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. Sonar
82
00:05.51
2. zenzaburo 00:07.38
3. niqnna
18
00:08.33
4. Kukko
162
00:08.55
5. SophieK
53
00:09.38
6. a21737074481
170
00:09.84
7. 2021zhao07
23
00:10.26
8. HackMan
122
00:10.45
9. LordHedgie 00:10.47
10. pipifax 00:10.50
11. Methyl Red
12
00:10.72
12. lxy082 00:10.89
13. frog3
7
00:11.68
14. Dorice
264
00:11.88
15. cccgao 00:11.92
16. monjo 00:12.06
17. Axiomatically_confus...
28
00:12.20
18. shfrUwU
7
00:12.75
19. Strider500
104
00:13.33
20. Mazuzon 00:13.61
This Week
1. zenzaburo 00:08.96
2. 2021zhao07
23
00:10.26
3. frog3
7
00:11.68
4. Dorice
264
00:11.88
5. Axiomatically_confus...
28
00:12.20
6. niqnna
18
00:12.52
7. CitricBase
8
00:13.62
8. itsleviOsanotlevioSA
21
00:14.95
9. Partimento
54
00:19.93
10. foverino
10
00:20.21
11. 游侠儿
7
00:20.33
12. Broccoli
8
00:27.27
13. fartface
18
00:28.15
14. chrispy
74
00:31.97
15. huangzhishen 00:59.77
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. frog3
7
00:11.68
2. Axiomatically_confus...
28
00:12.20
3. 游侠儿
7
00:20.33
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
308
00:04.21
2. Yeti
137
00:05.19
3. vowels
216
00:05.21
4. mtanzer
140
00:05.22
5. Arok
115
00:05.24
6. gtkrouwel
133
00:05.36
7. sfumato
166
00:05.44
8. sauceguardian
104
00:05.81
9. TashiroMiraki
219
00:05.91
10. PuzzleMaestro
90
00:05.94
AO5
1. numbrr
308
00:04.76
2. gtkrouwel
133
00:05.49
3. Yeti
137
00:05.87
4. mtanzer
140
00:05.96
5. sfumato
166
00:06.02
6. Arok
115
00:06.06
7. TashiroMiraki
219
00:06.18
8. sauceguardian
104
00:06.20
9. vowels
216
00:06.31
10. jaybrainer
253
00:06.33
AO12
1. numbrr
308
00:05.38
2. Yeti
137
00:06.20
3. gtkrouwel
133
00:06.29
4. sfumato
166
00:06.43
5. mtanzer
140
00:06.94
5. Arok
115
00:06.94
7. TashiroMiraki
219
00:07.08
8. sauceguardian
104
00:07.10
9. qqwref
266
00:07.20
10. Douglas Shamlin Jr.
718
00:07.34
Robots / programmatic solversinfo  
1.tlstyer
141
00:00.006
2.cheyette00:00.141
3.hum@b0t
91
00:00.160

* 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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2026-03-05 10:00:33

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