Light Up


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Light Up (Akari) is a logic puzzle with simple rules and challenging solutions.

The rules are simple.Light Up is played on a rectangular grid. The grid has both black cells and white cells in it. The objective is to place light bulbs on the grid so that every white square is lit. A cell is illuminated by a light bulb if they're in the same row or column, and if there are no black cells between them. Also, no light bulb may illuminate another light bulb.
Some of the black cells have numbers in them. A number in a black cell indicates how many light bulbs share an edge with that cell.
Left click a square to place a light bulb. Right click to mark with X.

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Light Up


7x7 Easy Light Up | 7x7 Normal Light Up | 7x7 Hard Light Up | 10x10 Easy Light Up | 10x10 Normal Light Up | 10x10 Hard Light Up | 14x14 Easy Light Up | 14x14 Normal Light Up | 14x14 Hard Light Up | 25x25 Easy Light Up | 25x25 Normal Light Up | 25x25 Hard Light Up

This Month
1. LemonSherbet 00:19.23
2. crema
184
00:20.45
3. Eskimosnake
108
00:22.75
4. Dorice
246
00:23.07
5. Jorgito Salles
31
00:25.39
6. nerdvert
91
00:25.42
7. SelenaStormeye 00:34.11
8. angelrose971
94
00:34.66
9. thrasymachus
31
00:34.96
10. SophieK
41
00:35.59
11. Dovuq 00:35.83
12. niqnna
18
00:38.79
13. takaz 00:39.98
14. Rhododendron
137
00:40.67
15. AnonyMinor
56
00:45.77
16. CapitanCaguama 00:49.10
17. LockedKey
76
00:49.92
18. boobooUK82 00:52.20
19. Goochelaar
105
00:53.28
20. shangdou
26
00:55.36
This Week
1. crema
184
00:20.45
2. nerdvert
91
00:25.42
3. Dorice
246
00:29.33
4. SelenaStormeye 00:34.11
5. niqnna
18
00:38.79
6. Goochelaar
105
00:53.28
7. CapitanCaguama 00:57.41
8. ambiorix 01:10.58
9. Kailo
31
01:15.51
10. EG0hun 01:25.74
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Today
1. SelenaStormeye 00:34.11
2. niqnna
18
00:39.24
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MO3
1. numbrr
300
00:11.07
2. mtanzer
140
00:13.41
3. TashiroMiraki
216
00:14.07
4. sfumato
166
00:15.17
5. Oryn
152
00:16.33
6. gtkrouwel
121
00:18.34
7. 2015YINJ02
159
00:19.38
8. Nick
217
00:19.85
9. qqwref
260
00:19.95
10. summernight
214
00:20.25
AO5
1. numbrr
300
00:12.09
2. TashiroMiraki
216
00:14.69
3. mtanzer
140
00:15.42
4. sfumato
166
00:15.52
5. Oryn
152
00:17.99
6. gtkrouwel
121
00:19.27
7. mmyama
78
00:20.09
8. qqwref
260
00:20.14
9. 2015YINJ02
159
00:20.18
10. tantanaaa
77
00:20.33
AO12
1. numbrr
300
00:15.43
2. mtanzer
140
00:17.29
3. TashiroMiraki
216
00:18.02
4. gtkrouwel
121
00:20.17
5. sfumato
166
00:20.39
6. qqwref
260
00:23.33
7. Nick
217
00:24.51
8. summernight
214
00:24.76
9. Oryn
152
00:25.51
10. crascodyllea
142
00:25.75
Robots / programmatic solversinfo  
1.tlstyer
126
00:00.007
2.hum@b0t
91
00:00.164
3.cheyette00:00.356

* 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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2025-08-30 17:20:20

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