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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18. Wedinus 06:15.28
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This Week
1. lizardyi 01:08.45
2. Wuni14 02:25.32
3. gabobr
43
02:36.17
4. CroMa
70
03:30.67
5. 신동근
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6. daspore 04:20.42
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MO3
1. numbrr
301
00:49.66
2. Deglis
58
00:50.63
3. ThePipeline
87
00:55.51
4. daanbe
216
00:56.98
5. vowels
216
00:57.52
6. Make
275
00:59.01
7. Noridice
139
00:59.06
8. JZE
87
01:03.13
9. Puzzler3
51
01:03.85
10. haramey
233
01:05.47
AO5
1. numbrr
301
00:51.35
2. Deglis
58
00:53.27
3. ThePipeline
87
00:56.16
4. daanbe
216
00:56.27
5. Noridice
139
00:59.32
6. vowels
216
00:59.39
7. Make
275
01:01.15
8. Puzzler3
51
01:03.33
9. haramey
233
01:05.16
10. JZE
87
01:08.28
AO12
1. Deglis
58
00:55.75
2. ThePipeline
87
00:59.34
3. daanbe
216
00:59.96
4. vowels
216
01:02.10
5. Noridice
139
01:02.40
6. Make
275
01:03.21
7. numbrr
301
01:04.50
8. haramey
233
01:08.62
9. Ailurus
177
01:11.84
10. SilverHawk
212
01:13.41
Robots / programmatic solversinfo  
1.windex42-robot
1
00:00.320
2.occultations
6
00:10.466
3.Paul Bismuth
1
00:22.880

* MO3 - Mean of 3. The average of 3 consecutive times.
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2025-10-20 07:55:50

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