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?
Research (Beta) Add / View flags +2
Author gedh2
Difficulty 2 dan (history)
AVG solve time 69 sec
User attempts 513 / 2134
Genre endgame
Similar problems
Created 2005-06-28
Source A game on DGS
Stars 2.86  (7 votes)
Collections
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 User Rating When Result Path Time
— 16 kyu 2024-10-01 11:28:08 Failed H7 T4 N/A
— 16 kyu 2024-09-26 19:48:25 Failed T4 H4 H6 N/A
— 5 kyu 2024-04-08 23:40:22 Got It H4 G7 G6 T4 N/A
— 5 kyu 2023-07-21 02:55:56 Failed G7 T4 N/A
— 2 kyu 2023-07-19 05:52:27 Got It H4 G7 G6 T4 N/A
— 3 dan 2023-06-09 20:01:57 Failed H4 G7 G6 T4 N/A
— 15 kyu 2023-05-31 15:40:53 Failed C4 N/A
— 6 kyu 2023-05-19 13:19:13 Failed J10 N/A
— 7 kyu 2023-04-08 06:51:02 Got It H4 G7 G6 T4 N/A
— 4 kyu 2023-03-20 00:44:02 Failed T4 H4 J5 N/A
— 7 kyu 2022-11-29 08:01:29 Failed L16 N/A
— 7 kyu 2022-11-27 12:29:29 Got It H4 G7 G6 T4 N/A
:go 1 dan 2022-03-04 00:39:47 Got It H4 G7 G6 T4 N/A
:go 1 dan 2022-02-21 17:31:53 Failed T4 H4 J5 N/A
edegroot 3 kyu 2021-09-30 20:23:31 Failed T4 H4 J5 N/A
— 4 kyu 2021-08-15 00:29:34 Failed G7 T4 N/A
— 2 kyu 2021-06-24 09:33:33 Got It H4 G7 G6 T4 N/A
— 5 dan 2021-03-22 16:32:33 Failed T4 H4 P16 G7 G6 H7 J6 N/A
— 5 dan 2020-12-27 14:47:04 Got It H4 G7 G6 T4 N/A
BartTM 2 kyu 2020-10-11 15:19:31 Got It H4 G7 G6 T4 N/A
— 1 kyu 2020-08-19 11:44:19 Got It H4 G7 G6 T4 N/A
— 7 dan 2020-04-01 18:47:17 Got It H4 G7 G6 T4 N/A
BartTM 2 kyu 2020-03-25 10:16:46 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
twop 10 kyu 2020-02-21 18:51:56 Failed T4 H4 J5 N/A
ranka 5 kyu 2020-01-06 14:13:25 Got It H4 G7 G6 T4 N/A
— 5 kyu 2019-09-25 06:19:12 Failed T4 H4 G7 N/A
— 2 dan 2019-08-03 11:13:56 Failed T4 H4 J5 N/A
ranka 5 kyu 2019-01-28 14:54:09 Got It H4 G7 G6 T4 N/A
— 2 kyu 2018-07-30 12:35:10 Failed T4 H4 J5 N/A
ranka 5 kyu 2018-05-20 09:52:51 Got It H4 G7 G6 T4 N/A
— 2 kyu 2018-04-02 03:45:25 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
ranka 5 kyu 2018-02-25 11:03:55 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9 N/A
— 3 dan 2018-01-22 11:10:25 Got It H4 G7 G6 T4 N/A
— 5 kyu 2018-01-19 09:47:23 Failed J10 N/A
— 1 dan 2018-01-10 17:17:56 Got It H4 G7 G6 T4 N/A
— 9 dan 2017-12-09 12:09:40 Got It H4 G7 G6 T4 N/A
— 3 dan 2017-11-05 15:53:39 Got It H4 G7 G6 T4 N/A
— 7 dan 2017-10-28 16:16:59 Got It H4 G7 G6 T4 N/A
