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.

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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

This Month
1. zdz
91
01:00.41
2. TomGuo
151
01:01.31
3. tt1029
110
01:01.97
4. mmmmtra 01:05.31
5. Squid
52
01:07.40
6. zyffr
20
01:12.23
7. Billo93 01:13.61
8. cryptOakmont 01:14.53
9. mmyama
79
01:14.75
10. TheET 01:14.88
11. Hachiman 01:15.35
12. Thrillhou 01:23.17
13. Jovess 01:28.39
14. wamfly
21
01:30.43
15. DdBbon 01:32.12
16. tatiana maslova
17
01:32.32
17. PickleCat
52
01:32.54
18. katrin0000 01:33.51
19. iovichulo413
48
01:35.17
20. JohnNa
24
01:36.77
This Week
1. TomGuo
151
01:01.31
2. mmmmtra 01:05.31
3. Squid
52
01:07.40
4. tt1029
110
01:08.26
5. mmyama
79
01:14.75
6. cryptOakmont 01:23.73
7. wamfly
21
01:30.43
8. katrin0000 01:33.51
9. JohnNa
24
01:36.77
10. KongeBob 01:37.98
11. DdBbon 01:38.40
12. zyffr
20
01:39.09
13. ykykpyk 01:40.80
14. PickleCat
52
01:44.83
15. fimcg 01:53.48
16. husu5 02:14.78
17. Cerine 02:17.19
18. Kimberly Fath
19
02:30.96
19. Kelizo
33
02:35.82
20. bozyslaw67
64
02:37.78
Today
1. Squid
52
01:07.40
2. tt1029
110
01:08.26
3. mmyama
79
01:29.44
4. cryptOakmont 01:29.61
5. JohnNa
24
01:36.77
6. DdBbon 01:38.40
7. fimcg 01:53.48
8. bozyslaw67
64
02:37.78
9. Gigiw
72
03:13.32
10. Ketone1121
21
03:25.89
11. NexuStrling
7
03:35.05
12. acissejelocin
18
03:49.40
13. HackMan
119
04:38.96
14. analili 06:12.98
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. numbrr
305
00:50.09
2. TashiroMiraki
217
00:51.08
3. 강일출
174
01:02.56
4. Mark M.
114
01:02.66
5. sfumato
166
01:02.97
6. Yeti
132
01:04.76
7. gtkrouwel
131
01:05.10
8. mtanzer
140
01:08.67
9. 2015YINJ02
172
01:09.95
10. Thomas Garner
170
01:10.08
AO5
1. numbrr
305
00:53.75
2. TashiroMiraki
217
00:53.76
3. Mark M.
114
01:05.59
4. 강일출
174
01:07.85
5. gtkrouwel
131
01:08.46
6. mtanzer
140
01:09.99
7. Yeti
132
01:10.08
8. Thomas Garner
170
01:12.16
9. Klunk
24
01:15.24
10. dxjonas
142
01:16.00
AO12
1. numbrr
305
01:10.81
2. TashiroMiraki
217
01:11.46
3. gtkrouwel
131
01:14.83
4. Yeti
132
01:21.79
5. Thomas Garner
170
01:23.14
6. 강일출
174
01:24.51
7. Mark M.
114
01:25.52
8. mtanzer
140
01:26.99
9. dxjonas
142
01:29.41
10. Moooon
118
01:34.35
Robots / programmatic solversinfo  
1.tlstyer
137
00:00.014
2.hum@b0t
91
00:00.169
3.preciousmouse
74
00:01.075

* 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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2026-01-06 20:51:10

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