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
85
00:02.92
2. Noridice
115
00:03.67
3. oshi
41
00:05.42
4. Solander
61
00:06.10
5. qobi
228
00:07.22
6. pouldu
106
00:07.31
7. Dorice
242
00:08.33
8. CroMa
58
00:08.75
9. AnonyMinor
53
00:10.45
10. Donopi
11
00:10.70
11. llmt9
83
00:10.83
12. HackMan
110
00:11.55
13. scheyette
11
00:11.74
14. gabobr
41
00:11.94
15. FunAcroFly
77
00:13.06
16. wyq97 00:13.11
17. nathania 00:14.31
18. doctorbutterfly
11
00:16.24
19. shangdou
25
00:16.53
20. sixela0132
9
00:20.14
This Week
1. qobi
228
00:07.22
2. pouldu
106
00:07.31
3. gabobr
41
00:11.97
4. FunAcroFly
77
00:13.06
5. sixela0132
9
00:20.14
6. Qayushi
3
00:24.98
7. easli
58
00:30.78
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Today
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MO3
1. numbrr
298
00:03.03
2. vowels
216
00:03.06
3. jaybrainer
239
00:03.08
4. JZE
85
00:03.69
5. haramey
230
00:03.70
6.anonymous
30
00:03.75
7. daanbe
215
00:03.92
8. Make
273
00:03.99
9. Ailurus
176
00:04.05
10. ThePipeline
85
00:04.08
AO5
1. numbrr
298
00:03.22
2. vowels
216
00:03.25
3. jaybrainer
239
00:03.41
4.anonymous
30
00:03.68
5. haramey
230
00:03.77
6. JZE
85
00:04.02
7. daanbe
215
00:04.04
8. Ailurus
176
00:04.24
9. ThePipeline
85
00:04.27
10. Make
273
00:04.61
AO12
1. numbrr
298
00:03.49
2. vowels
216
00:03.80
3. jaybrainer
239
00:03.92
4. haramey
230
00:04.30
5. ThePipeline
85
00:04.55
6. daanbe
215
00:04.58
7.anonymous
30
00:04.81
8. Ailurus
176
00:04.98
9. vx14
148
00:05.16
10. Deglis
46
00:05.25
Robots / programmatic solversinfo  
1.windex42-robot
1
00:00.296
2.Paul Bismuth
1
00:02.730
3.ruiya2000
1
00:12.010

* 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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2025-07-30 00:11:06

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