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. Brian Murphy
112
00:50.46
2. TomGuo
148
00:59.24
3. LemonSherbet 01:00.87
4. Oryn
155
01:12.41
5. tufelix367
58
01:14.19
6. Eskimosnake
110
01:17.43
7. Fishburger 01:18.06
8. eatbing
14
01:19.69
9. Dorice
247
01:20.56
10. Emgold 01:22.32
11. Harry_Canyon
130
01:23.79
12. mmyama
78
01:24.51
13. sunleonid
17
01:25.76
14. Liv01 01:28.51
15. U4v5n6
30
01:30.69
16. verberos
85
01:32.18
17. BernadetteL 01:34.74
18. Jorgito Salles
35
01:35.15
19. pipifax 01:41.61
20. HackMan
114
01:42.46
This Week
1. TomGuo
148
01:03.86
2. tufelix367
58
01:14.19
3. eatbing
14
01:19.69
4. Harry_Canyon
130
01:23.79
5. U4v5n6
30
01:30.69
6. verberos
85
01:33.32
7. BernadetteL 01:36.85
8. HackMan
114
01:42.46
9. xenicat
125
01:44.43
10. Goomy
122
01:46.29
11. pipifax 01:48.65
12. danpuzzler 01:55.46
13. niqnna
18
01:59.46
14. seb00066
88
02:14.06
15. ambiorix 02:21.88
16. VicCatLady
54
02:29.65
17. wyq97 02:33.95
18. Goochelaar
105
02:55.16
19. snowingbird
1
03:06.61
20. KETJAK
34
03:09.79
Today
1. BernadetteL 01:36.85
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MO3
1. numbrr
300
00:36.81
2. TashiroMiraki
216
00:41.81
3. Sonar
77
00:45.80
3. gtkrouwel
122
00:45.80
5. sfumato
166
00:48.33
6. qqwref
260
00:49.53
7. sauceguardian
100
00:53.17
8. mtanzer
140
00:53.20
9. Brian Murphy
112
00:56.51
10. Nick
217
00:56.70
AO5
1. numbrr
300
00:38.90
2. TashiroMiraki
216
00:42.42
3. Sonar
77
00:47.77
4. gtkrouwel
122
00:48.31
5. sfumato
166
00:49.21
6. qqwref
260
00:53.33
7. sauceguardian
100
00:53.95
8. mtanzer
140
00:54.43
9. Brian Murphy
112
00:57.69
10. vowels
216
01:00.99
AO12
1. numbrr
300
00:42.97
2. TashiroMiraki
216
00:45.90
3. gtkrouwel
122
00:50.83
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
100
00:59.72
9. Yeti
119
01:05.14
10. vowels
216
01:06.31
Robots / programmatic solversinfo  
1.tlstyer
128
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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2025-09-18 02:00:24

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