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

This Month
1. Judaske
31
00:39.72
2. AGecko
72
00:40.01
3. ThePipeline
66
00:41.40
4. Scepthan
70
00:45.41
5. Quadratic289
61
00:46.16
6. lizardyi 00:46.32
7. kennethaw88
142
00:46.67
8. keehaag
139
00:46.70
9. beatrixwashere
97
00:54.34
10. Siloam 00:57.48
11. Piotr Maciejowski
29
01:01.34
12. Dorice
238
01:05.17
13. ScorpionMax 01:11.98
14. qobi
221
01:27.83
15. zznxxxbl 01:32.62
16. Ontonator 01:35.40
17. Ariadna
22
01:40.60
18. why00 01:58.79
19. ChiefOsceola 02:01.01
20. LeonardMic 02:03.98
This Week
1. kennethaw88
142
00:50.24
2. beatrixwashere
97
00:54.34
3. ThePipeline
66
00:56.77
4. ScorpionMax 01:20.74
5. Ontonator 01:35.40
6. qobi
221
02:22.71
7. Solander
55
03:58.73
8. Zerozeddy1
69
4d 04:25:59.90
9. Uthor 24d 20:31:23.64
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Today
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MO3
1. numbrr
289
00:24.66
2. daanbe
213
00:26.75
3. vowels
214
00:28.74
4. Make
268
00:28.82
5. haramey
228
00:35.20
6. ypw19
74
00:36.55
7. Ailurus
172
00:40.32
8. Noridice
104
00:42.98
9. SilverHawk
205
00:44.35
10. PeachClobbers
156
00:45.87
AO5
1. daanbe
213
00:27.57
2. Make
268
00:28.93
3. numbrr
289
00:29.18
4. vowels
214
00:29.53
5. haramey
228
00:35.20
6. ypw19
74
00:37.40
7. Ailurus
172
00:40.85
8. Noridice
104
00:44.52
9. PeachClobbers
156
00:46.90
10. AGecko
72
00:47.79
AO12
1. daanbe
213
00:31.99
2. vowels
214
00:32.70
3. Make
268
00:34.98
4. numbrr
289
00:35.49
5. haramey
228
00:42.16
6. Ailurus
172
00:45.41
7. Noridice
104
00:48.66
8. PeachClobbers
156
00:49.58
9. SilverHawk
205
00:51.46
10. ypw19
74
00:52.53
Robots / programmatic solversinfo  
1.windex42-robot
1
00:00.576
2.Paul Bismuth
1
00:13.070
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* 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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2025-05-02 04:56:47

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