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. BingBongBob
108
00:02.04
2. Arok
112
00:02.11
3. marbleeeee 00:02.14
4. Kimseunghyeon 00:02.49
5. KETJAK
28
00:02.62
6. hzy1025
44
00:02.74
7. DarkChamp 00:02.87
8. sauceguardian
97
00:02.91
9. sunflower554
5
00:02.92
10. Nunyabizness 00:02.93
11. 2021zhao07
22
00:03.02
12. novas.eclipse
5
00:03.03
13. Kaizer1824#0246
60
00:03.10
14. Sinnaruil 00:03.26
15. sue
39
00:03.29
15. PickleCat
31
00:03.29
17. OuO Seal
9
00:03.38
18. mmmmtra 00:03.60
19. noxcallis 00:03.62
20. beznickowy 00:03.83
This Week
1. Kimseunghyeon 00:02.73
2. Nunyabizness 00:02.93
3. PickleCat
31
00:03.29
4. sauceguardian
97
00:03.33
5. noxcallis 00:03.62
6. I. A. L. M. +
8
00:04.59
7. fimcg 00:04.80
8. Ermouf
83
00:05.20
9. DdBbon 00:05.67
10. 喵緹
17
00:06.04
11. PheromoneJones 00:06.17
12. Savana 00:06.75
13. HackMan
104
00:06.84
14. Parade
8
00:07.00
15. Liza94You 00:07.29
16. Solander
57
00:07.69
17. LSQUAREDMATH
27
00:08.26
18. Rygs192
14
00:09.32
19. RkRs21
11
00:09.36
20. nbapip 00:09.47
Today
1. LSQUAREDMATH
27
00:09.76
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MO3
1. jaybrainer
234
00:01.83
2. numbrr
295
00:02.18
3. vowels
215
00:02.19
4. Arok
112
00:02.20
5. sfumato
166
00:02.50
5. mtanzer
140
00:02.50
7. BingBongBob
108
00:02.53
8. qqwref
259
00:02.55
9. SkyBean1201
90
00:02.59
10. dkxxznxxx
31
00:02.61
AO5
1. jaybrainer
234
00:01.97
2. numbrr
295
00:02.28
3. vowels
215
00:02.33
4. Arok
112
00:02.36
5. Douglas Shamlin Jr.
691
00:02.58
6. sfumato
166
00:02.59
7. SkyBean1201
90
00:02.61
8. mtanzer
140
00:02.63
9. sauceguardian
97
00:02.67
10. boru
103
00:02.68
AO12
1. jaybrainer
234
00:02.49
2. numbrr
295
00:02.60
3. vowels
215
00:02.67
4. Arok
112
00:02.90
5. sfumato
166
00:02.98
6. Douglas Shamlin Jr.
691
00:03.00
7. mtanzer
140
00:03.09
8. sauceguardian
97
00:03.18
9. TashiroMiraki
215
00:03.27
10. qqwref
259
00:03.28
Robots / programmatic solversinfo  
1.tlstyer
118
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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2025-06-19 02:36:45

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