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. JZE
83
00:03.18
2. Noridice
113
00:04.55
3. oshi
36
00:04.90
4. lizardyi 00:05.08
5. Frog The Toast
62
00:05.38
6. Solander
60
00:07.43
7. Dorice
242
00:07.75
8. batputz5 00:07.77
9. hammerhead20 00:07.86
10. SlugBugBlue 00:08.11
11. KlunkyDoo 00:08.14
12. jasonjtch 00:08.88
13. AnonyMinor
52
00:09.09
14. Maelwys 00:09.34
15. iiiiiiii99yuan 00:09.76
16. HackMan
108
00:10.02
17. crema
172
00:10.48
18. qobi
227
00:10.89
19. LeonardMic 00:12.01
20. Hedran
79
00:12.14
This Week
1. Solander
60
00:09.46
2. HackMan
108
00:11.37
3. LeonardMic 00:12.01
4. gabobr
40
00:13.80
5. yzwy123
26
00:16.69
6. FunAcroFly
76
00:18.13
7. Bob78164 00:19.20
8. rusowo 00:19.82
9. cc
3
00:21.77
10. Jananana
16
00:23.40
11. shangdou
25
00:23.77
12. gridlock 00:26.54
13. 这个有解吗
3
00:31.28
14. beardedfoot
17
00:33.11
15. MysticalLioness
30
00:34.73
16. iv3chofi 00:35.97
17. Landry Moroz
39
00:37.27
18. BearFromTheSea 00:38.56
19. LSQUAREDMATH
28
00:47.51
20. caponata 00:53.83
Today
1. beardedfoot
17
00:33.11
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MO3
1. jaybrainer
238
00:02.52
2. numbrr
297
00:03.15
3.anonymous
30
00:03.17
4. vowels
216
00:03.56
5. haramey
230
00:03.78
6. JZE
83
00:03.92
7. ThePipeline
85
00:03.99
8. Ailurus
176
00:04.06
9. daanbe
215
00:04.07
10. boru
103
00:04.13
AO5
1. jaybrainer
238
00:02.71
2. numbrr
297
00:03.55
3. vowels
216
00:03.56
4.anonymous
30
00:03.70
5. daanbe
215
00:03.96
6. ThePipeline
85
00:04.21
7. haramey
230
00:04.26
8. JZE
83
00:04.38
9. Ailurus
176
00:04.47
10. boru
103
00:04.52
AO12
1. jaybrainer
238
00:03.41
2. numbrr
297
00:03.84
3. vowels
216
00:03.99
4.anonymous
30
00:04.20
5. daanbe
215
00:04.32
6. ThePipeline
85
00:04.36
7. haramey
230
00:04.67
8. Ailurus
176
00:04.88
9. Make
273
00:05.00
10. Frog The Toast
62
00:05.24
Robots / programmatic solversinfo  
1.beatrixwashere
104
00:00.259
2.windex42-robot
1
00:00.304
3.occultations
6
00:00.643

* 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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2025-07-19 14:44:29

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