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. 飞飞
51
00:01.81
2. Fjznbeinfnn 00:01.86
3. RealShrimp 00:02.08
4. marbleeeee 00:02.10
5. Wangxuye 00:02.11
6. Kenolo353
114
00:02.49
7. randomflyintaco
131
00:03.17
8. maufufu
26
00:03.63
9. mrgmath
20
00:03.99
10. 3328037
59
00:04.24
11. kroller
9
00:04.54
12. AlexanderIII 00:04.90
13. 신동근
13
00:05.01
14. 洪介興
22
00:05.06
15. Jackrea100
25
00:05.27
16. qobi
232
00:05.36
17. dtyamada
107
00:05.82
18. Hashibrown 00:06.33
19. KETJAK
34
00:06.63
20. gorilla801 00:07.18
This Week
1. 飞飞
51
00:01.81
2. marbleeeee 00:02.10
3. Kenolo353
114
00:02.69
4. randomflyintaco
131
00:03.59
5. mrgmath
20
00:04.78
6. 신동근
13
00:05.01
7. qobi
232
00:05.36
8. dtyamada
107
00:05.82
9. KETJAK
34
00:06.63
10. gorilla801 00:07.34
11. RosemaryW 00:07.46
12. knmidorika
52
00:08.05
12. Cinder_F
11
00:08.05
14. CLAVDIVS
65
00:10.14
15. HackMan
116
00:16.80
16. levos 00:35.82
17. Gage Williams
27
00:46.08
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. randomflyintaco
131
00:05.24
2. qobi
232
00:05.36
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
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.
714
00:00.90
2. vowels
216
00:01.07
3. jaybrainer
242
00:01.16
4. numbrr
301
00:01.60
5. SunOceanBeach
260
00:01.73
6. sauceguardian
101
00:01.75
6. qqwref
261
00:01.75
8. EC31
23
00:01.79
9. sfumato
166
00:01.84
10. lmsc5k
65
00:01.91
AO5
1. Douglas Shamlin Jr.
714
00:00.96
2. vowels
216
00:01.44
3. jaybrainer
242
00:01.56
4. numbrr
301
00:01.73
5. qqwref
261
00:01.87
6. SunOceanBeach
260
00:01.90
7. lmsc5k
65
00:01.92
8. sauceguardian
101
00:01.94
9. Daiwie
92
00:01.97
10. sfumato
166
00:02.01
AO12
1. Douglas Shamlin Jr.
714
00:01.18
2. vowels
216
00:01.81
3. jaybrainer
242
00:02.06
4. numbrr
301
00:02.16
5. sauceguardian
101
00:02.28
6. SunOceanBeach
260
00:02.31
7. qqwref
261
00:02.40
8. lmsc5k
65
00:02.49
8. Daiwie
92
00:02.49
10. sfumato
166
00:02.51
Robots / programmatic solversinfo  
1.kanaderu
1
00:03.677
2.liaohanlin888
1
00:09.128
3.tari77
1
00:11.623

* 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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2025-11-10 02:19:50

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