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. Noridice
130
01:48.18
2. AGecko
76
02:21.99
3. darjien 03:11.59
4. AnonyMinor
58
03:54.63
5. beatrixwashere
109
03:56.13
6. sideshow
131
04:12.38
7. acl68
54
04:49.53
8. Wuni14 04:57.57
9. qobi
230
04:59.69
10. Ariadna
26
05:15.59
11. NaluXV1 05:29.47
12. sporg 06:11.25
13. beardedfoot
17
06:12.48
14. Camdycorn 06:13.22
15. clare169 08:42.02
16. CaptainBen 11:08.01
17. slyguy519
55
14:03.12
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This Week
1. Noridice
130
01:48.18
2. AGecko
76
02:21.99
3. AnonyMinor
58
03:54.63
4. acl68
54
04:52.47
5. Wuni14 04:57.57
6. sideshow
131
05:18.15
7. NaluXV1 05:29.47
8. Camdycorn 06:13.22
9. beardedfoot
17
09:19.91
10. slyguy519
55
14:03.12
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Today
1. AnonyMinor
58
03:54.63
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MO3
1. Puzzler3
51
01:39.01
2. Deglis
53
01:41.50
3. daanbe
216
01:43.61
4. ThePipeline
86
01:50.53
5. vowels
216
01:53.99
6. Noridice
130
01:55.34
7. Frog The Toast
65
01:55.82
8. haramey
231
01:58.46
9. numbrr
300
01:59.07
10.anonymous
90
02:02.64
AO5
1. daanbe
216
01:45.53
2. Deglis
53
01:45.61
3. Puzzler3
51
01:51.15
4. vowels
216
01:55.51
5. Frog The Toast
65
01:57.37
6. Noridice
130
02:00.11
7. haramey
231
02:03.36
8. ThePipeline
86
02:05.73
9.anonymous
90
02:06.59
10. numbrr
300
02:07.70
AO12
1. Deglis
53
01:54.12
2. daanbe
216
01:54.46
3. vowels
216
02:02.02
4. Noridice
130
02:03.02
5. Frog The Toast
65
02:08.98
6.anonymous
90
02:12.81
7. ThePipeline
86
02:13.97
8. haramey
231
02:14.69
9. Make
274
02:15.74
10. Ailurus
177
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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2025-09-14 06:55:26

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