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. gt83
141
00:45.06
2. Oryn
194
00:57.16
3. tt1029
139
00:59.28
4. DarkChamp 01:00.00
5. Hachiman 01:02.74
6. Yeti
143
01:06.12
7. ojyojyojy
58
01:09.58
8. highprime
156
01:11.46
9. KongeBob 01:12.04
10. zenzaburo 01:12.60
11. iovichulo413
57
01:15.24
12. xxbh02jf 01:16.07
13. Thrillhou
19
01:20.54
14. Jananana
61
01:23.81
15. baimouren
99
01:26.81
16. Hesper
95
01:28.59
17. Limax 01:36.42
18. bsk5941
111
01:38.08
19. nbapip 01:40.95
20. Froerto3301
49
01:42.84
This Week
1. Oryn
194
00:59.29
2. tt1029
139
01:02.78
3. Yeti
143
01:06.12
4. Hachiman 01:09.00
5. ojyojyojy
58
01:09.58
6. highprime
156
01:11.46
7. iovichulo413
57
01:15.24
8. Thrillhou
19
01:20.54
9. Jananana
61
01:23.81
10. Limax 01:36.42
11. Hesper
95
01:41.03
12. zenzaburo 01:44.18
13. bsk5941
111
01:45.06
14. TheET 01:50.05
15. Wenmylii
12
01:50.59
16. fimcg 01:57.77
17. Demeter
197
01:59.36
18. grimmgirlfandom
175
02:11.97
19. Levy
21
02:18.94
20. Vaugnon 02:21.11
Today
1. ojyojyojy
58
01:09.58
2. tt1029
139
01:15.80
3. Limax 01:36.42
4. Wenmylii
12
01:50.59
5. fimcg 01:57.77
6. Hesper
95
02:01.47
7. bsk5941
111
02:08.85
8. KingKahuka 06:27.37
9. Yahagi Shirayuki
31
12:57.69
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
325
00:50.09
2. TashiroMiraki
233
00:51.08
3. gt83
141
00:53.56
4. 강일출
186
01:02.56
5. Mark M.
117
01:02.66
6. sfumato
169
01:02.97
7. Yeti
143
01:04.76
8. Moooon
136
01:06.76
9. Thomas Garner
180
01:07.35
10. mtanzer
140
01:08.67
AO5
1. numbrr
325
00:53.75
2. TashiroMiraki
233
00:53.76
3. gt83
141
00:57.45
4. Mark M.
117
01:05.59
5. 강일출
186
01:07.85
6. Yeti
143
01:08.42
7. mtanzer
140
01:09.99
8. Thomas Garner
180
01:11.20
9. Moooon
136
01:14.07
10. Klunk
24
01:15.24
AO12
1. numbrr
325
01:02.65
2. gt83
141
01:03.90
3. TashiroMiraki
233
01:11.46
4. Yeti
143
01:16.88
5. Thomas Garner
180
01:23.14
6. 강일출
186
01:24.51
7. Mark M.
117
01:25.52
8. mtanzer
140
01:26.99
9. Moooon
136
01:28.65
10. dxjonas
165
01:29.41
Robots / programmatic solversinfo  
1.tlstyer
155
00:00.014
2.siebi
1
00:00.038
3.hum@b0t
91
00:00.169

* 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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