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. Oryn
192
00:04.02
2. sauceguardian
117
00:04.83
3. zenzaburo 00:05.43
4. Altrik 00:06.68
5. grimmgirlfandom
175
00:06.82
6. niqnna
18
00:07.09
7. JiangGe 00:07.31
8. kennethaw88
162
00:07.97
9. ojyojyojy
58
00:08.54
10. Meerkat
218
00:08.77
11. syhew
3
00:09.10
12. Toksku 00:10.55
13. boiboi7788 00:10.85
14. pipifax 00:10.88
15. jacson
7
00:10.89
16. Tuffi
36
00:11.57
17. JiangSuiKitJack 00:12.07
18. Ledorian01
31
00:12.14
19. HackMan
126
00:12.55
20. Scr33n 00:12.64
This Week
1. Altrik 00:06.68
2. niqnna
18
00:08.17
3. zenzaburo 00:08.52
4. Meerkat
218
00:08.77
5. syhew
3
00:09.10
6. jacson
7
00:10.89
7. JiangSuiKitJack 00:12.07
8. pipifax 00:15.78
9. HackMan
126
00:16.77
10. justAboy
38
00:22.62
11. Emfine
84
00:27.48
12. AndyHu
12
00:38.30
13. ambiorix 00:39.41
14. chrispy
85
00:40.54
15. zifeiyu
11
00:59.71
16. Dimahack 01:14.85
17. Pegaso58 05:12.94
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. zenzaburo 00:10.71
2. JiangSuiKitJack 00:27.24
3. chrispy
85
00:40.54
4.--- empty -----:--
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
325
00:04.21
2. Yeti
143
00:05.19
3. vowels
216
00:05.21
4. mtanzer
140
00:05.22
5. Arok
115
00:05.24
6. gt83
141
00:05.36
7. Oryn
192
00:05.38
8. sfumato
168
00:05.44
9. sauceguardian
117
00:05.81
10. TashiroMiraki
233
00:05.91
AO5
1. numbrr
325
00:04.76
2. gt83
141
00:05.49
3. Oryn
192
00:05.63
4. Yeti
143
00:05.87
5. mtanzer
140
00:05.96
6. sfumato
168
00:06.02
7. Arok
115
00:06.06
8. TashiroMiraki
233
00:06.18
9. sauceguardian
117
00:06.20
10. 2015YINJ02
187
00:06.23
AO12
1. numbrr
325
00:05.38
2. Yeti
143
00:06.20
3. gt83
141
00:06.29
4. sfumato
168
00:06.43
5. Oryn
192
00:06.69
6. mtanzer
140
00:06.94
6. Arok
115
00:06.94
8. TashiroMiraki
233
00:07.08
9. sauceguardian
117
00:07.10
10. qqwref
266
00:07.20
Robots / programmatic solversinfo  
1.tlstyer
154
00:00.006
2.siebi
1
00:00.007
3.cheyette00:00.141

* 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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