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
118
00:50.46
2. TomGuo
146
00:58.21
3. Kimseunghyeon 01:03.87
4. Totoro1997
1
01:11.71
5. PickleCat
39
01:14.53
6. Zemmel
77
01:19.17
7. Theck
25
01:26.18
8. HackMan
107
01:46.47
9. applepi 01:59.81
10. kanon
50
02:02.78
11. Lua
126
02:06.97
12. TQ-V85Sn
86
02:12.71
13. grimmgirlfandom
152
02:15.22
14. Praktisix
95
02:38.42
15. Chaojie Fu
64
02:39.26
16. Dorice
242
02:49.49
17. May John
65
02:51.93
18. chiimo 03:20.62
19. llmt9
82
03:32.97
20. KKATE
14
03:55.75
This Week
1. gtkrouwel
118
00:50.46
2. TomGuo
146
01:04.79
3. Kimseunghyeon 01:21.70
4. Lua
126
02:06.97
5. kanon
50
02:07.58
6. TQ-V85Sn
86
02:12.71
7. HackMan
107
02:29.97
8. May John
65
02:51.93
9. Praktisix
95
03:13.53
10. AnonyMinor
52
04:38.16
11. Ermanr 05:07.60
12. sodiumwater 07:27.22
13. shangdou
23
08:25.70
14. 별사탕
12
10:28.66
15. und oredo
12
24d 20:31:23.64
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Today
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MO3
1. numbrr
297
00:46.10
2. TashiroMiraki
215
00:47.55
3. gtkrouwel
118
00:50.53
4. sfumato
166
01:01.21
5. qqwref
259
01:05.62
6. Yeti
117
01:06.28
7. Nick
217
01:07.31
8. mtanzer
140
01:10.95
9. summernight
211
01:12.70
10. mmyama
77
01:13.09
AO5
1. numbrr
297
00:46.10
2. TashiroMiraki
215
00:51.06
3. gtkrouwel
118
00:54.50
4. Yeti
117
01:07.43
5. sfumato
166
01:08.37
6. mtanzer
140
01:11.61
7. qqwref
259
01:13.56
8. summernight
211
01:14.94
9. Oryn
148
01:16.78
10. 2015YINJ02
148
01:20.51
AO12
1. numbrr
297
00:55.85
2. TashiroMiraki
215
00:56.88
3. gtkrouwel
118
01:03.43
4. summernight
211
01:19.65
5. qqwref
259
01:23.77
6. Oryn
148
01:24.66
7. mtanzer
140
01:25.21
8. Yeti
117
01:31.17
9. sfumato
166
01:32.17
10. z9z9z9z9z9
82
01:39.06
Robots / programmatic solversinfo  
1.tlstyer
120
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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2025-07-09 07:21:26

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