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
195
00:57.16
2. tt1029
141
00:59.28
3. DarkChamp 01:00.00
4. zenzaburo 01:04.34
5. iovichulo413
57
01:05.39
6. Yeti
143
01:06.12
7. highprime
157
01:08.00
8. Hachiman 01:09.00
9. ojyojyojy
59
01:09.58
10. xxbh02jf 01:16.07
11. Hesper
97
01:19.47
12. Thrillhou
20
01:20.54
13. KongeBob 01:20.84
14. Jananana
62
01:23.81
15. baimouren
100
01:26.81
16. erichiro 01:32.80
17. Limax 01:36.42
18. bsk5941
113
01:38.08
19. nbapip 01:40.95
20. xiang10231
22
01:46.11
This Week
1. tt1029
141
01:03.87
2. iovichulo413
57
01:05.39
3. highprime
157
01:13.76
4. Hesper
97
01:19.47
5. Jananana
62
01:26.53
6. erichiro 01:32.80
7. Thrillhou
20
01:34.08
8. Limax 01:36.93
9. Ketone1121
33
01:46.77
10. fimcg 01:52.38
11. bwangarang
73
01:54.35
12. Levy
25
01:57.61
13. Vaugnon 02:16.02
14. HackMan
127
02:29.01
15. bsk5941
113
02:38.09
16. kanon
60
02:43.56
17. Cerine 02:44.62
18. aequidens
275
02:47.13
19. danpuzzler 02:52.33
20. Kelizo
46
03:07.08
Today
1. tt1029
141
01:03.87
2. highprime
157
01:13.76
3. Jananana
62
01:26.53
4. Cerine 02:44.62
5. danpuzzler 02:52.33
6. HackMan
127
04:50.22
7. carukh 06:09.96
8. WYJ
106
06:47.52
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
325
00:50.09
2. TashiroMiraki
234
00:51.08
3. gt83
142
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
137
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
234
00:53.76
3. gt83
142
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
137
01:14.07
10. Klunk
24
01:15.24
AO12
1. numbrr
325
01:02.65
2. gt83
142
01:03.90
3. TashiroMiraki
234
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
137
01:28.65
10. dxjonas
165
01:29.41
Robots / programmatic solversinfo  
1.tlstyer
156
00:00.014
2.siebi
1
00:00.038
3.GrandMole
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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