— 2 kyu 2017-09-19 10:33:29 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L5 H10 J10 H9 N/A
ranka 5 kyu 2017-08-30 10:32:52 Got It H4 G7 G6 T4 N/A
— 1 dan 2017-08-05 11:53:25 Failed H4 G7 G6 T4 N/A
— 8 kyu 2017-08-01 08:59:52 Failed T4 H4 J5 N/A
— 13 kyu 2017-07-04 14:03:22 Got It H4 G7 G6 T4 N/A
— 5 kyu 2017-06-20 11:17:14 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 7 dan 2017-06-14 20:28:13 Got It H4 G7 G6 T4 N/A
shamerrus 8 kyu 2017-05-24 11:11:18 Failed T4 H4 J5 N/A
— 2 kyu 2017-05-19 19:49:02 Failed T4 H4 J5 N/A
— 6 kyu 2017-05-15 12:55:27 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 6 kyu 2017-04-30 00:02:38 Failed T4 H4 J5 N/A
pento 10 kyu 2017-04-26 23:24:26 Failed C4 N/A
pento 10 kyu 2017-04-24 03:10:23 Failed T9 N/A
— 6 kyu 2017-04-08 22:21:10 Got It H4 G7 G6 T4 N/A
— 13 kyu 2017-03-19 05:14:40 Got It H4 G7 G6 T4 N/A
— 1 kyu 2017-02-24 20:49:09 Got It H4 G7 G6 T4 N/A
— 6 kyu 2016-11-03 15:50:31 Got It H4 G7 G6 T4 N/A
— 13 kyu 2016-10-26 12:33:01 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9 N/A
— 9 kyu 2016-09-08 09:02:27 Got It H4 G7 G6 T4 N/A
— 4 kyu 2016-08-23 02:16:34 Failed T4 H4 G7 N/A
— 7 kyu 2016-06-03 08:08:15 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9 N/A
— 6 kyu 2016-06-03 07:59:44 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9 N/A
— 8 kyu 2016-05-25 04:54:29 Failed T4 H4 J5 N/A
— 8 kyu 2016-05-25 04:54:05 Got It H4 G7 G6 T4 N/A
— 2 kyu 2016-04-17 14:20:52 Failed T4 H4 H7 N/A
— 5 dan 2016-04-11 18:30:48 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 1 kyu 2016-03-20 12:34:32 Failed T4 H4 P16 G7 G6 H7 J6 N/A
Zander 5 kyu 2016-02-10 02:24:36 Failed T4 H4 H7 N/A
— 2 dan 2016-01-19 10:01:43 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L8 H10 J10 H9 N/A
— 5 kyu 2016-01-17 14:10:31 Failed H4 G7 G6 T4 N/A
— 3 dan 2016-01-13 19:12:56 Got It H4 G7 G6 T4 N/A
— 8 dan 2015-11-28 00:47:17 Got It H4 G7 G6 T4 N/A
— 1 kyu 2015-11-18 18:30:55 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 1 kyu 2015-11-08 17:56:15 Failed T4 H4 P16 G7 G6 H7 J6 N/A
— 1 kyu 2015-08-31 04:51:56 Got It H4 G7 G6 T4 N/A
— 3 dan 2015-08-06 18:06:12 Got It H4 G7 G6 T4 N/A
— 1 kyu 2015-07-25 21:11:33 Got It H4 G7 G6 T4 N/A
— 11 kyu 2015-07-08 22:25:54 Got It H4 G7 G6 T4 N/A
— 11 kyu 2015-07-08 22:06:52 Failed T4 H4 P16 G7 G6 H7 J6 N/A
— 1 dan 2015-03-18 00:10:39 Failed G7 T4 N/A
BartTM 2 kyu 2015-03-06 07:46:18 Failed T4 H4 H3 N/A
