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. AufdemWege
2
00:54.18
2. TomGuo
149
00:56.18
3. JiangGe 01:00.86
4. xxbh02jf 01:10.42
5. Wangxuye 01:12.19
6. Fishburger 01:15.17
7. LemonSherbet 01:16.92
8. Evannnnnn 01:19.37
9. shallwe
115
01:21.21
10. IdentityV 01:21.28
11. Goomy
126
01:22.78
12. katrin0000 01:22.83
13. BernadetteL 01:23.44
14. Emma Branch
22
01:24.36
15. mdeniz 01:24.75
16. wamfly
19
01:25.00
17. 山重水复
22
01:26.48
18. LukasMo
64
01:34.98
19. Semer
136
01:35.18
20. niqnna
18
01:37.62
This Week
1. TomGuo
149
00:56.18
2. JiangGe 01:02.75
3. xxbh02jf 01:11.69
4. LemonSherbet 01:16.92
5. Evannnnnn 01:19.37
6. IdentityV 01:21.28
7. BernadetteL 01:35.21
8. Europium
27
01:41.19
9. 山重水复
22
01:44.24
10. seb00066
90
01:44.51
11. katrin0000 01:50.27
12. HackMan
117
01:51.36
13. pipifax 01:51.70
14. niqnna
18
02:01.14
15. sunday_daze
67
02:02.30
16. jessicazzzzz 02:17.26
17. iris_heng
6
02:50.32
18. Goochelaar
106
02:53.25
19. Mia Shinbrot
30
03:14.61
20. Gracexull
7
03:52.43
Today
1. TomGuo
149
00:56.18
2. Europium
27
01:41.19
3. 山重水复
22
01:48.21
4. seb00066
90
01:49.80
5. jessicazzzzz 02:23.70
6. HackMan
117
02:29.59
7. iris_heng
6
02:50.32
8. niqnna
18
02:57.70
9. Gracexull
7
03:52.43
10. chrispy
69
07:45.97
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
301
00:36.81
2. TashiroMiraki
217
00:41.81
3. Sonar
77
00:45.80
3. gtkrouwel
129
00:45.80
5. sfumato
166
00:48.33
6. qqwref
261
00:49.53
7. sauceguardian
102
00:53.17
8. mtanzer
140
00:53.20
9. Brian Murphy
114
00:56.51
10. Nick
217
00:56.70
AO5
1. numbrr
301
00:38.90
2. TashiroMiraki
217
00:42.42
3. gtkrouwel
129
00:46.74
4. Sonar
77
00:47.77
5. sfumato
166
00:49.21
6. qqwref
261
00:53.33
7. sauceguardian
102
00:53.95
8. mtanzer
140
00:54.43
9. Brian Murphy
114
00:57.69
10. vowels
216
01:00.99
AO12
1. numbrr
301
00:42.97
2. TashiroMiraki
217
00:45.90
3. gtkrouwel
129
00:50.82
4. Sonar
77
00:53.12
5. sfumato
166
00:54.44
6. qqwref
261
00:57.59
7. mtanzer
140
00:58.75
8. sauceguardian
102
00:59.72
9. Yeti
124
01:05.14
10. vowels
216
01:06.31
Robots / programmatic solversinfo  
1.tlstyer
135
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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2025-11-15 18:27:31

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