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. Oryn
192
00:14.55
2. zenzaburo 00:18.97
3. niqnna
18
00:21.91
4. toblin 00:23.41
5. kennethaw88
162
00:24.87
6. crema
277
00:25.66
7. grimmgirlfandom
175
00:27.92
8. MARTIN1979
101
00:28.83
9. ojyojyojy
58
00:29.76
10. Zangzihan 00:32.16
11. Nanoulefou 00:33.13
12. Meerkat
218
00:34.76
13. shei
89
00:38.59
14. Rickieman86 00:39.92
15. llmt9
104
00:40.89
16. Limax 00:44.54
17. maxmoor 00:45.83
18. AnonyMinor
92
00:47.05
19. tsukishiro21
31
00:51.97
20. Dorice
274
00:52.63
This Week
1. zenzaburo 00:21.10
2. niqnna
18
00:24.20
3. crema
277
00:25.66
4. ojyojyojy
58
00:29.76
5. Meerkat
218
00:34.76
6. shei
89
00:38.59
7. Rickieman86 00:39.92
8. grimmgirlfandom
175
00:46.67
9. AnonyMinor
92
00:47.05
10. tsukishiro21
31
00:51.97
11. takaz 00:57.55
12. omnilynx 01:23.83
13. Emfine
84
01:29.22
14. PuZzLeGaRy
68
05:59.28
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Today
1. zenzaburo 00:23.86
2. ojyojyojy
58
00:29.76
3. AnonyMinor
92
00:47.05
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
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MO3
1. numbrr
325
00:12.77
2. TashiroMiraki
233
00:14.96
3. gt83
141
00:16.28
4. Klunk
24
00:17.36
5. mtanzer
140
00:18.21
6. FiloNiloPilo
56
00:19.43
7. Oryn
192
00:20.20
8. sfumato
168
00:20.43
9. Yeti
143
00:20.45
10. Nick
217
00:21.19
AO5
1. numbrr
325
00:14.36
2. TashiroMiraki
233
00:15.81
3. gt83
141
00:16.52
4. mtanzer
140
00:19.33
5. Yeti
143
00:19.59
6. Oryn
192
00:21.78
7. sfumato
168
00:22.39
8. Nick
217
00:23.23
9. FiloNiloPilo
56
00:23.81
10. goodman15
66
00:24.61
AO12
1. numbrr
325
00:17.12
2. TashiroMiraki
233
00:17.29
3. gt83
141
00:19.99
4. Yeti
143
00:25.01
5. goodman15
66
00:27.90
6. Oryn
192
00:28.67
7. mtanzer
140
00:29.15
8. 2015YINJ02
187
00:29.30
9. qqwref
266
00:29.59
10. Yonatan Yarhi
74
00:30.12
Robots / programmatic solversinfo  
1.tlstyer
154
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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