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
This Month
1.tt1029
143
01:02.82
2.Hachiman 01:03.56
3.Billo93 01:04.63
4.iovichulo413
58
01:05.39
5.zenzaburo 01:11.57
6.highprime
161
01:12.38
7.Rudy4209
50
01:14.56
8.飞飞
55
01:16.33
9.Hesper
101
01:17.86
10.DdBbon 01:19.45
11.Limax 01:22.64
12.kennethaw88
165
01:25.66
13.Jananana
63
01:26.53
14.baimouren
102
01:26.56
15.Froerto3301
50
01:29.63
16.erichiro 01:32.80
17.Thrillhou
20
01:34.08
18.SuaveGeyser
44
01:34.79
19.Aysha
115
01:35.88
20.geyik
229
01:37.98
This Week
1.tt1029
143
01:02.82
2.Billo93 01:04.63
3.iovichulo413
58
01:07.28
4.zenzaburo 01:11.57
5.highprime
161
01:40.38
6.bsk5941
121
01:42.15
7.Hesper
101
01:43.68
8.kennethaw88
165
01:51.98
9.Thrillhou
20
01:56.09
10.Danila54RUS 02:15.38
11.batiko 02:19.30
12.Wenmylii
12
02:25.44
13.Cerine 02:27.36
14.LesAM 02:38.18
15.Duqcs
16
02:54.29
16.Nezzi
23
03:10.75
17.CrlD
124
03:18.89
18.Kelizo
48
03:21.35
19.snekle
27
03:23.65
20.장동화
21
03:26.54
Today
1.Kelizo
48
08:12.75
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MO3
1.numbrr
329
00:50.09
2.TashiroMiraki
234
00:51.08
3.gt83
143
00:53.56
4.강일출
187
01:02.56
5.Mark M.
118
01:02.66
6.sfumato
170
01:02.97
7.Yeti
143
01:04.76
8.Moooon
139
01:06.76
9.Thomas Garner
181
01:07.35
10.mtanzer
140
01:08.67
AO5
1.numbrr
329
00:53.75
2.TashiroMiraki
234
00:53.76
3.gt83
143
00:57.45
4.Mark M.
118
01:05.59
5.강일출
187
01:07.85
6.Yeti
143
01:08.42
7.mtanzer
140
01:09.99
8.Thomas Garner
181
01:11.20
9.Moooon
139
01:14.07
10.Klunk
24
01:15.24
AO12
1.numbrr
329
01:02.65
2.gt83
143
01:03.90
3.TashiroMiraki
234
01:11.46
4.Yeti
143
01:16.88
5.Thomas Garner
181
01:23.14
6.강일출
187
01:24.51
7.Moooon
139
01:24.74
8.Mark M.
118
01:25.52
9.mtanzer
140
01:26.99
10.dxjonas
167
01:29.41
Robots / programmatic solversinfo  
1.tlstyer
158
00:00.014
2.siebi
1
00:00.038
3.GrandMole
91
00:00.169

* 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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