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
This Month
1. ypw19
90
00:51.47
2. Sonar
82
00:56.40
3. JiangGe 00:56.62
4. TomGuo
152
00:56.86
5. zenzaburo 00:57.57
6. Brian Murphy
115
01:05.08
7. beatrixwashere
115
01:15.09
8. Fishburger 01:17.38
9. Harry_Canyon
137
01:19.18
10. xxbh02jf 01:19.93
11. keehaag
166
01:21.16
12. Ontwikseltsaar
102
01:21.18
13. Dorice
264
01:25.12
14. BernadetteL 01:27.47
15. seb00066
95
01:31.35
16. Ryong L
79
01:31.81
17. SophieK
56
01:37.89
18. Toksku 01:38.95
19. pipifax 01:39.55
20. ScoutDad 01:41.09
This Week
1. zenzaburo 01:01.05
2. TomGuo
152
01:10.93
3. beatrixwashere
115
01:15.09
4. Harry_Canyon
137
01:27.28
5. BernadetteL 01:36.05
6. pipifax 01:40.19
7. Dorice
264
01:43.20
8. Ryong L
79
01:46.63
9. niqnna
18
01:47.40
10. peeps469
13
01:58.54
11. seb00066
95
01:59.69
12. JanJaeger 02:03.68
13. danpuzzler 02:46.73
14. ambiorix 02:59.78
15. Kenolo353
120
03:00.91
16. Goochelaar
107
03:03.94
17. Blechli
14
03:14.69
18. grimmgirlfandom
169
03:17.77
19. pbsl
45
04:23.86
20. Aimar
25
04:30.12
Today
1. Dorice
264
01:43.20
2. seb00066
95
01:59.69
3. Aimar
25
04:30.12
4. chrispy
74
06:17.18
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
309
00:36.81
2. TashiroMiraki
221
00:41.81
3. Sonar
82
00:45.80
3. gtkrouwel
134
00:45.80
5. sfumato
166
00:48.33
6. qqwref
266
00:49.53
7. sauceguardian
105
00:53.17
8. mtanzer
140
00:53.20
8. Yeti
138
00:53.20
10. Brian Murphy
115
00:56.51
AO5
1. numbrr
309
00:38.20
2. TashiroMiraki
221
00:42.42
3. gtkrouwel
134
00:46.74
4. Sonar
82
00:47.77
5. sfumato
166
00:49.21
6. qqwref
266
00:53.33
7. sauceguardian
105
00:53.95
8. Yeti
138
00:54.33
9. mtanzer
140
00:54.43
10. Brian Murphy
115
00:57.69
AO12
1. numbrr
309
00:41.32
2. TashiroMiraki
221
00:45.90
3. gtkrouwel
134
00:50.82
4. Sonar
82
00:53.12
5. sfumato
166
00:54.44
6. qqwref
266
00:57.59
7. Yeti
138
00:57.72
8. mtanzer
140
00:58.75
9. sauceguardian
105
00:59.72
10. kdu
223
01:06.12
Robots / programmatic solversinfo  
1.tlstyer
142
00:00.009
2.hum@b0t
91
00:00.163
3.cheyette00:05.661

* 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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