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. TomGuo
152
00:52.68
2. tt1029
116
00:58.34
3. zenzaburo 01:00.33
4. Dorice
264
01:26.78
5. Ontwikseltsaar
97
01:32.09
6. lookchin 01:34.13
7. Froerto3301
41
01:35.14
8. FCBSophie
68
01:54.94
9. niqnna
18
02:07.55
10. AnonyMinor
74
02:11.24
11. HackMan
122
02:14.69
12. Amator 02:20.87
13. Methyl Red
12
02:21.03
14. trLBumm
32
02:24.17
15. Praktisix
123
02:29.33
16. ScoutDad 02:36.09
17. angelrose971
96
02:40.17
18. Strider500
104
02:41.22
19. Rhododendron
149
02:41.79
20. SophieK
53
02:43.59
This Week
1. tt1029
116
00:58.34
2. zenzaburo 01:00.59
3. Dorice
264
01:26.78
4. Ontwikseltsaar
97
01:32.09
5. Amator 02:20.87
6. SophieK
53
02:43.59
7. Praktisix
123
02:48.69
8. Strider500
104
03:19.90
9. xilli 03:57.42
10. AnonyMinor
74
04:20.18
11. Koakuma
52
05:06.08
12. skinnerkw
10
07:18.15
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Today
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MO3
1. numbrr
308
00:46.10
2. TashiroMiraki
219
00:47.55
3. gtkrouwel
133
00:48.99
4. sfumato
166
01:01.21
5. qqwref
266
01:05.62
6. Yeti
137
01:06.28
7. Nick
217
01:07.31
8. mtanzer
140
01:10.95
9. tt1029
116
01:11.99
10. 2015YINJ02
177
01:12.11
AO5
1. numbrr
308
00:46.10
2. TashiroMiraki
219
00:51.06
3. gtkrouwel
133
00:52.43
4. Yeti
137
01:07.43
5. sfumato
166
01:08.37
6. mtanzer
140
01:11.61
7. qqwref
266
01:13.56
8. tt1029
116
01:13.91
9. summernight
230
01:14.94
10. 2015YINJ02
177
01:15.93
AO12
1. numbrr
308
00:55.85
2. gtkrouwel
133
00:56.02
3. TashiroMiraki
219
00:56.88
4. summernight
230
01:19.65
5. qqwref
266
01:23.77
6. Oryn
169
01:24.66
7. mtanzer
140
01:25.21
8. Yeti
137
01:31.17
9. sfumato
166
01:32.17
10. 2015YINJ02
177
01:33.71
Robots / programmatic solversinfo  
1.tlstyer
141
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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2026-03-05 06:57:19

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