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. Sonar
79
00:50.14
2. stevethesquid
74
00:53.55
3. JiangGe 00:55.14
4. TomGuo
151
00:57.62
5. mmyama
79
01:04.30
6. katrin0000 01:10.11
7. Dorice
259
01:14.86
8. 1411673906 01:19.64
9. HackMan
120
01:26.18
10. Fishburger 01:27.05
11. seb00066
92
01:27.32
12. BernadetteL 01:29.51
13. Liv01 01:30.91
14. Harry_Canyon
135
01:31.36
15. KongeBob 01:33.26
16. Jazka 01:36.99
17. random_person
124
01:37.98
18. Maja Bartnik
31
01:38.83
19. pipifax 01:41.26
20. WYJ
57
01:42.25
This Week
1. Sonar
79
00:53.52
2. JiangGe 01:00.84
3. mmyama
79
01:04.30
4. TomGuo
151
01:04.70
5. Fishburger 01:27.05
6. Harry_Canyon
135
01:31.36
7. random_person
124
01:37.98
8. HackMan
120
01:40.93
9. seb00066
92
01:47.43
10. snowingbird
1
01:50.76
11. Jazka 01:59.29
12. WYJ
57
02:04.44
13. niqnna
18
02:06.71
14. Methyl Red
4
02:11.57
15. Gracexull
15
02:15.91
16. ScoutDad 02:22.39
17. oshi
57
02:42.54
18. Happylad_TZ
5
02:49.62
19. Mia Shinbrot
46
02:56.07
20. ambiorix 03:04.13
Today
1. TomGuo
151
01:04.70
2. Fishburger 01:27.05
3. seb00066
92
01:47.43
4. snowingbird
1
02:01.66
5. niqnna
18
02:06.71
6. Methyl Red
4
02:11.57
7. HackMan
120
02:37.08
8. Happylad_TZ
5
02:49.62
9. chrispy
71
05:25.58
10. gaheimann
9
08:31.94
11. Kenolo353
116
24d 20:31:23.64
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
305
00:36.81
2. TashiroMiraki
217
00:41.81
3. Sonar
79
00:45.80
3. gtkrouwel
132
00:45.80
5. sfumato
166
00:48.33
6. qqwref
266
00:49.53
7. sauceguardian
103
00:53.17
8. mtanzer
140
00:53.20
8. Yeti
133
00:53.20
10. Brian Murphy
114
00:56.51
AO5
1. numbrr
305
00:38.20
2. TashiroMiraki
217
00:42.42
3. gtkrouwel
132
00:46.74
4. Sonar
79
00:47.77
5. sfumato
166
00:49.21
6. qqwref
266
00:53.33
7. sauceguardian
103
00:53.95
8. Yeti
133
00:54.33
9. mtanzer
140
00:54.43
10. Brian Murphy
114
00:57.69
AO12
1. numbrr
305
00:41.32
2. TashiroMiraki
217
00:45.90
3. gtkrouwel
132
00:50.82
4. Sonar
79
00:53.12
5. sfumato
166
00:54.44
6. qqwref
266
00:57.59
7. Yeti
133
00:57.72
8. mtanzer
140
00:58.75
9. sauceguardian
103
00:59.72
10. kdu
216
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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2026-01-17 19:11:18

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