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 00:15.80
2. BeccaWorm
129
00:17.35
3. niqnna
18
00:18.17
4. Zangzihan 00:21.25
5. Dorice
269
00:21.34
6. grimmgirlfandom
171
00:21.54
7. SWICT
59
00:23.14
8. crema
271
00:23.21
9. pipifax 00:23.91
10. kennethaw88
156
00:26.40
11. tege20
30
00:26.68
12. KETJAK
39
00:26.80
13. JanJaeger
24
00:28.72
14. -Jason-
28
00:30.43
15. qobi
237
00:33.35
16. monjo 00:33.78
17. dprince29 00:34.39
18. AnonyMinor
82
00:35.54
19. LordHedgie
5
00:35.92
20. cuizhans
21
00:37.52
This Week
1. zenzaburo 00:16.01
2. niqnna
18
00:19.74
3. Zangzihan 00:21.25
4. tege20
30
00:26.68
5. KETJAK
39
00:26.80
6. -Jason-
28
00:30.43
7. qobi
237
00:33.35
8. cuizhans
21
00:37.52
9. daisyisaflower
1
00:38.22
10. Kwikkel 00:50.55
11. Limpan0908
1
01:01.02
12. pipifax 01:01.97
13. ambiorix 01:05.57
14. Nebbo 01:07.11
15. chrispy
78
01:12.99
16. Langrace
3
01:15.43
17. ojyojyojy
35
01:27.70
18. AstroNovalite
34
01:40.36
19. EmeryEmery
8
02:53.59
20. Efran
50
04:53.25
Today
1. niqnna
18
00:19.74
2. Zangzihan 00:21.86
3.--- empty -----:--
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6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
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20.--- empty -----:--
MO3
1. numbrr
320
00:10.40
2. mtanzer
140
00:12.14
3. sfumato
168
00:12.30
4. TashiroMiraki
227
00:12.95
5. Yeti
140
00:13.27
6. gtkrouwel
135
00:13.35
7. Oryn
178
00:13.36
8. vowels
216
00:14.15
9. sauceguardian
106
00:14.22
10. Arok
115
00:14.35
AO5
1. numbrr
320
00:11.18
2. sfumato
168
00:12.81
3. gtkrouwel
135
00:13.10
4. Yeti
140
00:13.68
5. TashiroMiraki
227
00:13.72
6. Oryn
178
00:13.82
7. mtanzer
140
00:14.07
8. qqwref
266
00:14.60
9. sauceguardian
106
00:14.79
10. Nick
217
00:15.32
AO12
1. numbrr
320
00:12.54
2. gtkrouwel
135
00:14.18
3. TashiroMiraki
227
00:14.87
3. sfumato
168
00:14.87
5. Yeti
140
00:15.50
6. mtanzer
140
00:16.17
7. sauceguardian
106
00:16.42
8. Oryn
178
00:16.44
9. qqwref
266
00:17.00
10. Sonar
83
00:17.17
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.007
2.hum@b0t
91
00:00.160
3.cheyette00:00.258

* 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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