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°

Video Tutorial
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Shakashaka


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

New Puzzle
This Month
1. sauceguardian
106
00:09.38
2. Kenolo353
123
00:14.66
3. KarenNotARobot 00:19.06
4. shiningyang
11
00:20.67
5. qobi
237
00:22.26
6. FishingPanda 00:22.78
7. knmidorika
58
00:32.39
8. Jiaminzhao
11
00:32.64
9. WYJ
78
00:32.71
10. e74yp8
10
00:35.17
11. Jazka 00:36.33
12. 신동근
18
00:41.35
13. Binaer
99
00:45.08
14. Odenzon
32
00:46.87
15. gorilla801
1
00:50.15
16. Jeremy Broomfield
21
00:51.56
17. CLAVDIVS
77
00:54.31
18. ambiorix 00:55.23
19. Kukko
176
00:57.17
20. RosemaryW 01:00.14
This Week
1. sauceguardian
106
00:09.38
2. shiningyang
11
00:20.67
3. KarenNotARobot 00:27.97
4. qobi
237
00:29.53
5. Jazka 00:36.33
6. Odenzon
32
00:53.80
7. CLAVDIVS
77
00:54.31
8. ambiorix 00:56.04
9. Kukko
176
00:57.17
10. Oryn
177
01:03.96
11. Rickieman86 01:06.28
12. Canon
19
01:12.58
13. RosemaryW 01:36.69
14. yosiaki
109
01:48.14
15. nobody4621
18
03:54.71
16. coleslaw
15
04:01.22
17. czygg
3
04:17.23
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. Jazka 00:36.33
2. Oryn
177
01:03.96
3. Rickieman86 01:06.28
4. Canon
19
01:12.58
5. nobody4621
18
03:54.71
6.--- empty -----:--
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.
720
00:06.79
2. Daiwie
101
00:10.18
3. numbrr
320
00:10.41
4. sauceguardian
106
00:11.16
5. TashiroMiraki
226
00:11.43
6. vowels
216
00:11.50
7. lmsc5k
67
00:11.97
8. home
213
00:12.37
9. Kenolo353
123
00:12.96
10. Tunnel Keeper
70
00:13.19
AO5
1. Douglas Shamlin Jr.
720
00:07.19
2. Daiwie
101
00:10.62
3. sauceguardian
106
00:11.71
4. numbrr
320
00:12.12
5. TashiroMiraki
226
00:12.15
6. vowels
216
00:12.18
7. home
213
00:12.39
8. lmsc5k
67
00:12.73
9. jaybrainer
264
00:13.55
10. Tunnel Keeper
70
00:13.58
AO12
1. Douglas Shamlin Jr.
720
00:08.09
2. Daiwie
101
00:11.20
3. vowels
216
00:12.94
4. sauceguardian
106
00:13.10
5. numbrr
320
00:13.28
6. TashiroMiraki
226
00:13.69
7. lmsc5k
67
00:14.03
8. Kenolo353
123
00:15.52
9. qqwref
266
00:15.59
10. Tunnel Keeper
70
00:16.78
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:03.495
2.hsjbh
1
01:26.414
3.Chen Enxiu
1
02:28.288

* 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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