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. tt1029
142
01:02.78
2. Hachiman 01:03.56
3. zenzaburo 01:04.34
4. iovichulo413
57
01:05.39
5. Oryn
198
01:05.81
6. highprime
161
01:08.00
7. ojyojyojy
61
01:09.58
8. Rudy4209
49
01:14.56
9. 飞飞
55
01:16.33
10. Hesper
100
01:17.86
11. DdBbon 01:19.45
12. Thrillhou
20
01:20.54
13. Limax 01:22.64
14. Jananana
63
01:23.81
15. kennethaw88
165
01:25.66
16. baimouren
102
01:26.56
17. Froerto3301
50
01:29.63
18. erichiro 01:32.80
19. SuaveGeyser
44
01:34.79
20. Aysha
115
01:35.88
This Week
1. tt1029
142
01:04.15
2. Hachiman 01:08.85
3. highprime
161
01:12.38
4. Hesper
100
01:17.86
5. zenzaburo 01:18.62
6. Limax 01:22.64
7. baimouren
102
01:26.56
8. Jananana
63
01:27.90
9. Froerto3301
50
01:29.63
10. Aysha
115
01:35.88
11. durugyakos 01:38.20
12. kennethaw88
165
01:45.43
13. Ketone1121
34
01:50.91
14. Oryn
198
01:56.00
15. tanbofan 01:59.19
16. MuxxPedri 02:20.81
17. Danila54RUS 02:21.60
18. CrlD
124
02:26.96
19. KETJAK
46
02:27.13
20. 不倒霉
12
02:29.26
Today
1. tt1029
142
01:08.17
2. Hachiman 01:11.20
3. zenzaburo 01:18.62
4. Limax 01:22.64
5. Hesper
100
01:30.51
6. durugyakos 01:38.20
7. CrlD
124
02:26.96
8. amdo1 03:26.35
9. Kelizo
47
04:08.60
10. Robot65566
173
04:12.55
11. 999111 06:19.69
12.--- empty -----:--
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14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
328
00:50.09
2. TashiroMiraki
234
00:51.08
3. gt83
143
00:53.56
4. 강일출
187
01:02.56
5. Mark M.
117
01:02.66
6. sfumato
169
01:02.97
7. Yeti
143
01:04.76
8. Moooon
138
01:06.76
9. Thomas Garner
181
01:07.35
10. mtanzer
140
01:08.67
AO5
1. numbrr
328
00:53.75
2. TashiroMiraki
234
00:53.76
3. gt83
143
00:57.45
4. Mark M.
117
01:05.59
5. 강일출
187
01:07.85
6. Yeti
143
01:08.42
7. mtanzer
140
01:09.99
8. Thomas Garner
181
01:11.20
9. Moooon
138
01:14.07
10. Klunk
24
01:15.24
AO12
1. numbrr
328
01:02.65
2. gt83
143
01:03.90
3. TashiroMiraki
234
01:11.46
4. Yeti
143
01:16.88
5. Thomas Garner
181
01:23.14
6. 강일출
187
01:24.51
7. Moooon
138
01:24.74
8. Mark M.
117
01:25.52
9. mtanzer
140
01:26.99
10. dxjonas
167
01:29.41
Robots / programmatic solversinfo  
1.tlstyer
158
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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