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 00:02.50
1. Fjznbeinfnn 00:02.50
3. Wangxuye 00:02.52
4. sway85
22
00:02.54
5. TheDogMan
7
00:02.61
6. daklqw
33
00:02.63
7. Ada Westerberg
12
00:02.67
8. kennethaw88
152
00:02.81
9. Truth-or-Peace
124
00:03.03
10. Emgold 00:03.16
11. AufdemWege
2
00:03.37
12. XiaoXin1113
29
00:03.43
13. hazzle 00:03.45
14. Thrillhou 00:03.49
15. Freakazoyd
78
00:03.51
16. Jack Choi
8
00:03.56
16. niqnna
18
00:03.56
18. noxcallis 00:03.58
19. Tmoney69 00:03.60
20. yyyyyyyejin
85
00:03.66
This Week
1. LemonSherbet 00:02.50
1. Fjznbeinfnn 00:02.50
3. TheDogMan
7
00:02.61
4. sway85
22
00:02.73
5. Wangxuye 00:03.23
6. AufdemWege
2
00:03.37
7. Freakazoyd
78
00:03.51
8. Piroska9
68
00:03.71
9. niqnna
18
00:04.18
10. MushroomsCavern
11
00:04.36
10. jjsw0204
13
00:04.36
10. Milonia
9
00:04.36
13. Skallos
37
00:04.56
14. Thrillhou 00:04.62
15. 时征
21
00:04.73
16. Cricketwithagun
18
00:04.76
17. dtyamada
106
00:05.52
18. HoneyBee3 00:06.18
19. Toksku 00:06.25
20. LSQUAREDMATH
29
00:07.66
Today
1. PeeinPotty 00:07.74
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8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
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20.--- empty -----:--
MO3
1. jaybrainer
242
00:01.82
2. numbrr
301
00:02.18
3. vowels
216
00:02.19
4. Arok
115
00:02.20
5. sfumato
166
00:02.50
5. mtanzer
140
00:02.50
7. BingBongBob
108
00:02.53
8. qqwref
261
00:02.55
9. SkyBean1201
109
00:02.59
10. dkxxznxxx
32
00:02.61
AO5
1. jaybrainer
242
00:01.97
2. numbrr
301
00:02.28
3. vowels
216
00:02.33
4. Arok
115
00:02.36
5. Douglas Shamlin Jr.
714
00:02.58
6. sfumato
166
00:02.59
7. SkyBean1201
109
00:02.61
8. mtanzer
140
00:02.63
9. sauceguardian
101
00:02.67
10. boru
112
00:02.68
AO12
1. jaybrainer
242
00:02.49
2. numbrr
301
00:02.60
3. vowels
216
00:02.67
4. Arok
115
00:02.90
5. sfumato
166
00:02.98
6. Douglas Shamlin Jr.
714
00:03.00
7. mtanzer
140
00:03.09
8. sauceguardian
101
00:03.18
9. Yeti
121
00:03.25
10. TashiroMiraki
217
00:03.27
Robots / programmatic solversinfo  
1.tlstyer
134
00:00.006
2.cheyette00:00.109
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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2025-11-02 05:55:39

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