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. numbrr
306
00:01.94
2. geyik
200
00:03.48
3. yyyyyyyejin
99
00:03.50
4. zenzaburo 00:03.84
5. random_person
126
00:03.86
6. niqnna
18
00:04.33
7. mmyama
79
00:04.60
8. Piroska9
70
00:04.89
9. Ebotreson
17
00:05.01
10. Charlleway
75
00:05.03
11. Hehaho
14
00:05.84
12. WinterBirth
46
00:06.00
13. HackMan
121
00:06.07
14. ohayou 00:06.73
15. LordHedgie 00:07.13
16. Partimento
52
00:07.90
17. EG0hun 00:08.14
18. HollowKing 00:08.86
19. Rickieman86 00:08.87
20. 히원
8
00:08.96
This Week
1. numbrr
306
00:01.94
2. yyyyyyyejin
99
00:03.50
3. zenzaburo 00:03.84
4. niqnna
18
00:04.33
5. Ebotreson
17
00:05.01
6. Piroska9
70
00:05.13
7. HackMan
121
00:06.53
8. ohayou 00:06.73
9. EG0hun 00:08.14
10. HollowKing 00:08.86
11. i'm ly
150
00:09.92
12. LordHedgie 00:10.24
13. prb79
7
00:10.31
14. FCBSophie
60
00:15.62
15. Kenolo353
117
00:15.84
16. Vensluz 00:15.89
17. Uthor 24d 20:31:23.64
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. zenzaburo 00:04.04
2. niqnna
18
00:04.33
3. ohayou 00:06.73
4. HackMan
121
00:13.37
5. FCBSophie
60
00:15.62
6. Kenolo353
117
00:15.84
7. Vensluz 00:15.89
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. numbrr
306
00:02.41
2. jaybrainer
248
00:02.52
3. vowels
216
00:02.71
4. Arok
115
00:02.86
5. Yeti
134
00:02.89
6. mtanzer
140
00:03.06
6. Douglas Shamlin Jr.
716
00:03.06
8. gtkrouwel
132
00:03.18
9. nabi
92
00:03.21
10. TashiroMiraki
217
00:03.43
AO5
1. numbrr
306
00:02.62
2. jaybrainer
248
00:02.75
3. vowels
216
00:03.02
4. Douglas Shamlin Jr.
716
00:03.09
5. Yeti
134
00:03.20
6. Arok
115
00:03.23
7. mtanzer
140
00:03.25
7. nabi
92
00:03.25
9. TashiroMiraki
217
00:03.59
10. gtkrouwel
132
00:03.68
AO12
1. numbrr
306
00:03.28
2. jaybrainer
248
00:03.30
3. Yeti
134
00:03.69
4. vowels
216
00:03.83
5. mtanzer
140
00:03.89
6. Arok
115
00:04.12
7. gtkrouwel
132
00:04.27
8. Douglas Shamlin Jr.
716
00:04.52
9. sfumato
166
00:04.54
10. Oryn
166
00:04.57
Robots / programmatic solversinfo  
1.tlstyer
137
00:00.007
2.cheyette00:00.108
3.hum@b0t
91
00:00.158

* 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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2026-01-26 17:51:55

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