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. JZE
85
00:03.04
2. LemonSherbet 00:03.13
3. TheLoneWolf 00:03.18
4. beatrixwashere
108
00:04.22
5. thrasymachus
23
00:05.06
6. Parade
36
00:05.36
7. Piroska9
65
00:05.78
8. ikun25 00:05.96
9. Solus
29
00:06.61
10. Hashibrown 00:06.84
11. Half_Line
22
00:07.88
12. niqnna
18
00:08.60
13. 淳粹淳迷
19
00:08.85
14. huohuo2004
6
00:08.93
15. KongeBob 00:09.68
16. amdo1 00:12.47
17. SophieK
39
00:12.93
18. lukingood
5
00:16.41
19. LesAM 00:18.47
20. Number333 00:18.73
This Week
1. TheLoneWolf 00:03.18
2. Solus
29
00:06.61
3. AK45
34
00:53.72
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Today
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MO3
1. numbrr
298
00:02.83
2. vowels
216
00:03.01
3. mtanzer
140
00:03.39
4. TashiroMiraki
216
00:03.58
5. Klunk
24
00:04.23
6. Nick
217
00:04.31
7. Oryn
149
00:04.33
8. jaybrainer
240
00:04.56
9. limsh1201 4
50
00:04.57
10. Eskimosnake
105
00:04.74
AO5
1. vowels
216
00:03.35
2. numbrr
298
00:03.52
3. mtanzer
140
00:03.83
4. TashiroMiraki
216
00:04.25
5. Klunk
24
00:04.42
6. Oryn
149
00:04.65
7. Nick
217
00:04.74
8. sfumato
166
00:04.83
9. Eskimosnake
105
00:05.03
10. ded24lol
37
00:05.26
AO12
1. numbrr
298
00:04.19
2. vowels
216
00:04.71
3. mtanzer
140
00:05.02
4. Oryn
149
00:05.62
5. TashiroMiraki
216
00:05.86
6. Nick
217
00:05.93
7. sfumato
166
00:06.53
8. 飞飞
50
00:06.69
9. Eskimosnake
105
00:07.03
10. Yeti
117
00:07.91
Robots / programmatic solversinfo  
1.tlstyer
126
00:00.007
2.cheyette00:00.115
3.hum@b0t
91
00:00.159

* 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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2025-08-18 13:06:56

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