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. mmyama
79
00:14.79
2. hkjsf
148
00:15.86
3. zenzaburo 00:16.77
4. geyik
200
00:17.37
5. HackMan
121
00:18.37
6. random_person
125
00:20.01
7. niqnna
18
00:20.65
8. pipifax 00:21.41
9. Ebotreson
16
00:22.90
10. Dorice
259
00:23.77
11. Methyl Red
4
00:23.97
12. tonyjo4312
37
00:29.91
13. FunAcroFly
117
00:29.94
14. thall
56
00:31.01
15. ambiorix 00:32.28
16. LordHedgie 00:32.67
17. trLBumm
27
00:35.42
18. Strider500
99
00:35.74
19. Beastinboston
33
00:35.92
20. Nubbb
10
00:36.43
This Week
1. zenzaburo 00:16.77
2. mmyama
79
00:16.81
3. geyik
200
00:17.37
4. niqnna
18
00:20.65
5. Ebotreson
16
00:22.90
6. Methyl Red
4
00:23.97
7. HackMan
121
00:29.78
8. pipifax 00:29.90
9. LordHedgie 00:32.67
10. ambiorix 00:39.06
11. NaPro 00:40.14
12. chrispy
72
01:09.42
13. Kenolo353
116
01:13.74
14. Avish Kaushik
10
01:32.98
15. EG0hun 01:40.70
16. loczeqqq 01:54.75
17.--- empty -----:--
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20.--- empty -----:--
Today
1. HackMan
121
00:39.76
2.--- empty -----:--
3.--- empty -----:--
4.--- empty -----:--
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
306
00:11.24
2. mtanzer
140
00:12.14
3. sfumato
166
00:12.30
4. TashiroMiraki
217
00:12.95
5. Yeti
134
00:13.28
6. gtkrouwel
132
00:13.35
7. Oryn
166
00:13.36
8. vowels
216
00:14.15
9. sauceguardian
103
00:14.22
10. Arok
115
00:14.35
AO5
1. numbrr
306
00:12.27
2. sfumato
166
00:12.81
3. gtkrouwel
132
00:13.10
4. TashiroMiraki
217
00:13.72
5. Oryn
166
00:13.82
6. mtanzer
140
00:14.07
7. Yeti
134
00:14.30
8. qqwref
266
00:14.60
9. sauceguardian
103
00:14.79
10. Nick
217
00:15.32
AO12
1. numbrr
306
00:13.99
2. gtkrouwel
132
00:14.18
3. TashiroMiraki
217
00:14.87
3. sfumato
166
00:14.87
5. Yeti
134
00:15.50
6. mtanzer
140
00:16.17
7. sauceguardian
103
00:16.42
8. Oryn
166
00:16.44
9. qqwref
266
00:17.00
10. Sonar
80
00:17.17
Robots / programmatic solversinfo  
1.tlstyer
137
00:00.007
2.hum@b0t
91
00:00.160
3.cheyette00:00.258

* 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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2026-01-23 09:56:04

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