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 00:05.63
2. Parade
39
00:06.51
3. Eskimosnake
109
00:06.52
4. tufelix367
58
00:06.56
5. Oryn
153
00:06.66
6. jjconroy506
18
00:07.53
7. Solus
29
00:08.02
8. Albepm
17
00:08.23
9. sway85
19
00:08.65
10. thrasymachus
32
00:08.69
11. pipifax 00:08.92
12. LockedKey
76
00:09.55
13. dtyamada
102
00:09.69
14. Toksku 00:09.81
15. ikun25 00:09.88
16. mmyama
78
00:09.89
17. niqnna
18
00:10.37
18. Chaojie Fu
67
00:10.51
19. Dorice
246
00:12.94
20. HackMan
112
00:13.22
This Week
1. sway85
19
00:09.50
2. Albepm
17
00:09.81
3. pipifax 00:09.89
3. mmyama
78
00:09.89
5. niqnna
18
00:10.37
6. Dorice
246
00:12.94
7. randomflyintaco
117
00:15.85
8. fishysua
147
00:16.14
9. paejunk
54
00:16.67
10. HackMan
112
00:16.98
11. Goochelaar
105
00:18.64
12. CroMa
64
00:19.10
13. potowski 00:22.44
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Today
1. pipifax 00:09.89
2. niqnna
18
00:10.48
3. paejunk
54
00:16.67
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
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11.--- empty -----:--
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MO3
1. numbrr
300
00:04.70
2. vowels
216
00:05.21
3. mtanzer
140
00:05.22
4. Arok
113
00:05.24
5. sfumato
166
00:05.44
6. sauceguardian
99
00:05.81
7. TashiroMiraki
216
00:05.91
8. gtkrouwel
121
00:06.01
8. Yeti
118
00:06.01
10. AnzaJoinDiscord
240
00:06.02
AO5
1. numbrr
300
00:04.78
2. mtanzer
140
00:05.96
3. sfumato
166
00:06.02
4. Arok
113
00:06.06
5. gtkrouwel
121
00:06.15
6. TashiroMiraki
216
00:06.18
7. sauceguardian
99
00:06.20
8. vowels
216
00:06.31
9. AnzaJoinDiscord
240
00:06.33
10. Oryn
153
00:06.55
AO12
1. numbrr
300
00:05.38
2. sfumato
166
00:06.43
3. mtanzer
140
00:06.94
3. Arok
113
00:06.94
5. TashiroMiraki
216
00:07.08
6. sauceguardian
99
00:07.10
7. qqwref
260
00:07.20
8. Douglas Shamlin Jr.
705
00:07.34
9. Sonar
77
00:07.47
10. Oryn
153
00:07.54
Robots / programmatic solversinfo  
1.tlstyer
126
00:00.006
2.cheyette00:00.141
3.hum@b0t
91
00:00.160

* 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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2025-09-02 21:46:05

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