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. DarkChamp 00:50.27
2. TomGuo
152
00:52.01
3. tt1029
117
00:58.06
4. zdz
93
01:02.65
5. zenzaburo 01:03.52
6. Squid
54
01:15.25
7. highprime
135
01:17.25
8. Twipsii 01:20.78
9. cryptOakmont 01:22.27
10. Billo93 01:24.85
11. DdBbon 01:27.41
12. Thrillhou 01:27.57
13. Candyman 01:29.35
14. crema
261
01:36.86
15. iovichulo413
50
01:38.43
16. xxbh02jf 01:41.17
17. SoiTrang
82
01:44.73
18. random_person
132
01:44.77
19. Ontwikseltsaar
98
01:46.31
20. wldnekz1 01:49.23
This Week
1. TomGuo
152
00:56.36
2. tt1029
117
01:03.07
3. zenzaburo 01:05.90
4. highprime
135
01:17.25
5. DdBbon 01:32.02
6. Candyman 01:34.62
7. iovichulo413
50
01:38.43
8. durugyakos 01:52.78
9. wldnekz1 02:07.32
10. snaphiss
92
02:12.90
11. aequidens
262
02:24.50
12. nbapip 02:27.80
13. wamfly
21
02:30.95
14. hiptopoker 02:31.51
15. sue
47
02:32.26
16. bozyslaw67
64
02:34.40
17. Gigiw
81
02:43.09
18. peeps469
12
02:47.70
19. Angelila 02:48.57
20. PickleCat
54
02:51.06
Today
1. tt1029
117
01:20.51
2. qobi
234
06:03.95
3. Jiangxq
4
06:43.24
4.--- empty -----:--
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
309
00:50.09
2. TashiroMiraki
220
00:51.08
3. 강일출
176
01:02.56
4. Mark M.
114
01:02.66
5. sfumato
166
01:02.97
6. Yeti
138
01:04.76
7. gtkrouwel
133
01:05.10
8. mtanzer
140
01:08.67
9. 2015YINJ02
177
01:09.95
10. Thomas Garner
172
01:10.08
AO5
1. numbrr
309
00:53.75
2. TashiroMiraki
220
00:53.76
3. Mark M.
114
01:05.59
4. 강일출
176
01:07.85
5. gtkrouwel
133
01:08.46
6. mtanzer
140
01:09.99
7. Yeti
138
01:10.08
8. Thomas Garner
172
01:12.16
9. Klunk
24
01:15.24
10. dxjonas
147
01:16.00
AO12
1. numbrr
309
01:10.81
2. TashiroMiraki
220
01:11.46
3. gtkrouwel
133
01:14.83
4. Yeti
138
01:21.79
5. Thomas Garner
172
01:23.14
6. 강일출
176
01:24.51
7. Mark M.
114
01:25.52
8. mtanzer
140
01:26.99
9. dxjonas
147
01:29.41
10. Moooon
122
01:34.07
Robots / programmatic solversinfo  
1.tlstyer
141
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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2026-03-08 03:38:15

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