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

New Puzzle
This Month
1. sauceguardian
118
00:00.97
2. KarenNotARobot 00:02.31
3. PuzzleMaestro
109
00:02.61
4. Meerkat
221
00:03.06
5. Dorice
275
00:03.12
6. oracle3000
35
00:03.85
7. mts55
47
00:04.29
8. bigcheese 00:04.40
9. qobi
243
00:04.42
10. KingKahuka 00:04.62
10. Otenkiya
70
00:04.62
12. yoyo
30
00:05.63
13. Ermouf
116
00:06.34
14. 신동근
19
00:06.38
15. AlexanderIII 00:06.39
16. ma2urka 00:06.49
17. hymok
21
00:06.52
18. Rickieman86
14
00:07.50
19. MehtaMeet 00:07.91
20. passngrin 00:08.06
This Week
1. sauceguardian
118
00:01.39
2. KarenNotARobot 00:02.31
3. Meerkat
221
00:03.06
4. mts55
47
00:04.29
5. KingKahuka 00:04.62
6. 신동근
19
00:06.38
7. AlexanderIII 00:06.39
8. MehtaMeet 00:07.91
9. Koakuma
55
00:08.29
10. vilodi
144
00:08.83
11. hewenguang
19
00:11.70
12. chiimo 00:17.71
13. bigjimfridge
67
00:19.47
14. SilkyGrove
70
00:21.62
15. RosemaryW 00:22.29
16. Matthew Zimmer
45
00:42.51
17. TheEnd 00:44.78
18. Shimano
13
00:53.41
19.--- empty -----:--
20.--- empty -----:--
Today
1. vilodi
144
00:08.83
2. hewenguang
19
00:11.70
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.
724
00:00.90
2. vowels
216
00:01.07
3. jaybrainer
284
00:01.13
4. sauceguardian
118
00:01.22
5. lmsc5k
69
00:01.25
6. numbrr
327
00:01.60
7. SunOceanBeach
260
00:01.73
8. qqwref
266
00:01.75
9. MushroomsCavern
136
00:01.77
10. EC31
23
00:01.79
AO5
1. Douglas Shamlin Jr.
724
00:00.96
2. sauceguardian
118
00:01.28
3. jaybrainer
284
00:01.35
4. vowels
216
00:01.44
5. lmsc5k
69
00:01.47
6. numbrr
327
00:01.64
7. qqwref
266
00:01.87
8. SunOceanBeach
260
00:01.90
9. MushroomsCavern
136
00:01.96
10. Daiwie
104
00:01.97
AO12
1. Douglas Shamlin Jr.
724
00:01.18
2. sauceguardian
118
00:01.70
3. jaybrainer
284
00:01.73
4. lmsc5k
69
00:01.81
4. vowels
216
00:01.81
6. numbrr
327
00:02.09
7. SunOceanBeach
260
00:02.31
7. MushroomsCavern
136
00:02.31
9. qqwref
266
00:02.40
10. Daiwie
104
00:02.49
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:02.066
2.kanaderu
1
00:03.677
3.3333700:07.503

* 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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