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. LemonSherbet 00:06.43
2. Oryn
160
00:07.28
3. CauDravan
41
00:09.13
4. Jorgito Salles
48
00:09.51
5. niqnna
18
00:09.73
6. beatrixwashere
110
00:11.00
7. Wangxuye 00:11.18
8. kennethaw88
152
00:11.90
9. nerdvert
95
00:13.22
10. danpuzzler 00:13.39
11. TheSunBro
61
00:13.51
12. Nyauchoo
9
00:14.56
13. stevethesquid
68
00:15.09
14. HackMan
117
00:16.05
15. Kelizo
29
00:17.01
16. Ryong L
77
00:23.41
17. EG0hun 00:24.45
18. waggonra 00:25.20
19. AnonyMinor
64
00:26.98
20. 山重水复
23
00:27.41
This Week
1. Oryn
160
00:07.28
2. CauDravan
41
00:09.13
3. beatrixwashere
110
00:11.00
4. LemonSherbet 00:11.15
5. niqnna
18
00:11.91
6. danpuzzler 00:13.39
7. stevethesquid
68
00:15.09
8. nerdvert
95
00:16.50
9. AnonyMinor
64
00:26.98
10. Gracexull
8
00:28.34
11. arod97
21
00:29.24
12. FCBSophie
52
00:50.79
13. gorilla801 00:52.05
14. zetaxiupsilon 01:02.25
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Today
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MO3
1. numbrr
301
00:04.90
2. gtkrouwel
129
00:05.59
3. Arok
115
00:05.94
4. mtanzer
140
00:06.82
5. sfumato
166
00:06.86
6. Yeti
125
00:06.87
7. jaybrainer
243
00:07.06
8. Oryn
160
00:07.13
9. TashiroMiraki
217
00:07.30
10. Douglas Shamlin Jr.
714
00:08.36
AO5
1. numbrr
301
00:05.44
2. gtkrouwel
129
00:06.70
3. Arok
115
00:06.82
4. mtanzer
140
00:07.17
5. Yeti
125
00:07.30
6. sfumato
166
00:07.60
7. Oryn
160
00:08.02
8. TashiroMiraki
217
00:08.17
9. jaybrainer
243
00:08.33
10. qqwref
261
00:08.60
AO12
1. numbrr
301
00:07.92
2. gtkrouwel
129
00:08.25
3. TashiroMiraki
217
00:08.76
4. mtanzer
140
00:09.04
5. Yeti
125
00:09.14
6. Oryn
160
00:09.48
7. sfumato
166
00:09.69
8. qqwref
261
00:10.55
9. Arok
115
00:10.68
10. jaybrainer
243
00:11.03
Robots / programmatic solversinfo  
1.tlstyer
135
00:00.007
2.cheyette00:00.160
3.hum@b0t
91
00:00.162

* 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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2025-11-19 01:20:33

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