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 00:15.58
2. kennethaw88
152
00:21.02
3. Wangxuye 00:21.10
4. 山重水复
21
00:21.89
5. niqnna
18
00:22.10
6. pipifax 00:24.87
7. HackMan
116
00:25.63
8. shallwe
115
00:28.67
9. Toksku 00:28.95
10. Chaojie Fu
69
00:29.07
11. xilli 00:29.34
12. AnonyMinor
63
00:33.44
13. Goochelaar
106
00:35.84
14. fishysua
152
00:36.25
15. sloppc1 00:38.30
16. stevethesquid
67
00:38.98
17. randomflyintaco
130
00:39.07
18. SophieK
44
00:41.22
19. Europium
25
00:41.73
20. ambiorix 00:43.70
This Week
1. LemonSherbet 00:20.65
2. 山重水复
21
00:21.89
3. niqnna
18
00:22.13
4. shallwe
115
00:28.67
5. AnonyMinor
63
00:33.44
6. HackMan
116
00:37.22
7. PeeinPotty 00:53.94
8. FunAcroFly
104
01:05.51
9. chrispy
69
01:12.52
10. EG0hun 01:18.70
11. NaluXV1 01:36.91
12.--- empty -----:--
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20.--- empty -----:--
Today
1. niqnna
18
00:22.35
2. shallwe
115
00:28.67
3. FunAcroFly
104
01:05.51
4. chrispy
69
01:38.40
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
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20.--- empty -----:--
MO3
1. numbrr
301
00:11.24
2. mtanzer
140
00:12.14
3. sfumato
166
00:12.30
4. TashiroMiraki
217
00:12.95
5. gtkrouwel
128
00:13.35
6. Oryn
159
00:13.36
7. Yeti
122
00:14.10
8. vowels
216
00:14.15
9. sauceguardian
101
00:14.22
10. Arok
115
00:14.35
AO5
1. numbrr
301
00:12.27
2. sfumato
166
00:12.81
3. gtkrouwel
128
00:13.10
4. TashiroMiraki
217
00:13.72
5. Oryn
159
00:13.82
6. mtanzer
140
00:14.07
7. qqwref
261
00:14.60
8. sauceguardian
101
00:14.79
9. Yeti
122
00:15.01
10. Nick
217
00:15.32
AO12
1. numbrr
301
00:13.99
2. gtkrouwel
128
00:14.18
3. TashiroMiraki
217
00:14.87
3. sfumato
166
00:14.87
5. mtanzer
140
00:16.17
6. sauceguardian
101
00:16.42
7. Oryn
159
00:16.44
8. qqwref
261
00:17.00
9. Sonar
77
00:17.17
10. Yeti
122
00:17.69
Robots / programmatic solversinfo  
1.tlstyer
135
00:00.007
2.hum@b0t
91
00:00.160
3.cheyette00:00.258

* 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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2025-11-06 16:44:56

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