10 H9
wukong1 2014-05-30 17:32:57 Failed G6 T4
— 2014-04-16 02:10:41 Got It H4 G7 G6 T4
— 2013-11-29 03:58:26 Failed T4 H4 J5
— 2013-10-31 22:08:56 Failed H4 G7 G6 T4
— 2013-09-23 06:44:19 Failed T4 H4
— 2013-08-25 15:14:02 Got It H4 G7 G6 T4
— 2013-08-23 06:12:41 Got It H4 G7 G6 T4
— 2013-08-23 06:12:13 Failed T4 H4
— 2013-08-17 23:44:06 Failed C4
— 2013-05-29 09:31:01 Failed G6 T4
— 2013-05-27 18:37:31 Got It H4 G7 G6 T4
— 2013-01-05 15:17:24 Failed J10
— 2012-12-20 15:14:40 Got It H4 G7 G6 T4
— 2012-12-20 15:13:54 Failed T4 H4
— 2012-08-11 02:43:26 Got It H4 G7 G6 T4
— 2012-08-11 02:43:11 Failed H4 G7 G6 T4
Field Mouse 2012-07-21 11:58:07 Got It H4 G7 G6 T4
— 2012-07-09 21:33:36 Got It H4 G7 G6 T4
— 2012-07-09 12:19:48 Got It H4 G7 G6 T4
— 2012-02-08 18:24:55 Failed J10
krt 2012-01-05 04:13:43 Got It H4 G7 G6 T4
—´000 2012-01-04 03:00:54 Got It H4 G7 G6 T4
— 2011-10-20 05:18:21 Got It H4 G7 G6 T4
— 2011-10-19 06:33:51 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2011-10-17 09:16:30 Failed T4 H4 G6
— 2011-06-05 23:37:19 Got It H4 G7 G6 T4
— 2011-06-05 03:06:10 Failed J5 G7 G6 T4
— 2011-05-25 03:42:16 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2011-05-03 03:51:57 Got It H4 G7 G6 T4
— 2011-05-03 01:54:38 Failed H4 G7 G6 T4
— 2011-01-30 14:16:34 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2010-12-16 00:40:00 Got It H4 G7 G6 T4
frostburn 2010-12-07 06:58:14 Got It H4 G7 G6 T4
frostburn 2010-12-07 06:57:18 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
frostburn 2010-12-07 06:56:50 Failed T4 H4
— 2010-11-09 19:17:36 Failed T4 H4 P16 G7 G6 H7 J5 H10 H9
MrMoto 2010-11-07 15:27:28 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2010-10-26 05:30:31 Failed T4 H4 G7
— 2010-09-19 07:54:32 Failed G7 T4
— 2010-06-24 11:55:14 Got It H4 G7 G6 T4
— 2010-06-24 11:54:51 Failed T4 H4
gobluesky 2010-06-20 01:51:18 Failed H4 G7 G6 T4
— 2010-05-18 16:10:20 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
Piccolo 2010-04-12 02:13:58 Got It H4 G7 G6 T4
Piccolo 2010-04-12 02:13:07 Failed T4 H4
— 2010-03-18 15:25:13 Failed T9
— 2010-03-11 00:32:00 Got It H4 G7 G6 T4
— 2010-03-11 00:31:22 Failed T4 H4
— 2009-12-18 18:33:39 Failed G7 T4
alexandrk 2009-11-30 07:27:44 Got It H4 G7 G6 T4
alexandrk 2009-11-30 07:16:49 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2009-08-18 18:45:04 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
dischord 2009-04-29 06:49:22 Got It H4 G7 G6 T4
— 2008-12-28 08:11:13 Got It H4 G7 G6 T4
— 2008-12-13 03:45:51 Failed H4 G7 G6 T4
— 2008-12-13 03:35:00 Failed H4 G7 G6
alexandrk 2008-09-16 01:34:59 Got It H4 G7 G6 T4
alexandrk 2008-09-16 01:33:28 Failed T4 H4 G7
— 2008-08-30 15:01:55 Failed T4 H4
— 2008-07-05 15:35:53 Got It H4 G7 G6 T4
Piccolo 2008-07-05 15:36:50 Failed T4 H4
— 2008-06-27 13:50:22 Failed T4 H4 G7
