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. zenzaburo 00:50.11
2. gtkrouwel
132
00:51.75
3. tt1029
114
00:57.37
4. TomGuo
151
00:58.68
5. mmyama
79
01:06.67
6. Jamwich
21
01:34.56
7. Froerto3301
40
01:36.57
8. geyik
201
01:39.92
9. random_person
130
01:46.92
10. lauraapzz
74
01:51.38
11. HackMan
122
01:51.53
12. Dorice
261
01:52.82
13. wamfly
21
01:55.39
14. niqnna
18
02:04.53
15. Jazka 02:12.45
16. FCBSophie
65
02:13.24
17. Amator 02:20.74
18. Methyl Red
11
02:21.03
19. Kelizo
34
02:22.95
20. Ebotreson
22
02:23.23
This Week
1. TomGuo
151
00:58.68
2. tt1029
114
01:00.74
3. zenzaburo 01:09.41
4. FCBSophie
65
02:13.24
5. HackMan
122
02:14.69
6. Methyl Red
11
02:21.03
7. AnonyMinor
72
02:24.48
8. Praktisix
121
02:48.59
9. trLBumm
29
03:34.27
10. Ryong L
77
03:39.33
11. nerdvert
97
03:42.43
12. LordHedgie 03:42.75
13. Marialiss
15
06:22.41
14. chenrui
8
09:43.51
15. c1c51
40
23:39.16
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. tt1029
114
01:07.85
2. zenzaburo 01:09.41
3. FCBSophie
65
02:13.24
4. HackMan
122
02:35.84
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
307
00:46.10
2. TashiroMiraki
218
00:47.55
3. gtkrouwel
132
00:48.99
4. sfumato
166
01:01.21
5. qqwref
266
01:05.62
6. Yeti
136
01:06.28
7. Nick
217
01:07.31
8. mtanzer
140
01:10.95
9. 2015YINJ02
174
01:12.11
10. summernight
228
01:12.70
AO5
1. numbrr
307
00:46.10
2. TashiroMiraki
218
00:51.06
3. gtkrouwel
132
00:52.43
4. Yeti
136
01:07.43
5. sfumato
166
01:08.37
6. mtanzer
140
01:11.61
7. qqwref
266
01:13.56
8. tt1029
114
01:13.91
9. summernight
228
01:14.94
10. 2015YINJ02
174
01:15.93
AO12
1. numbrr
307
00:55.85
2. gtkrouwel
132
00:56.02
3. TashiroMiraki
218
00:56.88
4. summernight
228
01:19.65
5. qqwref
266
01:23.77
6. Oryn
167
01:24.66
7. mtanzer
140
01:25.21
8. Yeti
136
01:31.17
9. sfumato
166
01:32.17
10. 2015YINJ02
174
01:33.71
Robots / programmatic solversinfo  
1.tlstyer
140
00:00.011
2.hum@b0t
91
00:00.163
3.cheyette00:02.504

* 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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2026-02-11 19:02:14

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