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.

Video Tutorial
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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. zenzaburo 00:16.93
2. Theck
31
00:19.65
3. tt1029
134
00:19.99
4. niqnna
18
00:22.07
5. Zangzihan 00:24.96
6. DuckGo 00:25.39
7. toblin 00:26.46
8. grimmgirlfandom
174
00:29.64
9. amdo1 00:30.54
10. ojyojyojy
50
00:30.92
11. maxmoor 00:32.01
12. Nanoulefou 00:36.02
13. MARTIN1979
101
00:38.34
14. ggggguava
92
00:41.63
15. takaz 00:43.60
16. llmt9
101
00:46.13
17. BigHeadGriffin
21
00:50.46
18. Beastinboston
63
00:51.24
19. endlichkeit 01:00.73
20. 白切叉燒鵝
67
01:05.30
This Week
1. zenzaburo 00:16.93
2. niqnna
18
00:22.07
3. toblin 00:26.46
4. ojyojyojy
50
00:30.92
5. maxmoor 00:32.01
6. Beastinboston
63
00:51.24
7. 白切叉燒鵝
67
01:05.30
8. llmt9
101
01:15.12
9. tsukishiro21
24
02:31.31
10. Grymhar 03:50.69
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Today
1. zenzaburo 00:20.61
2. ojyojyojy
50
00:30.92
3. llmt9
101
01:15.12
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5.--- empty -----:--
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MO3
1. numbrr
322
00:12.77
2. TashiroMiraki
231
00:14.96
3. gtkrouwel
139
00:16.28
4. Klunk
24
00:17.36
5. mtanzer
140
00:18.21
6. FiloNiloPilo
55
00:19.43
7. sfumato
168
00:20.43
8. Yeti
143
00:20.45
9. Nick
217
00:21.19
10. Oryn
186
00:21.39
AO5
1. numbrr
322
00:14.36
2. TashiroMiraki
231
00:15.81
3. gtkrouwel
139
00:16.52
4. mtanzer
140
00:19.33
5. Yeti
143
00:19.59
6. Oryn
186
00:21.78
7. sfumato
168
00:22.39
8. Nick
217
00:23.23
9. FiloNiloPilo
55
00:23.81
10. goodman15
66
00:24.61
AO12
1. numbrr
322
00:17.12
2. TashiroMiraki
231
00:17.29
3. gtkrouwel
139
00:19.99
4. Yeti
143
00:25.01
5. goodman15
66
00:27.90
6. Oryn
186
00:28.67
7. mtanzer
140
00:29.15
8. 2015YINJ02
187
00:29.30
9. qqwref
266
00:29.59
10. Yonatan Yarhi
72
00:30.12
Robots / programmatic solversinfo  
1.tlstyer
151
00:00.008
2.siebi
1
00:00.013
3.hum@b0t
91
00:00.165

* 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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