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.

Video Tutorial
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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

New Puzzle
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This Week
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Today
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MO3
1. VividBear
219
00:14.51
2. BonnyDuck
198
00:16.50
3. TooShan
187
00:27.31
4. Funkcja
155
00:42.52
5. FeistyYak
154
01:06.55
6. hiichbindermax
46
01:41.98
7. TashiroMiraki
234
01:47.36
8. gt83
143
01:55.54
9. zdz
101
02:07.40
10. dxjonas
167
02:10.35
AO5
1. BonnyDuck
198
00:24.30
2. VividBear
219
00:25.34
3. TooShan
187
00:25.38
4. hiichbindermax
46
01:46.13
5. gt83
143
01:56.47
6. TashiroMiraki
234
01:56.92
7. dxjonas
167
02:12.73
8. FeistyYak
154
02:16.72
9. summernight
241
02:19.59
10. Douglas Shamlin Jr.
724
02:23.65
AO12
1. BonnyDuck
198
00:56.22
2. TooShan
187
01:17.78
3. TashiroMiraki
234
02:04.89
4. gt83
143
02:08.48
5. dxjonas
167
02:26.96
6. summernight
241
02:34.82
7. Douglas Shamlin Jr.
724
02:42.47
8. qqwref
266
02:43.21
9. FeistyYak
154
02:45.54
10. Dust14
101
02:49.03
Robots / programmatic solversinfo  
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* 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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