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. zenzaburo 00:16.81
2. Theck
31
00:19.65
3. Zangzihan 00:23.08
4. DuckGo 00:25.39
5. niqnna
18
00:25.67
6. kennethaw88
159
00:29.04
7. grimmgirlfandom
173
00:29.64
8. Koakuma
54
00:30.51
9. Emzed
83
00:30.76
10. PaniOlga 00:32.74
11. maxmoor 00:34.41
12. llmt9
100
00:36.75
13. MatiZ1994
11
00:36.92
14. ojyojyojy
46
00:39.17
15. SophieK
60
00:43.25
16. takaz 00:43.60
17. Japdo
2
00:44.62
18. HerrNoix 00:45.77
19. FunAcroFly
139
00:47.03
20. MARTIN1979
101
00:49.12
This Week
1. Theck
31
00:19.65
2. zenzaburo 00:21.86
3. DuckGo 00:25.39
4. niqnna
18
00:27.38
5. grimmgirlfandom
173
00:29.64
6. Koakuma
54
00:30.51
7. maxmoor 00:34.41
8. llmt9
100
00:36.75
9. takaz 00:43.60
10. Emfine
77
01:22.36
11. Yunteacher
45
01:36.30
12. tsukishiro21
15
01:41.62
13. jxycxlyn 02:37.35
14. huohuo2004
42
06:17.75
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Today
1. niqnna
18
00:35.44
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MO3
1. numbrr
321
00:12.77
2. TashiroMiraki
230
00:14.96
3. gtkrouwel
138
00:16.28
4. Klunk
24
00:17.36
5. mtanzer
140
00:18.21
6. sfumato
168
00:20.43
7. Yeti
142
00:20.45
8. Nick
217
00:21.19
9. Oryn
181
00:21.39
10. goodman15
65
00:21.64
AO5
1. numbrr
321
00:14.36
2. TashiroMiraki
230
00:15.81
3. gtkrouwel
138
00:16.52
4. mtanzer
140
00:19.33
5. Yeti
142
00:19.59
6. Oryn
181
00:21.78
7. sfumato
168
00:22.39
8. Nick
217
00:23.23
9. goodman15
65
00:24.61
10. Yonatan Yarhi
72
00:25.89
AO12
1. numbrr
321
00:17.12
2. TashiroMiraki
230
00:17.29
3. gtkrouwel
138
00:19.99
4. Yeti
142
00:25.01
5. goodman15
65
00:27.90
6. Oryn
181
00:28.67
7. mtanzer
140
00:29.15
8. qqwref
266
00:29.59
9. Yonatan Yarhi
72
00:30.12
10. summernight
237
00:32.05
Robots / programmatic solversinfo  
1.tlstyer
151
00:00.008
2.hum@b0t
91
00:00.165
3.cheyette00:00.239

* 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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