— 6 kyu 2015-03-04 23:54:26 Got It H4 G7 G6 T4 N/A
calabiyau 7 dan 2015-03-02 10:57:39 Got It H4 G7 G6 T4 N/A
briv 3 dan 2015-02-17 22:18:45 Got It H4 G7 G6 T4 N/A
— 1 dan 2015-02-02 21:12:58 Failed T4 H4 H7 N/A
— 1 dan 2015-02-01 07:32:11 Failed T4 H4 J5 N/A
ranka 5 kyu 2015-01-15 11:52:42 Got It H4 G7 G6 T4 N/A
— 1 kyu 2014-12-15 07:30:03 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
BartTM 2 kyu 2014-12-01 13:06:11 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 5 dan 2014-11-14 11:35:07 Failed G6 T4 N/A
— 1 dan 2014-11-10 03:20:29 Failed T4 H4 J5 N/A
— 5 kyu 2014-10-30 21:25:48 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 2 kyu 2014-10-18 01:36:54 Got It H4 G7 G6 T4 N/A
— 6 kyu 2014-09-06 03:27:16 Got It H4 G7 G6 T4 N/A
— 6 kyu 2014-09-06 03:20:27 Got It H4 G7 G6 T4 N/A
— 6 kyu 2014-09-03 21:30:20 Got It H4 G7 G6 T4 N/A
— 1 kyu 2014-06-22 13:43:50 Failed T4 H4 P16 G7 G6 H7 H6 J5 J6 J7 K6 K8 L5 H10 J10 H9 N/A
wukong1 3 dan 2014-05-30 17:32:57 Failed G6 T4 N/A
— 9 dan 2014-04-16 02:10:41 Got It H4 G7 G6 T4 N/A
— 1 dan 2013-11-29 03:58:26 Failed T4 H4 J5 N/A
— 5 dan 2013-10-31 22:08:56 Failed H4 G7 G6 T4 N/A
— 4 dan 2013-09-23 06:44:19 Failed T4 H4 N/A
— 6 dan 2013-08-25 15:14:02 Got It H4 G7 G6 T4 N/A
— 7 dan 2013-08-23 06:12:41 Got It H4 G7 G6 T4 N/A
— 7 dan 2013-08-23 06:12:13 Failed T4 H4 N/A
— 6 kyu 2013-08-17 23:44:06 Failed C4 N/A
— 6 kyu 2013-05-29 09:31:01 Failed G6 T4 N/A
— 5 dan 2013-05-27 18:37:31 Got It H4 G7 G6 T4 N/A
— 8 dan 2013-01-05 15:17:24 Failed J10 N/A
— 4 dan 2012-12-20 15:14:40 Got It H4 G7 G6 T4 N/A
— 4 dan 2012-12-20 15:13:54 Failed T4 H4 N/A
— 1 kyu 2012-08-11 02:43:26 Got It H4 G7 G6 T4 N/A
— 1 kyu 2012-08-11 02:43:11 Failed H4 G7 G6 T4 N/A
Field Mouse 5 dan 2012-07-21 11:58:07 Got It H4 G7 G6 T4 N/A
— 1 kyu 2012-07-09 21:33:36 Got It H4 G7 G6 T4 N/A
— 1 kyu 2012-07-09 12:19:48 Got It H4 G7 G6 T4 N/A
— 6 dan 2012-02-08 18:24:55 Failed J10 N/A
krt 9 dan 2012-01-05 04:13:43 Got It H4 G7 G6 T4 N/A
—´000 7 dan 2012-01-04 03:00:54 Got It H4 G7 G6 T4 N/A
— 5 kyu 2011-10-20 05:18:21 Got It H4 G7 G6 T4 N/A
— 5 kyu 2011-10-19 06:33:51 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 7 dan 2011-10-17 09:16:30 Failed T4 H4 G6 N/A
— 13 kyu 2011-06-05 23:37:19 Got It H4 G7 G6 T4 N/A
— 13 kyu 2011-06-05 03:06:10 Failed J5 G7 G6 T4 N/A
— 13 kyu 2011-05-25 03:42:16 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 3 dan 2011-05-03 03:51:57 Got It H4 G7 G6 T4 N/A
