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
196
00:16.50
2.anonymous
212
00:47.53
3.anonymous
129
01:30.74
4. TashiroMiraki
215
01:47.36
5. gtkrouwel
117
02:04.26
6. dxjonas
127
02:10.35
7. Douglas Shamlin Jr.
692
02:17.35
8. Dust14
80
02:17.43
9. Sonar
77
02:23.01
10. tantanaaa
70
02:24.46
AO5
1.anonymous
196
00:24.30
2.anonymous
212
01:27.40
3.anonymous
129
01:31.67
4. TashiroMiraki
215
01:56.92
5. gtkrouwel
117
02:04.58
6. dxjonas
127
02:20.67
7. Dust14
80
02:25.31
8. tantanaaa
70
02:31.88
9. qqwref
259
02:34.81
10. Sonar
77
02:36.20
AO12
1.anonymous
196
00:56.22
2. TashiroMiraki
215
02:04.89
3. gtkrouwel
117
02:18.40
4. dxjonas
127
02:36.51
5. qqwref
259
02:43.21
6. Dust14
80
02:49.03
7. Sonar
77
02:50.23
8. Douglas Shamlin Jr.
692
02:58.83
9. crascodyllea
141
03:01.08
10. summernight
209
03:02.25
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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2025-07-01 02:39:00

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