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. TheLoneWolf 00:43.68
2. TomGuo
146
00:52.95
3. sauceguardian
97
00:55.45
4. Kimseunghyeon 00:59.37
5. AufdemWege
2
01:05.14
6. Emgold 01:06.57
7. COlDAiR
63
01:06.65
8. sue
41
01:11.72
9. PickleCat
38
01:12.66
10. Zemmel
77
01:17.04
11. Goomy
115
01:17.21
12. Fishburger 01:17.46
13. Harry_Canyon
126
01:20.99
14. BernadetteL 01:21.12
15. chiimo 01:30.24
16. Lua
125
01:30.40
17. Dorice
242
01:31.74
18. HackMan
107
01:34.71
19. May John
64
01:40.93
20. jojobond007 01:45.72
This Week
1. TomGuo
146
00:59.09
2. Kimseunghyeon 01:02.37
3. PickleCat
38
01:14.75
4. Fishburger 01:17.46
5. Zemmel
77
01:19.48
6. Harry_Canyon
126
01:26.72
7. Lua
125
01:30.40
8. HackMan
107
01:42.56
9. BernadetteL 01:44.30
10. MGSEN 01:48.71
11. Dorice
242
02:08.11
12. Chaojie Fu
64
02:09.44
13. kanon
49
02:09.80
14. pipifax 02:10.79
15. AnonyMinor
51
02:39.89
16. randomflyintaco
107
02:46.49
17. ambiorix 02:47.33
18. Goochelaar
104
02:48.44
19. VicCatLady
54
03:18.65
20. Rickieman86 03:47.53
Today
1. Harry_Canyon
126
01:26.72
2. Lua
125
01:44.62
3. HackMan
107
02:19.20
4. ambiorix 02:47.33
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
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. numbrr
297
00:36.81
2. TashiroMiraki
215
00:41.81
3. Sonar
77
00:45.80
3. gtkrouwel
118
00:45.80
5. sfumato
166
00:48.33
6. qqwref
259
00:49.53
7. sauceguardian
97
00:53.17
8. mtanzer
140
00:53.20
9. Brian Murphy
107
00:56.51
10. Nick
217
00:56.70
AO5
1. numbrr
297
00:38.90
2. TashiroMiraki
215
00:42.42
3. Sonar
77
00:47.77
4. gtkrouwel
118
00:48.31
5. sfumato
166
00:49.21
6. qqwref
259
00:53.33
7. sauceguardian
97
00:53.95
8. mtanzer
140
00:54.43
9. Brian Murphy
107
00:59.77
10. vowels
216
01:00.99
AO12
1. numbrr
297
00:42.97
2. TashiroMiraki
215
00:45.90
3. gtkrouwel
118
00:50.83
4. Sonar
77
00:53.12
5. sfumato
166
00:54.44
6. qqwref
259
00:57.59
7. mtanzer
140
00:58.75
8. sauceguardian
97
00:59.72
9. Yeti
117
01:05.14
10. vowels
216
01:06.31
Robots / programmatic solversinfo  
1.tlstyer
120
00:00.009
2.hum@b0t
91
00:00.163
3.cheyette00:05.661

* 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 19:29:53

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