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

New Puzzle
This Month
1. ypw19
90
00:14.48
2. zenzaburo 00:15.33
3. Kukko
164
00:20.02
4. niqnna
18
00:20.39
5. beatrixwashere
115
00:20.56
6. Ontwikseltsaar
102
00:20.86
7. keehaag
166
00:21.07
8. Truth-or-Peace
132
00:22.15
9. Dorice
264
00:23.70
10. nerdvert
99
00:28.09
11. Axiomatically_confus...
31
00:29.07
12. qobi
235
00:34.49
13. SophieK
56
00:35.12
14. Jazka 00:38.06
15. LonelyNess 00:39.54
16. monjo 00:41.46
17. Goochelaar
107
00:42.23
18. EG0hun 00:42.88
19. LordHedgie 00:48.11
20. peeps469
13
00:53.15
This Week
1. zenzaburo 00:16.42
2. beatrixwashere
115
00:20.56
3. Ontwikseltsaar
102
00:20.86
4. niqnna
18
00:24.91
5. SophieK
56
00:35.12
6. monjo 00:45.35
7. guizmoo 01:02.08
8. PaniOlga 01:12.43
9. MARTIN1979
101
01:20.62
10. Sarah Brown-Scott
16
01:38.88
11. LikeGazelle
21
01:44.35
12. Kenolo353
120
01:49.27
13. Aleck Giles
51
03:36.34
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. zenzaburo 00:27.77
2. MARTIN1979
101
01:20.62
3. LikeGazelle
21
01:44.35
4. Aleck Giles
51
03:36.34
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
309
00:11.07
2. mtanzer
140
00:13.41
3. gtkrouwel
134
00:14.04
4. TashiroMiraki
221
00:14.07
5. sfumato
166
00:15.17
6. Oryn
170
00:16.33
7. Yeti
138
00:16.95
8. Zenta
95
00:19.31
9. 2015YINJ02
178
00:19.38
10. ypw19
90
00:19.67
AO5
1. numbrr
309
00:12.09
2. gtkrouwel
134
00:13.18
3. TashiroMiraki
221
00:14.69
4. mtanzer
140
00:15.42
5. sfumato
166
00:15.52
6. Oryn
170
00:17.99
7. Yeti
138
00:18.45
8. ypw19
90
00:19.67
9. mmyama
79
00:20.09
10. qqwref
266
00:20.14
AO12
1. numbrr
309
00:15.43
2. gtkrouwel
134
00:16.27
3. mtanzer
140
00:17.29
4. TashiroMiraki
221
00:18.02
5. sfumato
166
00:20.39
6. Yeti
138
00:23.32
7. qqwref
266
00:23.33
8. Nick
217
00:24.51
9. summernight
231
00:24.76
10. Oryn
170
00:25.51
Robots / programmatic solversinfo  
1.tlstyer
142
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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