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.

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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

This Month
1. Yeti
131
00:47.22
2. Sonar
77
00:50.69
3. Zenta
84
00:52.74
4. stevethesquid
72
00:53.55
5. TomGuo
150
00:53.92
6. JiangGe 00:55.03
7. xxbh02jf 01:00.11
8. LemonSherbet 01:00.73
9. hkjsf
143
01:13.87
10. mdeniz 01:14.19
11. BernadetteL 01:19.99
12. tonyjo4312
36
01:25.50
13. crema
236
01:26.73
14. seb00066
91
01:27.32
15. Liv01 01:27.46
16. wamfly
20
01:33.10
17. Kimberly Fath
12
01:38.59
18. pipifax 01:41.03
19. Dorice
257
01:41.05
20. niqnna
18
01:41.71
This Week
1. stevethesquid
72
00:53.55
2. TomGuo
150
00:57.62
3. seb00066
91
01:27.32
4. Dorice
257
01:41.05
5. pipifax 01:45.39
6. HackMan
119
01:46.74
7. Fjznbeinfnn
4
01:54.94
8. ccolli 01:59.76
9. jessicazzzzz 02:26.90
10. dtyamada
111
02:27.63
11. Jazka 02:30.83
12. Mia Shinbrot
41
02:37.60
13. Solus
35
02:39.41
14. lc20110802
7
04:12.02
15. ambiorix 05:01.52
16. shangdou
31
05:10.81
17. Itstotallykyle
36
05:38.77
18. c1c51
26
11:03.10
19.--- empty -----:--
20.--- empty -----:--
Today
1. stevethesquid
72
00:53.55
2. jessicazzzzz 02:26.90
3. shangdou
31
05:10.81
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
303
00:36.81
2. TashiroMiraki
217
00:41.81
3. Sonar
77
00:45.80
3. gtkrouwel
130
00:45.80
5. sfumato
166
00:48.33
6. qqwref
264
00:49.53
7. sauceguardian
102
00:53.17
8. mtanzer
140
00:53.20
8. Yeti
131
00:53.20
10. Brian Murphy
114
00:56.51
AO5
1. numbrr
303
00:38.20
2. TashiroMiraki
217
00:42.42
3. gtkrouwel
130
00:46.74
4. Sonar
77
00:47.77
5. sfumato
166
00:49.21
6. qqwref
264
00:53.33
7. sauceguardian
102
00:53.95
8. Yeti
131
00:54.33
9. mtanzer
140
00:54.43
10. Brian Murphy
114
00:57.69
AO12
1. numbrr
303
00:41.32
2. TashiroMiraki
217
00:45.90
3. gtkrouwel
130
00:50.82
4. Sonar
77
00:53.12
5. sfumato
166
00:54.44
6. qqwref
264
00:57.59
7. Yeti
131
00:57.72
8. mtanzer
140
00:58.75
9. sauceguardian
102
00:59.72
10. kdu
213
01:06.12
Robots / programmatic solversinfo  
1.tlstyer
137
00:00.009
2.hum@b0t
91
00:00.163
3.cheyette00:05.661

* 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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2025-12-24 09:22:13

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