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

New Puzzle
This Month
1. zenzaburo 00:07.77
2. BeccaWorm
127
00:10.25
3. niqnna
18
00:10.82
4. LordHedgie 00:11.33
5. Thrillhou
7
00:11.46
6. Robot65566
141
00:16.49
7. grimmgirlfandom
170
00:17.30
8. Zangzihan 00:18.44
9. MushroomsCavern
81
00:20.62
10. llmt9
94
00:20.63
11. Odenzon
31
00:20.81
12. ChanTP
35
00:24.46
13. Victorious1
203
00:24.87
14. SWICT
51
00:26.33
15. xilli 00:29.49
16. Charlie42
115
00:29.75
17. Pissumurone 00:30.57
18. vipinjain
34
00:31.00
19. AnnaCL8
34
00:37.63
20. emeraldnight
7
00:39.58
This Week
1. zenzaburo 00:08.35
2. niqnna
18
00:11.10
3. grimmgirlfandom
170
00:17.30
4. Zangzihan 00:18.44
5. llmt9
94
00:25.94
6. xilli 00:29.49
7. Charlie42
115
00:29.75
8. vipinjain
34
00:31.00
9. cowtown 00:51.34
10. Odenzon
31
00:59.75
11. Lockrz 01:57.29
12. EG0hun 02:09.13
13. badshaa
90
02:26.58
14. Zrc1009
3
12:31.58
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MO3
1. numbrr
318
00:06.14
2. mtanzer
140
00:07.85
3. Yeti
140
00:08.00
4. gtkrouwel
135
00:08.31
5. sfumato
167
00:08.86
6. TashiroMiraki
226
00:09.14
7. tantanaaa
102
00:09.15
8. Oryn
176
00:09.76
9. jaybrainer
263
00:09.79
10. summernight
233
00:10.20
AO5
1. numbrr
318
00:06.14
2. Yeti
140
00:08.21
3. mtanzer
140
00:08.33
4. TashiroMiraki
226
00:08.83
5. gtkrouwel
135
00:09.11
6. Oryn
176
00:09.98
7. jaybrainer
263
00:10.30
8. 飞飞
52
00:10.62
9. sfumato
167
00:11.16
10. summernight
233
00:11.67
AO12
1. numbrr
318
00:07.90
2. mtanzer
140
00:10.60
3. TashiroMiraki
226
00:11.63
4. gtkrouwel
135
00:12.37
5. Yeti
140
00:12.88
6. summernight
233
00:14.51
7. 2015YINJ02
181
00:15.17
8. sfumato
167
00:15.19
9. qqwref
266
00:16.68
10. Oryn
176
00:17.33
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.007
2.hum@b0t
91
00:00.161
3.cheyette00:00.184

* 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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