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
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This Week
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Today
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MO3
1.anonymous
150
00:54.68
2.anonymous
198
00:56.05
3.anonymous
215
01:19.11
4.anonymous
133
03:06.96
5. TashiroMiraki
217
03:18.84
6.anonymous
136
03:23.26
7. numbrr
301
03:46.72
8. qqwref
261
03:48.50
9. moonjady
349
03:49.71
10. gtkrouwel
128
03:50.37
AO5
1.anonymous
150
01:07.12
2.anonymous
215
01:22.87
3.anonymous
198
01:56.81
4.anonymous
133
03:06.96
5. TashiroMiraki
217
03:26.64
6. gtkrouwel
128
03:43.56
7. dxjonas
137
03:57.92
8. qqwref
261
03:58.78
9. Sonar
77
04:15.07
10. Dust14
86
04:22.86
AO12
1. TashiroMiraki
217
03:48.31
2. gtkrouwel
128
04:14.23
3. qqwref
261
04:21.80
4. dxjonas
137
04:23.33
5. Douglas Shamlin Jr.
714
04:42.48
6.anonymous
150
04:44.24
7. Dust14
86
05:03.34
8. summernight
223
05:07.28
9. highprime
122
05:22.59
10. moonjady
349
05:23.36
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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2025-11-08 20:55:45

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