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. Kimseunghyeon 00:13.71
2. 2021zhao07
17
00:15.26
3. Goomy
104
00:15.76
4. mmyama
75
00:16.00
5. Truth-or-Peace
122
00:17.35
6. tufelix367
49
00:17.37
7. Brian Murphy
105
00:17.92
8. AufdemWege
2
00:17.94
9. crema
147
00:21.14
10. pipifax 00:22.97
11. KETJAK
19
00:25.14
12. puzzlingpatzer
78
00:27.39
13. grimmgirlfandom
146
00:28.00
14. Jazka 00:29.53
15. zooandroo
90
00:29.93
16. Airbored3000
10
00:30.64
17. HackMan
98
00:31.74
18. Yern369
15
00:34.07
19. dtyamada
98
00:35.26
20. qobi
221
00:36.53
This Week
1. Kimseunghyeon 00:16.74
2. AufdemWege
2
00:17.94
3. Truth-or-Peace
122
00:19.83
4. pipifax 00:23.99
5. KETJAK
19
00:25.14
6. puzzlingpatzer
78
00:27.89
7. zooandroo
90
00:29.93
8. HackMan
98
00:31.74
9. Goochelaar
103
00:54.40
10. FunAcroFly
53
01:14.70
11. RavenSandcastle 01:16.01
12. yngve 01:21.73
13. Lespring22 01:22.49
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Today
1. RavenSandcastle 01:16.01
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MO3
1. numbrr
289
00:11.24
2. mtanzer
140
00:12.14
3. sfumato
166
00:12.30
4. TashiroMiraki
214
00:12.95
5. Oryn
148
00:13.36
6. gtkrouwel
114
00:13.41
7. Yeti
110
00:14.10
8. vowels
214
00:14.15
9. sauceguardian
95
00:14.22
10. Arok
108
00:14.35
AO5
1. numbrr
289
00:12.27
2. sfumato
166
00:12.81
3. TashiroMiraki
214
00:13.72
4. Oryn
148
00:13.82
5. mtanzer
140
00:14.07
6. gtkrouwel
114
00:14.53
7. qqwref
259
00:14.60
8. sauceguardian
95
00:14.79
9. Yeti
110
00:15.01
10. Nick
217
00:15.32
AO12
1. numbrr
289
00:13.99
2. TashiroMiraki
214
00:14.87
2. sfumato
166
00:14.87
4. mtanzer
140
00:16.17
5. gtkrouwel
114
00:16.35
6. sauceguardian
95
00:16.42
7. Oryn
148
00:16.44
8. qqwref
259
00:17.00
9. Sonar
77
00:17.17
10. Yeti
110
00:17.69
Robots / programmatic solversinfo  
1.tlstyer
109
00:00.007
2.hum@b0t
91
00:00.160
3.penguain
57
00:02.298

* 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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2025-05-02 03:59:25

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