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. Eskimosnake
108
00:02.91
2. beatrixwashere
108
00:02.99
3. LemonSherbet 00:03.11
4. Albepm
17
00:03.76
5. Dorice
246
00:03.86
6. Parade
39
00:04.41
7. thrasymachus
30
00:04.76
8. yellow0607
22
00:05.06
9. Piroska9
65
00:05.11
10. Half_Line
22
00:05.52
11. jjconroy506
17
00:05.89
12. sway85
18
00:05.92
13. niqnna
18
00:06.00
14. SophieK
41
00:07.11
15. Asitukl
10
00:08.09
16. FunAcroFly
87
00:08.15
17. LockedKey
76
00:08.88
18. angelrose971
94
00:09.51
19. Ripebike
21
00:10.58
20. 淳粹淳迷
19
00:10.82
This Week
1. LemonSherbet 00:03.81
2. Eskimosnake
108
00:04.29
3. yellow0607
22
00:05.06
4. niqnna
18
00:06.61
5. Dorice
246
00:08.06
6. Asitukl
10
00:08.09
7. U4v5n6
18
00:11.81
8. Goochelaar
105
00:15.34
9. Anna Redzik
46
00:21.02
10. LLL159 00:40.65
11. Partimento
34
00:46.09
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Today
1. Partimento
34
00:46.09
2.--- empty -----:--
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
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MO3
1. numbrr
300
00:02.49
2. AnzaJoinDiscord
240
00:02.68
3. vowels
216
00:02.71
4. Arok
113
00:02.86
5. Yeti
118
00:03.03
6. mtanzer
140
00:03.06
6. Douglas Shamlin Jr.
704
00:03.06
8. nabi
92
00:03.21
9. TashiroMiraki
216
00:03.43
10. Klunk
24
00:03.64
AO5
1. numbrr
300
00:02.73
2. AnzaJoinDiscord
240
00:02.75
3. vowels
216
00:03.02
4. Douglas Shamlin Jr.
704
00:03.09
5. Arok
113
00:03.23
6. mtanzer
140
00:03.25
6. nabi
92
00:03.25
8. TashiroMiraki
216
00:03.59
9. Klunk
24
00:03.74
10. Oryn
152
00:03.84
AO12
1. numbrr
300
00:03.28
2. AnzaJoinDiscord
240
00:03.30
3. vowels
216
00:03.83
4. mtanzer
140
00:03.89
5. Arok
113
00:04.12
6. Douglas Shamlin Jr.
704
00:04.52
7. sfumato
166
00:04.54
8. Oryn
152
00:04.57
9. TashiroMiraki
216
00:04.58
10. Klunk
24
00:04.81
Robots / programmatic solversinfo  
1.tlstyer
126
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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2025-08-29 14:38:39

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