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 00:05.96
2. grimmgirlfandom
170
00:06.62
3. niqnna
18
00:06.81
4. Momiji142857
19
00:07.76
5. SWICT
51
00:08.36
6. BeccaWorm
127
00:08.41
7. Pablo The Penguin
13
00:08.58
8. pipifax 00:08.93
9. Einsteinus
121
00:09.06
10. Daehyeok Kwon
53
00:09.84
11. kennethaw88
155
00:10.26
12. barruf
125
00:11.21
13. Strider500
113
00:11.30
14. Thrillhou
7
00:11.41
15. pph4br
14
00:12.26
16. Zangzihan 00:12.28
17. LordHedgie 00:12.93
18. paejunk
57
00:13.07
19. cowtown 00:13.14
20. HackMan
123
00:13.17
This Week
1. grimmgirlfandom
170
00:06.62
2. zenzaburo 00:07.61
3. niqnna
18
00:07.73
4. Einsteinus
121
00:09.24
5. kennethaw88
155
00:10.26
6. BeccaWorm
127
00:11.40
7. Zangzihan 00:12.28
8. pipifax 00:13.00
9. cowtown 00:13.14
10. Macy
59
00:14.70
11. paejunk
57
00:16.56
12. vipinjain
34
00:18.49
13. ambiorix 00:18.66
14. eloiiiiise
40
00:19.61
15. chrispy
77
00:31.93
16. laries
41
00:43.17
17. EG0hun 00:56.51
18. Adrianqin
9
01:10.29
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MO3
1. numbrr
318
00:04.21
2. Yeti
140
00:05.19
3. vowels
216
00:05.21
4. mtanzer
140
00:05.22
5. Arok
115
00:05.24
6. gtkrouwel
135
00:05.36
7. sfumato
167
00:05.44
8. sauceguardian
106
00:05.81
9. TashiroMiraki
226
00:05.91
10. PuzzleMaestro
92
00:05.94
AO5
1. numbrr
318
00:04.76
2. gtkrouwel
135
00:05.49
3. Yeti
140
00:05.87
4. mtanzer
140
00:05.96
5. sfumato
167
00:06.02
6. Arok
115
00:06.06
7. TashiroMiraki
226
00:06.18
8. sauceguardian
106
00:06.20
9. vowels
216
00:06.31
10. jaybrainer
263
00:06.33
AO12
1. numbrr
318
00:05.38
2. Yeti
140
00:06.20
3. gtkrouwel
135
00:06.29
4. sfumato
167
00:06.43
5. mtanzer
140
00:06.94
5. Arok
115
00:06.94
7. TashiroMiraki
226
00:07.08
8. sauceguardian
106
00:07.10
9. qqwref
266
00:07.20
10. Douglas Shamlin Jr.
720
00:07.34
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.006
2.cheyette00:00.141
3.hum@b0t
91
00:00.160

* 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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