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 00:13.71
2. Eskimosnake
105
00:16.76
3. Parade
36
00:16.84
4. 淳粹淳迷
19
00:17.40
5. goodman15
15
00:17.81
6. Rhododendron
136
00:18.57
7. Jorgito Salles
30
00:19.24
8. sgychen6
100
00:20.95
9. pipifax 00:22.94
10. pouldu
110
00:24.24
11. thrasymachus
23
00:25.94
12. Chaojie Fu
66
00:26.30
13. SophieK
39
00:27.89
14. Half_Line
22
00:27.90
15. Rickieman86 00:28.52
16. kanon
54
00:29.27
17. Dreamcountsheep
5
00:29.29
18. lc20110802
6
00:29.61
19. HackMan
112
00:31.42
20. ambiorix 00:31.79
This Week
1. pipifax 00:24.74
2. Chaojie Fu
66
00:26.30
3. ambiorix 00:31.79
4. AnonyMinor
55
00:34.66
5. HackMan
112
00:35.24
6. Koakuma
48
00:40.00
7. LockedKey
72
00:43.15
8. LesAM 00:46.37
9. Solus
29
00:50.69
10. chrispy
66
01:27.12
11. shangdou
26
01:27.57
12. Kailo
23
01:31.85
13. wiseguy
74
05:13.41
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Today
1. AnonyMinor
55
00:34.66
2. chrispy
66
03:00.65
3.--- empty -----:--
4.--- empty -----:--
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
298
00:11.24
2. mtanzer
140
00:12.14
3. sfumato
166
00:12.30
4. TashiroMiraki
216
00:12.95
5. gtkrouwel
120
00:13.35
6. Oryn
149
00:13.36
7. Yeti
117
00:14.10
8. vowels
216
00:14.15
9. sauceguardian
99
00:14.22
10. Arok
113
00:14.35
AO5
1. numbrr
298
00:12.27
2. sfumato
166
00:12.81
3. gtkrouwel
120
00:13.10
4. TashiroMiraki
216
00:13.72
5. Oryn
149
00:13.82
6. mtanzer
140
00:14.07
7. qqwref
260
00:14.60
8. sauceguardian
99
00:14.79
9. Yeti
117
00:15.01
10. Nick
217
00:15.32
AO12
1. numbrr
298
00:13.99
2. gtkrouwel
120
00:14.18
3. TashiroMiraki
216
00:14.87
3. sfumato
166
00:14.87
5. mtanzer
140
00:16.17
6. sauceguardian
99
00:16.42
7. Oryn
149
00:16.44
8. qqwref
260
00:17.00
9. Sonar
77
00:17.17
10. Yeti
117
00:17.69
Robots / programmatic solversinfo  
1.tlstyer
126
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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2025-08-18 14:26:21

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