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. tt1029
98
00:56.24
2. TomGuo
148
01:00.78
3. FWing 01:03.16
4. tantanaaa
78
01:05.02
5. mmmmtra 01:06.46
6. Mayrink 01:13.31
7. Hachiman 01:16.00
8. TheET 01:17.67
9. PickleCat
47
01:25.61
10. Billo93 01:27.76
11. Thrillhou 01:28.96
12. LemonSherbet 01:30.99
13. jorekami
87
01:31.74
14. mmyama
78
01:33.44
15. DdBbon 01:34.18
16. highprime
117
01:35.74
17. Freakazoyd
76
01:35.76
18. sue
44
01:37.43
19. Arok
113
01:37.46
20. goodman15
15
01:38.60
This Week
1. tt1029
98
01:02.82
2. FWing 01:03.16
3. mmmmtra 01:06.46
4. PickleCat
47
01:36.56
5. Thrillhou 01:43.06
6. DdBbon 01:45.50
7. zyffr
20
01:49.73
8. Hesper
67
01:53.77
9. Momo Chou
50
01:56.94
10. amdo1 01:59.52
11. chenh 02:10.57
12. AzuReVaPouR 02:16.75
13. sue
44
02:23.84
14. Gigiw
60
02:28.08
15. biancashing 02:31.22
16. niqnna
18
02:31.47
17. mopon 02:35.44
18. Jovess 02:39.63
19. hiptopoker 02:47.42
20. Kelizo
25
02:50.21
Today
1. tt1029
98
01:22.65
2. biancashing 02:31.22
3. chenh 02:49.98
4. mopon 03:10.85
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
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
300
00:50.09
2. TashiroMiraki
216
00:51.08
3. 강일출
170
01:02.56
4. Mark M.
112
01:02.66
5. sfumato
166
01:02.97
6. gtkrouwel
122
01:05.10
7. mtanzer
140
01:08.67
8. 2015YINJ02
161
01:09.95
9. Thomas Garner
167
01:10.08
10. dxjonas
133
01:13.39
AO5
1. numbrr
300
00:53.75
2. TashiroMiraki
216
00:53.76
3. Mark M.
112
01:05.59
4. 강일출
170
01:07.85
5. gtkrouwel
122
01:08.46
6. mtanzer
140
01:09.99
7. Thomas Garner
167
01:12.16
8. Klunk
24
01:15.24
9. dxjonas
133
01:16.00
10. summernight
215
01:17.11
AO12
1. numbrr
300
01:10.81
2. TashiroMiraki
216
01:11.46
3. gtkrouwel
122
01:14.83
4. Thomas Garner
167
01:23.14
5. 강일출
170
01:24.51
6. Mark M.
112
01:25.52
7. mtanzer
140
01:26.99
8. dxjonas
133
01:29.41
9. Moooon
115
01:34.35
10. Yeti
119
01:34.48
Robots / programmatic solversinfo  
1.tlstyer
128
00:00.014
2.hum@b0t
91
00:00.169
3.preciousmouse
72
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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2025-09-18 07:58:40

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