Shakashaka


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Special thanks to Aevrin for the translation

Shakashaka (Proof of Quilt) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. Shakashaka is played on a rectangular grid. The grid has both black cells and white cells in it.
The objective is to place black triangles in the white cell in such a way so that they form white rectangular (or square) areas.
- The triangles are right angled and occupy half of the white square divided diagonally.
- You can place triangles only in white cells
- The numbers in the black cells indicate how many triangles are adjacent, vertically and horizontally.
- The white rectangles can be either straight or rotated at 45°

Video Tutorial
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Shakashaka


5x5 Shakashaka | 10x10 Shakashaka | 15x15 Shakashaka | 20x20 Shakashaka | 25x25 Shakashaka

This Month
1. Daiwie
92
01:11.10
2. lmsc5k
64
01:52.25
3. Kenolo353
113
02:01.60
4. sauceguardian
101
02:15.68
5. marbleeeee 02:26.57
6. Dorice
253
02:45.11
7. Dylexmus 02:55.36
8. Wangxuye 03:03.78
9. randomflyintaco
128
03:19.34
10. aequidens
256
03:36.05
11. RealShrimp 03:40.18
12. insanebrain 03:42.14
13. qobi
232
03:43.74
14. Hashibrown 03:49.76
15. Kuzuyu 04:11.41
16. Tezexlo
62
04:13.67
17. AnonyMinor
62
04:18.27
18. 喵緹
36
04:29.18
19. Chaojie Fu
69
05:15.47
20. NanogramFreak 05:17.69
This Week
1. Daiwie
92
01:22.28
2. lmsc5k
64
01:52.25
3. Kenolo353
113
02:07.53
4. marbleeeee 02:26.57
5. randomflyintaco
128
03:22.67
6. Dorice
253
03:27.90
7. insanebrain 03:42.14
8. Hashibrown 03:49.76
9. Tezexlo
62
04:13.67
10. AnonyMinor
62
04:18.27
11. Kuzuyu 04:28.40
12. Chaojie Fu
69
05:15.47
13. BlueBumblebee
6
07:21.94
14. aaaaaa22222 09:49.27
15. axolotl5
40
10:14.13
16. 신동근
11
12:33.87
17. lenghejvbian 28:13.21
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. Kenolo353
113
02:15.35
2. marbleeeee 02:39.85
3. insanebrain 03:42.14
4. randomflyintaco
128
03:45.36
5. Tezexlo
62
05:15.25
6. 신동근
11
12:33.87
7. aaaaaa22222 13:43.28
8. lenghejvbian 28:13.21
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. Douglas Shamlin Jr.
714
01:01.56
2. Daiwie
92
01:12.75
3. home
192
01:35.44
4. Tunnel Keeper
65
01:36.37
5. numbrr
301
01:38.18
6. TashiroMiraki
217
01:40.69
7. 梦逍遥
69
01:44.39
8. GreyPotato
46
01:47.45
9. lmsc5k
64
01:48.77
10. vowels
216
01:50.31
AO5
1. Douglas Shamlin Jr.
714
01:01.56
2. Daiwie
92
01:11.95
3. Tunnel Keeper
65
01:37.18
4. home
192
01:37.45
5. TashiroMiraki
217
01:43.47
6. 梦逍遥
69
01:46.59
7. numbrr
301
01:48.68
8. GreyPotato
46
01:49.96
9. vowels
216
01:50.31
10. lmsc5k
64
01:52.55
AO12
1. Douglas Shamlin Jr.
714
01:05.53
2. Daiwie
92
01:18.98
3. home
192
01:42.18
4. Tunnel Keeper
65
01:45.85
5. TashiroMiraki
217
01:48.06
6. 梦逍遥
69
01:52.71
7. numbrr
301
01:54.77
8. GreyPotato
46
01:59.04
9. vowels
216
01:59.93
10. lmsc5k
64
02:00.44
Robots / programmatic solversinfo  
1.SATBot00:18.151
2.kanaderu
1
04:55.008
3.Kx1WillTill2:29:56.870

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2025-10-30 22:12:48

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