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

This Month
1. Mayrink 00:57.08
2. TomGuo
149
01:00.65
3. tt1029
104
01:04.01
4. Hachiman 01:07.49
5. TheET 01:18.32
6. Billo93 01:18.45
7. mmmmtra 01:20.24
8. zyffr
20
01:22.44
9. PickleCat
49
01:25.30
10. jorekami
89
01:25.75
11. Thrillhou 01:27.15
12. katrin0000 01:27.34
13. daklqw
33
01:30.17
14. Arok
115
01:30.97
15. Hashibrown 01:31.71
16. xxbh02jf 01:37.30
17. sue
45
01:37.71
18. wamfly
19
01:40.64
19. LemonSherbet 01:41.04
20. Squid
44
01:41.46
This Week
1. TomGuo
149
01:00.65
2. tt1029
104
01:04.18
3. Hachiman 01:18.29
4. jorekami
89
01:25.75
5. katrin0000 01:27.34
6. Thrillhou 01:33.27
7. wamfly
19
01:40.64
8. Squid
44
01:41.46
9. Hesper
72
01:56.30
10. DdBbon 01:57.49
11. Jovess 02:05.65
12. KWLUNA
11
02:22.42
13. amdo1 02:28.54
14. LesAM 02:30.07
15. niqnna
18
02:33.36
16. bwangarang
70
02:38.76
17. mopon 02:43.85
18. sue
45
02:54.36
19. ZJTZLQLJY 02:58.47
20. zahir
12
03:00.81
Today
1. tt1029
104
01:11.90
2. analili 04:27.93
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MO3
1. numbrr
301
00:50.09
2. TashiroMiraki
217
00:51.08
3. 강일출
172
01:02.56
4. Mark M.
114
01:02.66
5. sfumato
166
01:02.97
6. gtkrouwel
128
01:05.10
7. mtanzer
140
01:08.67
8. 2015YINJ02
169
01:09.95
9. Thomas Garner
169
01:10.08
10. dxjonas
137
01:13.39
AO5
1. numbrr
301
00:53.75
2. TashiroMiraki
217
00:53.76
3. Mark M.
114
01:05.59
4. 강일출
172
01:07.85
5. gtkrouwel
128
01:08.46
6. mtanzer
140
01:09.99
7. Thomas Garner
169
01:12.16
8. Klunk
24
01:15.24
9. dxjonas
137
01:16.00
10. summernight
223
01:17.11
AO12
1. numbrr
301
01:10.81
2. TashiroMiraki
217
01:11.46
3. gtkrouwel
128
01:14.83
4. Thomas Garner
169
01:23.14
5. 강일출
172
01:24.51
6. Mark M.
114
01:25.52
7. mtanzer
140
01:26.99
8. dxjonas
137
01:29.41
9. Moooon
116
01:34.35
10. Yeti
122
01:34.48
Robots / programmatic solversinfo  
1.tlstyer
135
00:00.014
2.hum@b0t
91
00:00.169
3.preciousmouse
73
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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2025-11-09 11:34:53

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