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. Kimseunghyeon 00:15.79
2. PickleCat
43
00:18.42
3. Zemmel
79
00:21.48
4. kanon
53
00:24.93
5. Elias Westerbergh
69
00:28.32
6. xana233
59
00:30.63
7. May John
67
00:32.10
8. loki515
24
00:35.04
9. FunAcroFly
76
00:42.98
10. HackMan
108
00:43.18
11. randomflyintaco
111
00:45.88
12. Dorice
242
00:53.20
13. nerdvert
89
00:56.31
14. Chaojie Fu
65
00:57.68
15. Goochelaar
104
00:58.21
16. palakin 01:00.00
17. ambiorix 01:08.57
18. lauraapzz
58
01:16.13
19. LesAM 01:16.15
20. Rickieman86 01:17.39
This Week
1. Kimseunghyeon 00:15.79
2. kanon
53
00:24.93
3. Elias Westerbergh
69
00:28.32
4. xana233
59
00:30.63
5. FunAcroFly
76
00:42.98
6. nerdvert
89
00:56.31
7. lauraapzz
58
01:16.13
8. HackMan
108
01:34.96
9. PuZzLeGaRy
66
04:56.09
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Today
1. kanon
53
01:01.39
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MO3
1. numbrr
297
00:11.07
2. mtanzer
140
00:13.41
3. TashiroMiraki
215
00:14.07
4. sfumato
166
00:15.17
5. Oryn
148
00:16.33
6. gtkrouwel
118
00:18.34
7. 2015YINJ02
149
00:19.38
8. Nick
217
00:19.85
9. qqwref
259
00:19.95
10. summernight
211
00:20.25
AO5
1. numbrr
297
00:12.09
2. TashiroMiraki
215
00:14.69
3. mtanzer
140
00:15.42
4. sfumato
166
00:15.52
5. Oryn
148
00:17.99
6. gtkrouwel
118
00:19.27
7. mmyama
77
00:20.09
8. qqwref
259
00:20.14
9. 2015YINJ02
149
00:20.18
10. tantanaaa
72
00:20.33
AO12
1. numbrr
297
00:15.43
2. mtanzer
140
00:17.29
3. TashiroMiraki
215
00:18.02
4. gtkrouwel
118
00:20.17
5. sfumato
166
00:20.39
6. qqwref
259
00:23.33
7. Nick
217
00:24.51
8. summernight
211
00:24.76
9. Oryn
148
00:25.51
10. crascodyllea
141
00:25.75
Robots / programmatic solversinfo  
1.tlstyer
121
00:00.007
2.hum@b0t
91
00:00.164
3.cheyette00:00.356

* 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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2025-07-15 20:37:51

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