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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14. AnonyMinor
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15. doctorbutterfly
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70
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41
00:16.37
18. fabios4600
23
00:18.31
19. SirYupp
37
00:19.28
20. Mailman 00:19.70
This Week
1. HackMan
107
00:10.21
2. scheyette
10
00:11.74
3. AnonyMinor
51
00:12.49
4. doctorbutterfly
4
00:16.24
5. drbop
41
00:16.37
6. FunAcroFly
70
00:19.23
7. azarmadr
15
00:25.60
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MO3
1. numbrr
297
00:03.03
2. vowels
216
00:03.06
3. jaybrainer
236
00:03.08
4. haramey
230
00:03.70
5.anonymous
30
00:03.75
6. daanbe
215
00:03.92
7. Make
272
00:03.99
8. Ailurus
176
00:04.05
9. ThePipeline
85
00:04.08
10. Frog The Toast
59
00:04.52
AO5
1. numbrr
297
00:03.22
2. vowels
216
00:03.25
3. jaybrainer
236
00:03.41
4.anonymous
30
00:03.68
5. haramey
230
00:03.77
6. daanbe
215
00:04.04
7. Ailurus
176
00:04.24
8. ThePipeline
85
00:04.27
9. Make
272
00:04.61
10. Frog The Toast
59
00:04.83
AO12
1. numbrr
297
00:03.49
2. vowels
216
00:03.80
3. jaybrainer
236
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
43
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.
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2025-07-05 17:40:25

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