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. LemonSherbet 00:03.78
2. niqnna
18
00:04.43
3. stevethesquid
70
00:04.45
4. Piroska9
69
00:05.09
5. thall
53
00:05.17
6. cryptOakmont 00:05.20
7. crema
232
00:08.57
7. Kelizo
30
00:08.57
9. Axiomatically_confus...
20
00:09.78
10. Nyauchoo
9
00:09.94
11. tonyjo4312
33
00:10.25
12. Truth-or-Peace
125
00:10.53
13. amdo1 00:10.73
14. arod97
35
00:11.76
15. AuroraSrc
19
00:11.92
16. thrasymachus
53
00:12.03
17. 3328037
62
00:12.39
18. jordan12 00:12.65
19. llmt9
87
00:13.53
20. Milonia
18
00:15.43
This Week
1. LemonSherbet 00:03.78
2. stevethesquid
70
00:04.45
3. thall
53
00:05.17
4. cryptOakmont 00:05.20
5. niqnna
18
00:05.65
6. Axiomatically_confus...
20
00:09.78
7. tonyjo4312
33
00:10.25
8. thrasymachus
53
00:12.03
9. llmt9
87
00:13.53
10. fishysua
153
00:21.55
11. TheRealSavikivi
5
00:35.07
12. 070426ly
19
00:39.45
13. oddmaude
18
00:44.65
14. growlxy
6
00:46.07
15. PetitSouris
11
02:00.94
16. TachibanaNya 02:12.64
17. Nyauchoo
9
9d 07:43:29.56
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Today
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7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
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MO3
1. numbrr
302
00:02.83
2. vowels
216
00:03.01
3. mtanzer
140
00:03.39
4. jaybrainer
244
00:03.47
5. TashiroMiraki
217
00:03.58
6. Yeti
129
00:03.87
7. gtkrouwel
129
00:04.13
8. Klunk
24
00:04.23
9. Nick
217
00:04.31
10. Oryn
163
00:04.33
AO5
1. vowels
216
00:03.35
2. numbrr
302
00:03.52
3. mtanzer
140
00:03.83
4. Yeti
129
00:04.15
5. TashiroMiraki
217
00:04.25
6. gtkrouwel
129
00:04.29
7. jaybrainer
244
00:04.33
8. Klunk
24
00:04.42
9. Oryn
163
00:04.65
10. Asitukl
20
00:04.73
AO12
1. numbrr
302
00:04.19
2. vowels
216
00:04.71
3. gtkrouwel
129
00:04.88
4. mtanzer
140
00:05.02
5. Oryn
163
00:05.62
6. TashiroMiraki
217
00:05.86
7. Nick
217
00:05.93
8. jaybrainer
244
00:06.26
9. Yeti
129
00:06.50
10. sfumato
166
00:06.53
Robots / programmatic solversinfo  
1.tlstyer
136
00:00.007
2.cheyette00:00.115
3.hum@b0t
91
00:00.159

* 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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2025-12-06 04:59:08

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