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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1. Noridice
113
01:50.42
2. vilodi
84
02:15.14
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4. Qian_from_China
127
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53
03:01.67
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121
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62
04:37.07
9. qobi
227
04:58.62
10. acl68
53
05:42.29
11. Solander
60
05:51.83
12. Feanor 06:28.59
13. AnonyMinor
52
06:29.18
14. sporg 07:15.25
15. clare169 20:21.57
16. slyguy519
52
23:51.67
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This Week
1. Noridice
113
01:50.42
2. dvsc08
53
03:01.67
3. sporg 07:15.25
4. slyguy519
52
23:51.67
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Today
1. dvsc08
53
04:09.24
2. sporg 07:15.25
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MO3
1. Puzzler3
48
01:39.01
2. Deglis
44
01:41.50
3. daanbe
215
01:43.61
4. ThePipeline
85
01:50.53
5. vowels
216
01:53.99
6. Noridice
113
01:55.34
7. Frog The Toast
62
01:55.82
8. haramey
230
01:58.46
9. numbrr
297
01:59.07
10.anonymous
89
02:02.64
AO5
1. daanbe
215
01:45.53
2. Deglis
44
01:45.61
3. Puzzler3
48
01:51.15
4. vowels
216
01:55.51
5. Frog The Toast
62
01:57.37
6. Noridice
113
02:00.13
7. haramey
230
02:03.36
8. ThePipeline
85
02:05.73
9.anonymous
89
02:06.59
10. numbrr
297
02:07.70
AO12
1. Deglis
44
01:54.12
2. daanbe
215
01:54.46
3. vowels
216
02:02.02
4. Noridice
113
02:05.42
5. Frog The Toast
62
02:08.98
6.anonymous
89
02:12.81
7. ThePipeline
85
02:13.97
8. haramey
230
02:14.69
9. Make
273
02:15.74
10. Ailurus
176
02:19.31
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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2025-07-18 23:38:02

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