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. gtkrouwel
139
 00:02.31
2. zenzaburo 00:02.60
3. sway85
23
 00:02.75
4. nacho
45
 00:02.79
5. haddekk
15
 00:02.96
5. lavaduck
33
 00:02.96
7. CamPuzzle
39
 00:03.01
8. Lovrenac
4
 00:03.02
9. daftpunkfan2009 00:03.09
10. niqnna
18
 00:03.20
11. oracle3000 00:03.27
11. avit
20
 00:03.27
13. Zangzihan 00:03.34
14. DdBbon 00:03.49
15. beznickowy 00:03.62
16. Piroska9
76
 00:03.63
17. Scr33n 00:03.67
18. flowerbloom 00:03.70
19. eclipseloch
7
 00:03.83
20. milkomeda
10
 00:03.96
This Week
1. zenzaburo 00:02.60
2. nacho
45
 00:02.79
3. lavaduck
33
 00:02.96
4. Lovrenac
4
 00:03.02
5. DdBbon 00:03.49
6. niqnna
18
 00:03.69
7. eclipseloch
7
 00:03.83
8. oracle3000 00:04.12
9. HackMan
124
 00:04.18
10. canismajoris 00:04.26
11. jxycxlyn 00:04.36
12. JayeKimZ
29
 00:04.59
13. hppkss
19
 00:05.16
14. NickNikolov 00:05.46
15. pipifax 00:05.90
16. dbut2
43
 00:06.11
17. penguin0206 00:06.13
18. MuxxPedri 00:06.46
19. petsku69
21
 00:06.48
20. J0chem0o 00:06.62
Today
1. lavaduck
33
 00:02.96
2. niqnna
18
 00:03.86
3. dbut2
43
 00:06.11
4. J0chem0o 00:06.62
5. smag
11
 00:10.26
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. jaybrainer
275
 00:01.82
2. numbrr
322
 00:02.18
3. vowels
216
 00:02.19
4. Arok
115
 00:02.20
5. boru
132
 00:02.26
6. Yeti
142
 00:02.28
7. 2015YINJ02
187
 00:02.45
8. sfumato
168
 00:02.50
8. mtanzer
140
 00:02.50
10. BingBongBob
108
 00:02.53
AO5
1. jaybrainer
275
 00:01.97
2. numbrr
322
 00:02.28
3. vowels
216
 00:02.33
4. Yeti
142
 00:02.35
5. Arok
115
 00:02.36
6. 2015YINJ02
187
 00:02.37
6. boru
132
 00:02.37
8. Douglas Shamlin Jr.
722
 00:02.58
9. sfumato
168
 00:02.59
10. SkyBean1201
120
 00:02.61
AO12
1. jaybrainer
275
 00:02.44
2. numbrr
322
 00:02.60
3. vowels
216
 00:02.67
4. Yeti
142
 00:02.72
5. 2015YINJ02
187
 00:02.77
6. Arok
115
 00:02.90
7. sfumato
168
 00:02.98
8. Douglas Shamlin Jr.
722
 00:03.00
9. mtanzer
140
 00:03.09
10. sauceguardian
109
 00:03.18
Robots / programmatic solversinfo  
1.siebi
1
00:00.006
1.tlstyer
151
00:00.006
3.cheyette00:00.109

* 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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