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.Hachiman 01:02.16
2.tt1029
144
01:02.49
3.Billo93 01:04.63
4.highprime
163
01:07.15
5.iovichulo413
58
01:07.28
6.zenzaburo 01:11.57
7.飞飞
55
01:16.33
8.Hesper
101
01:17.86
9.DdBbon 01:19.45
10.Oryn
202
01:19.46
11.Limax 01:22.64
12.kennethaw88
167
01:25.66
13.Bonnenuit 01:25.69
14.baimouren
103
01:26.56
15.wldnekz1 01:26.57
16.Jananana
64
01:27.90
17.Froerto3301
50
01:29.63
18.bsk5941
124
01:34.46
19.SuaveGeyser
45
01:34.79
20.Thrillhou
21
01:35.45
This Week
1.tt1029
144
01:02.49
2.highprime
163
01:07.15
3.zenzaburo 01:14.95
4.iovichulo413
58
01:17.83
5.wldnekz1 01:26.57
6.nbapip 01:38.91
7.Thrillhou
21
01:47.19
8.kanon
60
01:48.75
9.niqnna
18
01:50.29
10.bsk5941
124
01:58.93
11.Cerine 02:07.44
12.hiptopoker 02:41.30
13.Hearthcore 02:50.00
14.xilli 03:19.99
15.999111 03:43.17
16.oulamoula
20
04:11.51
17.NanogramFreak 04:35.99
18.CrlD
124
04:46.57
19.carukh 04:54.81
20.creesa
32
05:00.87
Today
1.tt1029
144
01:12.63
2.Hearthcore 02:50.00
3.PhilDiggety 05:03.90
4.Chronodrax
34
09:09.43
5.QuaintStorm2
6
12:48:32.77
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
331
00:50.09
2.TashiroMiraki
234
00:51.08
3.gt83
144
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
331
00:53.75
2.TashiroMiraki
234
00:53.76
3.gt83
144
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
331
01:02.65
2.gt83
144
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
161
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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