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. ThePipeline
85
00:03.42
2. Noridice
111
00:04.55
3. Frog The Toast
59
00:05.38
4. lizardyi 00:05.86
5. riderdecade
38
00:06.25
6. afidaleo
131
00:06.38
7. Dorice
242
00:06.43
8. NinjaFury68
131
00:06.49
9. Solander
59
00:07.43
10. hammerhead20 00:07.77
10. batputz5 00:07.77
12. KlunkyDoo 00:08.14
13. qobi
226
00:08.31
14. SlugBugBlue 00:08.41
15. ChiefOsceola 00:09.04
16. AnonyMinor
51
00:09.09
17. JZE
82
00:09.15
18. Maelwys 00:09.34
19. iiiiiiii99yuan 00:09.76
20. HackMan
107
00:10.02
This Week
1. Frog The Toast
59
00:05.38
2. hammerhead20 00:07.96
3. SlugBugBlue 00:08.41
4. Solander
59
00:08.43
5. Dorice
242
00:08.68
6. KlunkyDoo 00:08.71
7. batputz5 00:09.06
8. AnonyMinor
51
00:09.09
9. iiiiiiii99yuan 00:09.76
10. HackMan
107
00:10.24
11. stekcuf 00:14.30
12. FunAcroFly
70
00:15.63
13. destruction321
10
00:16.16
14. Yeti
117
00:17.15
15. Tuffi
24
00:20.09
16. Asor20
31
00:21.58
17. XieErect 00:23.38
18. Nunyabizness 00:24.02
19. Mjolnir1336
41
00:27.20
20. LSQUAREDMATH
27
00:30.12
Today
1. HackMan
107
00:14.44
2. LSQUAREDMATH
27
00:38.29
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MO3
1. jaybrainer
236
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. ThePipeline
85
00:03.99
7. Ailurus
176
00:04.06
8. daanbe
215
00:04.07
9. boru
103
00:04.13
10. Frog The Toast
59
00:04.23
AO5
1. jaybrainer
236
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. Ailurus
176
00:04.47
9. boru
103
00:04.52
10. Deglis
43
00:04.56
AO12
1. jaybrainer
236
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
272
00:05.00
10. Frog The Toast
59
00:05.24
Robots / programmatic solversinfo  
1.beatrixwashere
102
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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2025-07-05 18:09:38

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