Yin-Yang


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Yin-Yang is a logic puzzle with simple rules and challenging solutions.

The rules are simple.Yin-Yang is played on a rectangular grid with no standard size. Some cells start out filled with black or white. The rest of the cells are empty. The goal is to color all cells in such a way that:
1. All black cells should be connected orthogonally in a single group.
2. All white cells should be connected orthogonally in a single group.
3. 2x2 areas of the same color are not allowed.

These 3 simple rules lead to some complex deductions, which are not so obvious. There are 2 important lemmas based on them, without which even the easy Yin-Yang puzzles seem very hard or even impossible to approach. You can learn these lemmas in the video tutorial below.

Video Tutorial
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Yin-Yang


6x6 Easy Yin-Yang | 6x6 Normal Yin-Yang | 6x6 Hard Yin-Yang | 10x10 Easy Yin-Yang | 10x10 Normal Yin-Yang | 10x10 Hard Yin-Yang | 15x15 Easy Yin-Yang | 15x15 Normal Yin-Yang | 15x15 Hard Yin-Yang | 20x20 Easy Yin-Yang | 20x20 Normal Yin-Yang | 20x20 Hard Yin-Yang | 25x25 Easy Yin-Yang | 25x25 Normal Yin-Yang | 25x25 Hard Yin-Yang

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85
01:35.03
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111
02:10.17
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02:15.14
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02:50.24
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03:23.52
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04:26.77
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04:37.07
12. brewcine
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04:46.59
13. acl68
53
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14. Solander
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05:51.83
15. AnonyMinor
51
06:29.18
16. Wuni14 06:46.83
17. sporg 09:22.53
18. APUCSX
30
10:28.70
19. clare169 20:21.57
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This Week
1. Qian_from_China
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02:50.24
2. Julie 0224
120
03:23.52
3. Solander
59
05:51.83
4. AnonyMinor
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06:29.18
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MO3
1. Puzzler3
46
01:39.01
2. Deglis
43
01:41.50
3. daanbe
215
01:43.61
4. ThePipeline
85
01:50.53
5. vowels
216
01:53.99
6. Frog The Toast
59
01:55.82
7. haramey
230
01:58.46
8. numbrr
297
01:59.07
9.anonymous
89
02:02.64
10. Make
272
02:07.63
AO5
1. daanbe
215
01:45.53
2. Deglis
43
01:45.61
3. Puzzler3
46
01:51.15
4. vowels
216
01:55.51
5. Frog The Toast
59
01:57.37
6. haramey
230
02:03.36
7. ThePipeline
85
02:05.73
8.anonymous
89
02:06.59
9. numbrr
297
02:07.70
10. Make
272
02:09.27
AO12
1. Deglis
43
01:54.12
2. daanbe
215
01:54.46
3. vowels
216
02:02.02
4. Frog The Toast
59
02:08.98
5.anonymous
89
02:12.81
6. ThePipeline
85
02:13.97
7. haramey
230
02:14.69
8. Make
272
02:15.74
9. Ailurus
176
02:19.31
10. miaoush
113
02:23.92
Robots / programmatic solversinfo  
1.QuickBrownFox
1
00:04.419
2.windex42-robot
1
00:07.931
3.Paul Bismuth
1
00:51.655

* 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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2025-07-07 01:47:33

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