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. gtkrouwel
121
00:46.85
2. TomGuo
148
00:54.65
3. LemonSherbet 01:11.70
4. SoiTrang
72
01:29.18
5. Dorice
246
01:42.36
6. nashvillebudd 01:50.86
7. HackMan
112
01:55.96
8. Liv01 01:58.92
9. rekted 02:04.93
10. sgychen6
101
02:12.03
11. TQ-V85Sn
87
02:14.85
12. Lady
62
02:20.72
13. Eskimosnake
108
02:31.07
14. maioxl 02:36.51
15. thrasymachus
30
02:55.14
16. ambiorix 03:23.56
17. Praktisix
102
03:40.87
18. kiwilad
28
04:17.77
19. angelrose971
94
04:40.11
20. Laryssa Assis
21
04:58.01
This Week
1. TomGuo
148
01:03.46
2. gtkrouwel
121
01:11.88
3. Dorice
246
01:42.36
4. nashvillebudd 01:50.86
5. HackMan
112
01:55.96
6. sgychen6
101
02:12.03
7. Eskimosnake
108
02:31.07
8. maioxl 02:36.51
9. TQ-V85Sn
87
02:46.33
10. Lady
62
03:08.33
11. kiwilad
28
04:17.77
12. AnonyMinor
56
05:34.41
13. drbop
44
2:43:52.09
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Today
1. Dorice
246
07:43.60
2.--- empty -----:--
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
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MO3
1. numbrr
300
00:46.10
2. TashiroMiraki
216
00:47.55
3. gtkrouwel
121
00:50.53
4. sfumato
166
01:01.21
5. qqwref
260
01:05.62
6. Yeti
118
01:06.28
7. Nick
217
01:07.31
8. mtanzer
140
01:10.95
9. 2015YINJ02
158
01:12.11
10. summernight
214
01:12.70
AO5
1. numbrr
300
00:46.10
2. TashiroMiraki
216
00:51.06
3. gtkrouwel
121
00:54.50
4. Yeti
118
01:07.43
5. sfumato
166
01:08.37
6. mtanzer
140
01:11.61
7. qqwref
260
01:13.56
8. summernight
214
01:14.94
9. 2015YINJ02
158
01:15.93
10. Oryn
152
01:16.78
AO12
1. numbrr
300
00:55.85
2. TashiroMiraki
216
00:56.88
3. gtkrouwel
121
01:00.40
4. summernight
214
01:19.65
5. qqwref
260
01:23.77
6. Oryn
152
01:24.66
7. mtanzer
140
01:25.21
8. Yeti
118
01:31.17
9. sfumato
166
01:32.17
10. 2015YINJ02
158
01:33.71
Robots / programmatic solversinfo  
1.tlstyer
126
00:00.011
2.hum@b0t
91
00:00.163
3.cheyette00:02.504

* 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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2025-08-29 14:39:00

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