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
89
01:08.76
2. Tunnel Keeper
64
01:42.78
3. lmsc5k
64
01:44.42
4. Kenolo353
110
02:02.77
5. YoungNam 02:46.69
6. randomflyintaco
120
03:06.79
7. Dorice
247
03:07.55
8. marbleeeee 03:13.79
9. qobi
230
03:32.82
10. aequidens
252
03:42.90
11. La22y 03:49.81
12. 雨希
27
03:59.16
13. insanebrain 04:05.43
14. HerrNoix 04:14.25
15. AnonyMinor
58
04:39.72
16. leona836 05:08.89
17. AzuReVaPouR 05:10.23
18. Tezexlo
61
05:11.04
19. NanogramFreak 05:28.60
20. sinasplit
148
05:32.57
This Week
1. Daiwie
89
01:08.95
2. lmsc5k
64
01:56.86
3. Kenolo353
110
02:06.63
4. YoungNam 02:49.42
5. randomflyintaco
120
03:06.79
6. marbleeeee 03:13.79
7. Dorice
247
03:15.43
8. qobi
230
03:32.82
9. aequidens
252
03:45.85
10. 雨希
27
03:59.16
11. insanebrain 04:27.81
12. leona836 05:08.89
13. Tezexlo
61
05:11.04
14. AnonyMinor
58
05:28.72
15. NanogramFreak 06:03.37
16. RineandYou 07:23.46
17. drbop
45
11:13.09
18. gorilla801 13:29.17
19. aeunchae
8
16:05.75
20. stellaluna
14
1d 02:10:20.61
Today
1. lmsc5k
64
01:58.18
2. Kenolo353
110
02:38.83
3. YoungNam 02:56.73
4. Dorice
247
03:34.25
5. Tezexlo
61
06:28.66
6. aeunchae
8
16:05.75
7.--- empty -----:--
8.--- empty -----:--
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.
709
01:01.56
2. Daiwie
89
01:13.33
3. home
192
01:35.44
4. Tunnel Keeper
64
01:36.37
5. numbrr
300
01:38.18
6. TashiroMiraki
216
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.
709
01:01.56
2. Daiwie
89
01:11.95
3. Tunnel Keeper
64
01:37.18
4. home
192
01:37.45
5. TashiroMiraki
216
01:43.47
6. 梦逍遥
69
01:46.59
7. numbrr
300
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.
709
01:05.53
2. Daiwie
89
01:18.98
3. home
192
01:42.18
4. Tunnel Keeper
64
01:45.85
5. TashiroMiraki
216
01:48.06
6. 梦逍遥
69
01:52.71
7. numbrr
300
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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2025-09-15 10:28:06

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