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. gtkrouwel
128
00:41.74
2. AufdemWege
2
00:54.18
3. daklqw
32
00:55.43
4. TomGuo
149
00:56.55
5. Wangxuye 00:59.61
6. Harry_Canyon
132
01:09.48
7. Goomy
124
01:13.31
8. Emgold 01:14.44
9. Fishburger 01:15.17
10. 1411673906 01:17.43
11. katrin0000 01:22.83
12. BernadetteL 01:23.44
13. wamfly
19
01:25.00
14. Jorgito Salles
45
01:27.87
15. Liv01 01:29.00
16. wiglicker 01:31.81
17. Semer
132
01:35.18
18. niqnna
18
01:37.62
19. Dorice
252
01:38.04
20. sunday_daze
66
01:38.41
This Week
1. AufdemWege
2
00:54.18
2. TomGuo
149
01:12.26
3. Fishburger 01:15.17
4. Goomy
124
01:22.78
5. katrin0000 01:22.83
6. Wangxuye 01:25.15
7. Dorice
252
01:40.27
8. niqnna
18
01:58.30
9. fishysua
151
02:11.21
10. snowingbird
1
02:12.82
11. HackMan
116
02:12.90
12. sunday_daze
66
02:21.66
13. danpuzzler 02:32.57
14. Mia Shinbrot
22
02:39.29
15. pokosuk
36
03:05.35
16. randomflyintaco
127
03:05.71
17. Goochelaar
106
03:21.55
18. dtyamada
105
03:34.84
19. DeSppedy1
7
03:46.99
20. chrispy
69
05:29.88
Today
1. AufdemWege
2
00:57.77
2. TomGuo
149
01:12.26
3. Fishburger 01:15.17
4. katrin0000 01:22.83
5. fishysua
151
02:11.21
6. niqnna
18
02:13.59
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
301
00:36.81
2. TashiroMiraki
217
00:41.81
3. Sonar
77
00:45.80
3. gtkrouwel
128
00:45.80
5. sfumato
166
00:48.33
6. qqwref
260
00:49.53
7. sauceguardian
101
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
128
00:46.74
4. Sonar
77
00:47.77
5. sfumato
166
00:49.21
6. qqwref
260
00:53.33
7. sauceguardian
101
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
128
00:50.82
4. Sonar
77
00:53.12
5. sfumato
166
00:54.44
6. qqwref
260
00:57.59
7. mtanzer
140
00:58.75
8. sauceguardian
101
00:59.72
9. Yeti
121
01:05.14
10. vowels
216
01:06.31
Robots / programmatic solversinfo  
1.tlstyer
133
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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2025-10-25 17:30:52

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