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. marbleeeee 00:02.21
2. Kimseunghyeon 00:02.49
3. loki515
24
00:02.84
4. Nunyabizness 00:02.93
5. PickleCat
39
00:03.29
6. 윤슬
29
00:03.30
7. sauceguardian
97
00:03.33
8. goodman15
12
00:03.35
9. noxcallis 00:03.40
10. DarkChamp 00:03.43
11. Zemmel
77
00:03.46
12. Harry_Canyon
127
00:03.49
13. DdBbon 00:03.60
14. alex0211
9
00:03.62
15. jorekami
85
00:03.73
16. KETJAK
32
00:03.84
17. Piroska9
63
00:03.90
18. Elias Westerbergh
65
00:04.20
19. Chaojie Fu
64
00:04.22
20. Galaxy21
46
00:04.35
This Week
1. Kimseunghyeon 00:02.82
2. 윤슬
29
00:03.30
3. goodman15
12
00:03.35
4. noxcallis 00:03.42
5. DdBbon 00:03.60
6. alex0211
9
00:03.62
7. Piroska9
63
00:03.97
8. Mihnosu
8
00:04.43
9. Hori
4
00:04.94
10. turkhuu
20
00:05.11
11. Toksku 00:05.55
12. NJean926 00:05.85
13. pipifax 00:06.08
14. Otis
35
00:06.26
15. SophieK
32
00:07.19
16. HackMan
107
00:07.82
17. untitled 00:08.74
18. SmallBlack 00:08.78
19. junkdrawer 00:08.83
20. LSQUAREDMATH
28
00:09.28
Today
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MO3
1. jaybrainer
237
00:01.82
2. numbrr
297
00:02.18
3. vowels
216
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
95
00:02.59
10. dkxxznxxx
32
00:02.61
AO5
1. jaybrainer
237
00:01.97
2. numbrr
297
00:02.28
3. vowels
216
00:02.33
4. Arok
112
00:02.36
5. Douglas Shamlin Jr.
693
00:02.58
6. sfumato
166
00:02.59
7. SkyBean1201
95
00:02.61
8. mtanzer
140
00:02.63
9. sauceguardian
97
00:02.67
10. boru
103
00:02.68
AO12
1. jaybrainer
237
00:02.49
2. numbrr
297
00:02.60
3. vowels
216
00:02.67
4. Arok
112
00:02.90
5. sfumato
166
00:02.98
6. Douglas Shamlin Jr.
693
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
120
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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2025-07-09 05:32:05

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