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. TomGuo
147
00:51.14
2. TheLoneWolf 00:57.73
3. LemonSherbet 00:57.80
4. mdeniz 01:05.88
5. wiglicker 01:13.05
6. Fishburger 01:17.22
7. Hashibrown 01:21.92
8. tufelix367
58
01:23.06
9. 보믈고
40
01:30.12
10. Liv01 01:38.99
11. Blackberry
19
01:39.00
12. HackMan
112
01:39.24
13. pipifax 01:48.53
14. Eskimosnake
106
01:48.85
15. Chaojie Fu
67
01:50.50
16. angelrose971
93
02:02.25
17. LesAM 02:03.61
18. thrasymachus
26
02:04.79
19. seb00066
86
02:10.57
20. Airbored3000
14
02:13.65
This Week
1. TheLoneWolf 00:57.73
2. TomGuo
147
00:59.63
3. Fishburger 01:23.05
4. 보믈고
40
01:30.12
5. tufelix367
58
01:32.38
6. HackMan
112
01:51.50
7. Liv01 01:58.80
8. LesAM 02:03.61
9. pipifax 02:04.31
10. seb00066
86
02:10.57
11. danpuzzler 02:43.98
12. VicCatLady
54
02:50.66
13. paejunk
53
02:51.12
14. LockedKey
73
03:00.60
15. ambiorix 04:01.72
16. snowingbird 04:52.82
17. Laryssa Assis
21
05:24.24
18. chrispy
66
07:04.20
19. oursinblanc
15
15:36.15
20. shangdou
26
23:22.71
Today
1. HackMan
112
01:51.50
2. snowingbird 04:52.82
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10.--- empty -----:--
11.--- empty -----:--
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MO3
1. numbrr
298
00:36.81
2. TashiroMiraki
216
00:41.81
3. Sonar
77
00:45.80
3. gtkrouwel
120
00:45.80
5. sfumato
166
00:48.33
6. qqwref
260
00:49.53
7. sauceguardian
99
00:53.17
8. mtanzer
140
00:53.20
9. Brian Murphy
109
00:56.51
10. Nick
217
00:56.70
AO5
1. numbrr
298
00:38.90
2. TashiroMiraki
216
00:42.42
3. Sonar
77
00:47.77
4. gtkrouwel
120
00:48.31
5. sfumato
166
00:49.21
6. qqwref
260
00:53.33
7. sauceguardian
99
00:53.95
8. mtanzer
140
00:54.43
9. Brian Murphy
109
00:59.77
10. vowels
216
01:00.99
AO12
1. numbrr
298
00:42.97
2. TashiroMiraki
216
00:45.90
3. gtkrouwel
120
00:50.83
4. Sonar
77
00:53.12
5. sfumato
166
00:54.44
6. qqwref
260
00:57.59
7. mtanzer
140
00:58.75
8. sauceguardian
99
00:59.72
9. Yeti
117
01:05.14
10. vowels
216
01:06.31
Robots / programmatic solversinfo  
1.tlstyer
126
00:00.009
2.hum@b0t
91
00:00.163
3.cheyette00:05.661

* 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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2025-08-20 12:29:41

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