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. RealShrimp 00:02.08
2. Wangxuye 00:02.11
3. Kenolo353
112
00:02.12
4. RaiAT
69
00:02.34
5. randomflyintaco
127
00:02.81
6. all-trees
45
00:03.14
7. Fjznbeinfnn 00:03.54
8. kamikazi
22
00:03.71
9. mrgmath
17
00:03.99
10. Dorice
252
00:04.79
11. trLBumm
18
00:04.87
12. AlexanderIII 00:04.90
13. Jackrea100
25
00:05.27
14. S Otenkiya
55
00:05.55
15. EdenGameMaster
25
00:05.66
16. gorilla801 00:05.83
17. AnonyMinor
61
00:05.96
18. Hashibrown 00:06.33
19. Kakuritsu 00:07.05
20. CreeperCrazy13 00:07.10
This Week
1. Wangxuye 00:02.11
2. Kenolo353
112
00:03.00
3. randomflyintaco
127
00:04.02
4. AlexanderIII 00:04.90
5. mrgmath
17
00:05.37
6. Hashibrown 00:06.33
7. gorilla801 00:07.18
8. kroller
8
00:09.15
9. CLAVDIVS
65
00:10.40
10. 时征
20
00:10.86
11. BlueBumblebee
3
00:13.12
12. drbop
45
00:13.36
13. RosemaryW 00:14.01
14. wellwhynot
70
00:17.30
15. doctorbutterfly
13
00:17.51
16. 张翀语
2
00:18.56
17. Samuelflorr 00:28.74
18. Terrakagi
2
00:30.58
19. aaaaaa22222 00:37.15
20. Creall
1
1d 02:15:16.26
Today
1. Kenolo353
112
00:03.00
2. gorilla801 00:07.18
3. CLAVDIVS
65
00:12.87
4. BlueBumblebee
3
00:13.12
5. doctorbutterfly
13
00:17.51
6. 张翀语
2
00:18.56
7. RosemaryW 00:21.47
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.
713
00:00.90
2. vowels
216
00:01.07
3. jaybrainer
241
00:01.16
4. numbrr
301
00:01.60
5. SunOceanBeach
260
00:01.73
6. sauceguardian
101
00:01.75
6. qqwref
260
00:01.75
8. EC31
23
00:01.79
9. sfumato
166
00:01.84
10. lmsc5k
64
00:01.91
AO5
1. Douglas Shamlin Jr.
713
00:00.96
2. vowels
216
00:01.44
3. jaybrainer
241
00:01.56
4. numbrr
301
00:01.73
5. qqwref
260
00:01.87
6. SunOceanBeach
260
00:01.90
7. lmsc5k
64
00:01.92
8. sauceguardian
101
00:01.94
9. Daiwie
91
00:01.97
10. sfumato
166
00:02.01
AO12
1. Douglas Shamlin Jr.
713
00:01.18
2. vowels
216
00:01.81
3. jaybrainer
241
00:02.06
4. numbrr
301
00:02.16
5. sauceguardian
101
00:02.28
6. SunOceanBeach
260
00:02.31
7. qqwref
260
00:02.40
8. lmsc5k
64
00:02.49
8. Daiwie
91
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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2025-10-23 19:25:03

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