Dudzik 2007-12-30 19:52:26 Failed T4 H4
Hagios 2007-11-13 19:20:49 Got It H4 G7 G6 T4
Hagios 2007-11-13 19:01:46 Failed T4 H4
marwin 2007-11-13 00:49:31 Got It H4 G7 G6 T4
WTD 2007-10-13 09:33:33 Got It H4 G7 G6 T4
WTD 2007-10-13 09:32:07 Failed T4 H4
— 2007-04-17 23:36:04 Got It H4 G7 G6 T4
— 2007-04-17 23:35:21 Failed
— 2007-04-02 02:57:58 Got It H4 G7 G6 T4
— 2007-03-29 21:26:34 Got It H4 G7 G6 T4
— 2007-03-28 20:33:06 Failed T4 H4 J5
— 2007-03-13 20:55:11 Failed T4 H4 G7
SixTimes7 2007-01-23 04:21:46 Failed T4 H4 G6
ketran0 2006-12-05 13:01:05 Got It H4 G7 G6 T4 A19
ketran0 2006-12-05 13:00:22 Failed G7 T4 A19
Dudzik 2006-11-20 21:29:55 Failed H4 G7 G6 T4 A19
— 2006-09-04 19:00:10 Got It H4 G7 G6 T4 A19
— 2006-06-23 13:25:43 Failed T4 H4 P16 G7 G6 H7 J6 A19
kochi 2006-04-28 20:34:31 Got It H4 G7 G6 T4 A19
kochi 2006-04-17 00:22:23 Failed T4 H4 J5 A19
hello 2006-04-15 10:42:21 Failed T4 H4 J5
— 2006-02-28 09:58:51 Failed T4 H4 P16 G7 G6 H7 J6
Athanatos 2006-01-18 07:44:39 Got It H4 G7 G6 T4
kochi 2005-11-29 02:46:29 Failed T4 H4 P16 G7 G6 H7 J6
— 2005-11-28 15:14:54 Got It H4 G7 G6 T4
— 2005-11-28 15:13:46 Failed T4 H4 J5
ciith 2005-11-02 17:07:12 Failed G6 T4
Field Mouse 2005-10-16 11:36:36 Got It H4 G7 G6 T4
Field Mouse 2005-10-16 11:36:28 Failed H4 G7 G6 T4
— 2005-08-18 09:01:28 Got It H4 G7 G6 T4
— 2005-08-17 22:05:45 Failed J6
— 2005-07-25 06:29:59 Got It H4 G7 G6 T4
— 2005-07-19 12:49:32 Got It H4 G7 G6 T4
— 2005-07-19 08:53:44 Failed H4 G7 G6 T4
Hans 2005-07-18 10:18:14 Failed T4 H4 P16 G7 G6 H7 J6
LCZLAPINSKI 2005-07-15 10:14:08 Failed T4 H4 J5
Zwom 2005-07-14 10:13:14 Failed G7 T4
— 2005-07-13 13:35:13 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
— 2005-07-12 14:42:41 Failed G6 T4
— 2005-07-08 20:04:12 Failed T4 H4 H7
— 2005-07-08 11:12:40 Got It H4 G7 G6 T4
— 2005-07-02 13:43:23 Got It H4 G7 G6 T4
MrMoto 2005-07-01 19:48:54 Failed G6 T4
Zwom 2005-06-30 20:31:56 Failed G7 T4
— 2005-06-28 16:08:28 Got It H4 G7 G6 T4
— 2005-06-28 13:41:53 Failed T4 H4 P16 G7 G6 H7 J5 J9
BartTM 2005-06-28 13:35:06 Got It H4 G7 G6 T4
Count Result Path
81 Got It H4 G7 G6 T4
18 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9
18 Failed T4 H4 J5
12 Failed T4 H4
10 Failed H4 G7 G6 T4
7 Failed G7 T4
7 Failed T4 H4 P16 G7 G6 H7 J6
6 Failed G6 T4
6 Failed T4 H4 G7
5 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9
4 Failed J10
4 Failed T4 H4 H7
3 Got It H4 G7 G6 T4 A19
3 Failed C4
2 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L5 H10 J10 H9
2 Failed T9
2 Failed T4 H4 G6
1 Failed J5 G7 G6 T4
1 Failed T4 H4 H3
1 Failed G7 T4 A19
1 Failed L16
1 Failed T4 H4 P16 G7 G6 H7 J5 H10 H9
1 Failed H4 G7 G6
1 Failed H4 G7 G6 T4 A19
1 Failed T4 H4 P16 G7 G6 H7 J6 A19
1 Failed T4 H4 J5 A19
1 Failed J6
1 Failed T4 H4 P16 G7 G6 H7 J5 J9