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

New Puzzle
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This Week
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Today
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MO3
1.anonymous
170
00:54.68
2.anonymous
198
00:56.05
3.anonymous
217
01:19.11
4. hiichbindermax
41
02:52.21
5.anonymous
142
03:06.96
6. gtkrouwel
135
03:16.31
7. TashiroMiraki
224
03:18.84
8.anonymous
145
03:23.26
9. Douglas Shamlin Jr.
719
03:29.88
10. Firscir
83
03:30.85
AO5
1.anonymous
170
01:07.12
2.anonymous
217
01:22.87
3.anonymous
198
01:56.81
4.anonymous
142
03:06.96
5. gtkrouwel
135
03:17.48
6. TashiroMiraki
224
03:26.64
7. Douglas Shamlin Jr.
719
03:47.55
8. Thomas Garner
174
03:54.83
9. dxjonas
150
03:57.92
10. qqwref
266
03:58.78
AO12
1.anonymous
217
03:33.33
2. TashiroMiraki
224
03:48.31
3. gtkrouwel
135
03:55.93
4. dxjonas
150
04:12.04
5. Douglas Shamlin Jr.
719
04:13.19
6. qqwref
266
04:21.80
7. Thomas Garner
174
04:30.54
8. summernight
232
04:43.30
9.anonymous
170
04:44.24
10. Dust14
93
05:03.34
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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