— 3 dan 2011-05-03 01:54:38 Failed H4 G7 G6 T4 N/A
— 5 kyu 2011-01-30 14:16:34 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 29 kyu 2010-12-16 00:40:00 Got It H4 G7 G6 T4 N/A
frostburn 7 kyu 2010-12-07 06:58:14 Got It H4 G7 G6 T4 N/A
frostburn 7 kyu 2010-12-07 06:57:18 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
frostburn 7 kyu 2010-12-07 06:56:50 Failed T4 H4 N/A
— 21 kyu 2010-11-09 19:17:36 Failed T4 H4 P16 G7 G6 H7 J5 H10 H9 N/A
MrMoto 5 kyu 2010-11-07 15:27:28 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 29 kyu 2010-10-26 05:30:31 Failed T4 H4 G7 N/A
— 14 kyu 2010-09-19 07:54:32 Failed G7 T4 N/A
— 8 kyu 2010-06-24 11:55:14 Got It H4 G7 G6 T4 N/A
— 8 kyu 2010-06-24 11:54:51 Failed T4 H4 N/A
gobluesky 19 kyu 2010-06-20 01:51:18 Failed H4 G7 G6 T4 N/A
— 15 kyu 2010-05-18 16:10:20 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
Piccolo 4 kyu 2010-04-12 02:13:58 Got It H4 G7 G6 T4 N/A
Piccolo 4 kyu 2010-04-12 02:13:07 Failed T4 H4 N/A
— 14 kyu 2010-03-18 15:25:13 Failed T9 N/A
— 9 dan 2010-03-11 00:32:00 Got It H4 G7 G6 T4 N/A
— 9 dan 2010-03-11 00:31:22 Failed T4 H4 N/A
— 14 kyu 2009-12-18 18:33:39 Failed G7 T4 N/A
alexandrk 1 dan 2009-11-30 07:27:44 Got It H4 G7 G6 T4 N/A
alexandrk 1 dan 2009-11-30 07:16:49 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 29 kyu 2009-08-18 18:45:04 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
dischord 4 dan 2009-04-29 06:49:22 Got It H4 G7 G6 T4 N/A
— 29 kyu 2008-12-28 08:11:13 Got It H4 G7 G6 T4 N/A
— 28 kyu 2008-12-13 03:45:51 Failed H4 G7 G6 T4 N/A
— 28 kyu 2008-12-13 03:35:00 Failed H4 G7 G6 N/A
alexandrk 1 dan 2008-09-16 01:34:59 Got It H4 G7 G6 T4 N/A
alexandrk 1 dan 2008-09-16 01:33:28 Failed T4 H4 G7 N/A
— 1 dan 2008-08-30 15:01:55 Failed T4 H4 N/A
— 7 kyu 2008-07-05 15:35:53 Got It H4 G7 G6 T4 N/A
Piccolo 4 kyu 2008-07-05 15:36:50 Failed T4 H4 N/A
— 7 kyu 2008-06-27 13:50:22 Failed T4 H4 G7 N/A
Dudzik 4 kyu 2007-12-30 19:52:26 Failed T4 H4 N/A
Hagios 29 kyu 2007-11-13 19:20:49 Got It H4 G7 G6 T4 N/A
Hagios 29 kyu 2007-11-13 19:01:46 Failed T4 H4 N/A
marwin 26 kyu 2007-11-13 00:49:31 Got It H4 G7 G6 T4 N/A
WTD 5 kyu 2007-10-13 09:33:33 Got It H4 G7 G6 T4 N/A
WTD 5 kyu 2007-10-13 09:32:07 Failed T4 H4 N/A
— 29 kyu 2007-04-17 23:36:04 Got It H4 G7 G6 T4 N/A
— 29 kyu 2007-04-17 23:35:21 Failed N/A
