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. Yeti
129
00:12.40
2. LemonSherbet 00:16.04
3. stevethesquid
70
00:20.03
4. niqnna
18
00:25.84
5. Dorice
256
00:29.87
6. nerdvert
96
00:31.23
7. SWICT
36
00:31.94
8. Gracexull
12
00:35.27
9. Goochelaar
106
00:40.20
10. tonyjo4312
33
00:44.67
11. thall
53
00:47.79
12. Tuffi
28
01:12.24
13. Sensei100000
25
01:14.26
14. xilli 01:22.69
15. shingenx 01:23.37
16. Grymhar 01:27.21
17. EG0hun 01:32.59
18. FunAcroFly
110
02:21.93
19. Dereham
52
02:32.05
20. Jazka 02:34.24
This Week
1. LemonSherbet 00:17.63
2. stevethesquid
70
00:20.03
3. Dorice
256
00:29.87
4. niqnna
18
00:33.87
5. nerdvert
96
00:43.89
6. tonyjo4312
33
00:44.67
7. thall
53
00:47.79
8. xilli 01:22.69
9. Grymhar 01:27.21
10. Jazka 02:34.24
11. TheRealSavikivi
5
21:47:44.78
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Today
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MO3
1. numbrr
302
00:11.07
2. mtanzer
140
00:13.41
3. gtkrouwel
129
00:14.04
4. TashiroMiraki
217
00:14.07
5. sfumato
166
00:15.17
6. Oryn
163
00:16.33
7. Yeti
129
00:16.95
8. 2015YINJ02
170
00:19.38
9. Nick
217
00:19.85
10. qqwref
262
00:19.95
AO5
1. numbrr
302
00:12.09
2. gtkrouwel
129
00:13.18
3. TashiroMiraki
217
00:14.69
4. mtanzer
140
00:15.42
5. sfumato
166
00:15.52
6. Oryn
163
00:17.99
7. Yeti
129
00:18.45
8. mmyama
79
00:20.09
9. qqwref
262
00:20.14
10. 2015YINJ02
170
00:20.18
AO12
1. numbrr
302
00:15.43
2. gtkrouwel
129
00:16.27
3. mtanzer
140
00:17.29
4. TashiroMiraki
217
00:18.02
5. sfumato
166
00:20.39
6. Yeti
129
00:23.32
7. qqwref
262
00:23.33
8. Nick
217
00:24.51
9. summernight
224
00:24.76
10. Oryn
163
00:25.51
Robots / programmatic solversinfo  
1.tlstyer
136
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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2025-12-06 09:18:08

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