Shakashaka


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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°

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Shakashaka


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

This Month
1. Kenolo353
113
00:11.00
2. lmsc5k
64
00:12.18
3. 3328037
57
00:18.18
4. RaiAT
70
00:18.97
5. KarenNotARobot 00:19.47
5. all-trees
46
00:19.47
7. Dorice
252
00:19.69
8. marbleeeee 00:19.77
8. sauceguardian
101
00:19.77
10. Wangxuye 00:20.69
11. randomflyintaco
128
00:22.66
12. insanebrain 00:23.33
13. maufufu
25
00:25.86
14. qobi
232
00:26.91
15. AlexanderIII 00:28.75
16. mrgmath
19
00:31.08
17. trLBumm
18
00:34.09
18. Jazka 00:37.42
19. ambiorix 00:38.02
20. S Otenkiya
55
00:38.99
This Week
1. lmsc5k
64
00:12.18
2. Kenolo353
113
00:14.52
3. 3328037
57
00:18.18
4. KarenNotARobot 00:19.47
5. randomflyintaco
128
00:23.70
6. insanebrain 00:24.68
7. maufufu
25
00:25.86
8. mrgmath
19
00:32.55
9. AlexanderIII 00:35.46
10. gorilla801 00:43.90
11. CLAVDIVS
65
00:46.38
12. yasuyo 00:47.57
13. ambiorix 00:52.60
14. clh123
12
00:54.74
15. RosemaryW 00:54.79
16. Jackrea100
25
01:15.66
17. 신동근
8
01:27.35
18. aaaaaa22222 01:30.16
19. FunAcroFly
103
01:30.38
20. Hiro Lynx
38
02:00.87
Today
1. Kenolo353
113
00:18.61
2. KarenNotARobot 00:24.35
3. randomflyintaco
128
00:24.55
4. CLAVDIVS
65
00:46.38
5. gorilla801 00:46.94
6. AlexanderIII 00:59.87
7. 신동근
8
01:27.35
8. RosemaryW 01:45.18
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
00:06.79
2. Daiwie
92
00:10.18
3. numbrr
301
00:10.41
4. sauceguardian
101
00:11.32
5. TashiroMiraki
217
00:11.43
6. vowels
216
00:11.50
7. lmsc5k
64
00:12.39
8. Tunnel Keeper
65
00:13.19
9. jaybrainer
242
00:13.22
10. sfumato
166
00:13.88
AO5
1. Douglas Shamlin Jr.
714
00:07.19
2. Daiwie
92
00:10.62
3. numbrr
301
00:12.12
4. TashiroMiraki
217
00:12.15
5. vowels
216
00:12.18
6. sauceguardian
101
00:12.24
7. lmsc5k
64
00:12.73
8. jaybrainer
242
00:13.55
9. Tunnel Keeper
65
00:13.58
10. qqwref
260
00:14.27
AO12
1. Douglas Shamlin Jr.
714
00:08.09
2. Daiwie
92
00:11.20
3. vowels
216
00:12.94
4. numbrr
301
00:13.28
5. sauceguardian
101
00:13.63
6. TashiroMiraki
217
00:13.69
7. lmsc5k
64
00:14.06
8. qqwref
260
00:15.59
9. Tunnel Keeper
65
00:16.78
10. jaybrainer
242
00:16.91
Robots / programmatic solversinfo  
1.hsjbh
1
01:26.414
2.Chen Enxiu
1
02:28.288
3.sysd
1
03:16.357

* 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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2025-10-28 21:30:58

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