— 8 kyu 2007-04-02 02:57:58 Got It H4 G7 G6 T4 N/A
— 3 dan 2007-03-29 21:26:34 Got It H4 G7 G6 T4 N/A
— 3 dan 2007-03-28 20:33:06 Failed T4 H4 J5 N/A
— 3 dan 2007-03-13 20:55:11 Failed T4 H4 G7 N/A
SixTimes7 11 kyu 2007-01-23 04:21:46 Failed T4 H4 G6 N/A
ketran0 29 kyu 2006-12-05 13:01:05 Got It H4 G7 G6 T4 A19 N/A
ketran0 29 kyu 2006-12-05 13:00:22 Failed G7 T4 A19 N/A
Dudzik 4 kyu 2006-11-20 21:29:55 Failed H4 G7 G6 T4 A19 N/A
— 2 dan 2006-09-04 19:00:10 Got It H4 G7 G6 T4 A19 N/A
— 2 dan 2006-06-23 13:25:43 Failed T4 H4 P16 G7 G6 H7 J6 A19 N/A
kochi 7 kyu 2006-04-28 20:34:31 Got It H4 G7 G6 T4 A19 N/A
kochi 7 kyu 2006-04-17 00:22:23 Failed T4 H4 J5 A19 N/A
hello 28 kyu 2006-04-15 10:42:21 Failed T4 H4 J5 N/A
— 2 kyu 2006-02-28 09:58:51 Failed T4 H4 P16 G7 G6 H7 J6 N/A
Athanatos 5 dan 2006-01-18 07:44:39 Got It H4 G7 G6 T4 N/A
kochi 7 kyu 2005-11-29 02:46:29 Failed T4 H4 P16 G7 G6 H7 J6 N/A
— 1 dan 2005-11-28 15:14:54 Got It H4 G7 G6 T4 N/A
— 1 dan 2005-11-28 15:13:46 Failed T4 H4 J5 N/A
ciith 20 kyu 2005-11-02 17:07:12 Failed G6 T4 N/A
Field Mouse 5 dan 2005-10-16 11:36:36 Got It H4 G7 G6 T4 N/A
Field Mouse 5 dan 2005-10-16 11:36:28 Failed H4 G7 G6 T4 N/A
— 29 kyu 2005-08-18 09:01:28 Got It H4 G7 G6 T4 N/A
— 29 kyu 2005-08-17 22:05:45 Failed J6 N/A
— 2 kyu 2005-07-25 06:29:59 Got It H4 G7 G6 T4 N/A
— 28 kyu 2005-07-19 12:49:32 Got It H4 G7 G6 T4 N/A
— 1 dan 2005-07-19 08:53:44 Failed H4 G7 G6 T4 N/A
Hans 29 kyu 2005-07-18 10:18:14 Failed T4 H4 P16 G7 G6 H7 J6 N/A
LCZLAPINSKI 18 kyu 2005-07-15 10:14:08 Failed T4 H4 J5 N/A
Zwom 1 kyu 2005-07-14 10:13:14 Failed G7 T4 N/A
— 2 dan 2005-07-13 13:35:13 Failed T4 H4 P16 G7 G6 H7 J5 H10 J10 H9 N/A
— 28 kyu 2005-07-12 14:42:41 Failed G6 T4 N/A
— 29 kyu 2005-07-08 20:04:12 Failed T4 H4 H7 N/A
— 2 kyu 2005-07-08 11:12:40 Got It H4 G7 G6 T4 N/A
— 2 kyu 2005-07-02 13:43:23 Got It H4 G7 G6 T4 N/A
MrMoto 5 kyu 2005-07-01 19:48:54 Failed G6 T4 N/A
Zwom 1 kyu 2005-06-30 20:31:56 Failed G7 T4 N/A
— 1 kyu 2005-06-28 16:08:28 Got It H4 G7 G6 T4 N/A
— 29 kyu 2005-06-28 13:41:53 Failed T4 H4 P16 G7 G6 H7 J5 J9 N/A
BartTM 2 kyu 2005-06-28 13:35:06 Got It H4 G7 G6 T4 N/A
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 T4 H4 G6
2 Failed T9
1 Failed L16
1 Failed T4 H4 H3
1 Failed T4 H4 H6
1 Failed H7 T4
1 Failed J5 G7 G6 T4
1 Failed T4 H4 P16 G7 G6 H7 J5 H10 H9
1 Failed H4 G7 G6
1 Failed G7 T4 A19
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