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 00:18.94
2. Wangxuye 00:20.24
3. Dorice
253
00:20.94
4. niqnna
18
00:21.09
5. xenicat
131
00:22.25
6. nerdvert
95
00:31.23
7. Chaojie Fu
69
00:31.74
8. stevethesquid
67
00:38.58
9. HackMan
116
00:38.98
10. Ermouf
95
00:46.35
11. 山重水复
21
00:47.23
12. lyr1s
17
00:49.51
13. fishysua
152
00:50.70
14. sloppc1 00:54.54
15. randomflyintaco
130
00:56.93
16. ambiorix 00:58.53
17. yosiaki
100
01:02.15
18. 54kangxi
57
01:03.44
19. Sensei100000
11
01:14.26
20. Toksku 01:18.03
This Week
1. LemonSherbet 00:18.94
2. niqnna
18
00:25.73
3. nerdvert
95
00:31.23
4. Sensei100000
11
01:14.26
5. Toksku 01:18.03
6. EG0hun 01:57.15
7. PeeinPotty 03:03.12
8. FunAcroFly
104
03:12.18
9. NaluXV1 04:44.26
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Today
1. niqnna
18
00:34.98
2. Sensei100000
11
01:14.26
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MO3
1. numbrr
301
00:11.07
2. mtanzer
140
00:13.41
3. gtkrouwel
128
00:14.04
4. TashiroMiraki
217
00:14.07
5. sfumato
166
00:15.17
6. Oryn
159
00:16.33
7. 2015YINJ02
169
00:19.38
8. Nick
217
00:19.85
9. qqwref
261
00:19.95
10. summernight
223
00:20.25
AO5
1. numbrr
301
00:12.09
2. gtkrouwel
128
00:13.18
3. TashiroMiraki
217
00:14.69
4. mtanzer
140
00:15.42
5. sfumato
166
00:15.52
6. Oryn
159
00:17.99
7. mmyama
79
00:20.09
8. qqwref
261
00:20.14
9. 2015YINJ02
169
00:20.18
10. tantanaaa
85
00:20.33
AO12
1. numbrr
301
00:15.43
2. gtkrouwel
128
00:16.27
3. mtanzer
140
00:17.29
4. TashiroMiraki
217
00:18.02
5. sfumato
166
00:20.39
6. qqwref
261
00:23.33
7. Nick
217
00:24.51
8. summernight
223
00:24.76
9. Oryn
159
00:25.51
10. crascodyllea
146
00:25.75
Robots / programmatic solversinfo  
1.tlstyer
135
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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2025-11-08 07:34:53

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