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. gtkrouwel
128
00:45.37
2. TomGuo
149
01:05.79
3. lookchin 01:16.03
4. LemonSherbet 01:33.33
5. xenicat
131
01:43.68
6. Chaojie Fu
69
01:44.06
7. Goomy
125
01:50.69
8. Froerto3301
17
01:51.03
9. niqnna
18
01:53.17
10. Wangxuye 01:53.76
11. sphericaltofu
39
01:53.91
12. wamfly
19
02:14.16
13. HackMan
116
02:25.04
14. Dorice
253
02:30.45
15. Praktisix
111
02:30.90
16. 山重水复
17
02:36.64
17. Fred522 02:37.75
18. stevethesquid
67
02:39.03
19. wellwhynot
70
02:50.67
20. kkyareuk
33
02:51.40
This Week
1. TomGuo
149
01:05.81
2. LemonSherbet 01:33.33
3. Chaojie Fu
69
01:44.06
4. Froerto3301
17
01:51.03
5. sphericaltofu
39
01:53.91
6. xenicat
131
01:55.34
7. Praktisix
111
02:30.90
8. 山重水复
17
02:36.64
9. stevethesquid
67
02:39.03
10. niqnna
18
02:39.96
11. wellwhynot
70
04:06.31
12. jessicazzzzz 04:31.74
13. BlueBumblebee
7
08:34.70
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Today
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MO3
1. numbrr
301
00:46.10
2. TashiroMiraki
217
00:47.55
3. gtkrouwel
128
00:50.53
4. sfumato
166
01:01.21
5. qqwref
261
01:05.62
6. Yeti
121
01:06.28
7. Nick
217
01:07.31
8. mtanzer
140
01:10.95
9. 2015YINJ02
167
01:12.11
10. summernight
222
01:12.70
AO5
1. numbrr
301
00:46.10
2. TashiroMiraki
217
00:51.06
3. gtkrouwel
128
00:52.82
4. Yeti
121
01:07.43
5. sfumato
166
01:08.37
6. mtanzer
140
01:11.61
7. qqwref
261
01:13.56
8. summernight
222
01:14.94
9. 2015YINJ02
167
01:15.93
10. Oryn
158
01:16.78
AO12
1. numbrr
301
00:55.85
2. gtkrouwel
128
00:56.02
3. TashiroMiraki
217
00:56.88
4. summernight
222
01:19.65
5. qqwref
261
01:23.77
6. Oryn
158
01:24.66
7. mtanzer
140
01:25.21
8. Yeti
121
01:31.17
9. sfumato
166
01:32.17
10. 2015YINJ02
167
01:33.71
Robots / programmatic solversinfo  
1.tlstyer
134
00:00.011
2.hum@b0t
91
00:00.163
3.cheyette00:02.504

* 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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2025-11-01 04:20:04

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