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 00:02.14
2. Kimseunghyeon 00:02.49
3. KETJAK
31
00:02.62
4. hzy1025
44
00:02.74
5. loki515
24
00:02.84
6. Nunyabizness 00:02.93
7. Sinnaruil 00:03.26
8. PickleCat
38
00:03.29
9. 윤슬
28
00:03.30
10. sauceguardian
97
00:03.33
11. goodman15
10
00:03.35
12. noxcallis 00:03.40
13. DarkChamp 00:03.43
14. Zemmel
77
00:03.46
15. Harry_Canyon
126
00:03.49
16. mmmmtra 00:03.60
17. alex0211
9
00:03.62
18. jorekami
85
00:03.73
19. Piroska9
63
00:03.90
20. Elias Westerbergh
63
00:04.20
This Week
1. loki515
24
00:02.84
2. Kimseunghyeon 00:03.00
3. 윤슬
28
00:03.30
4. goodman15
10
00:03.35
5. noxcallis 00:03.42
6. Zemmel
77
00:03.46
7. Harry_Canyon
126
00:03.49
8. alex0211
9
00:03.62
9. Piroska9
63
00:03.97
10. Chaojie Fu
64
00:04.22
11. Mihnosu
7
00:04.43
12. Dorice
242
00:04.45
13. Hori
4
00:04.94
14. turkhuu
20
00:05.11
15. ddcsj
6
00:06.05
16. Otis
34
00:06.26
17. HackMan
107
00:06.57
18. CipherStar
25
00:06.61
19. SophieK
32
00:07.19
20. pipifax 00:07.34
Today
1. 윤슬
28
00:03.30
2. noxcallis 00:03.42
3. Hori
4
00:04.94
4. turkhuu
20
00:05.11
5. SophieK
32
00:07.19
6. HackMan
107
00:07.89
7. LSQUAREDMATH
27
00:09.72
8. Mihnosu
7
2d 00:02:14.93
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. jaybrainer
236
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
94
00:02.59
10. dkxxznxxx
32
00:02.61
AO5
1. jaybrainer
236
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
94
00:02.61
8. mtanzer
140
00:02.63
9. sauceguardian
97
00:02.67
10. boru
103
00:02.68
AO12
1. jaybrainer
236
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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2025-07-05 21:06:14

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