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
147
00:15.86
3. LemonSherbet 00:16.84
4. stevethesquid
74
00:18.08
5. HackMan
120
00:18.37
6. random_person
123
00:20.01
7. niqnna
18
00:20.71
8. pipifax 00:21.41
9. Dorice
258
00:23.77
10. Jazka 00:25.10
11. Fjznbeinfnn
8
00:26.21
12. tonyjo4312
37
00:29.91
13. thall
55
00:31.01
14. FunAcroFly
116
00:31.31
15. ambiorix 00:31.98
16. Ebotreson
13
00:33.74
17. trLBumm
27
00:35.42
18. Strider500
98
00:35.74
19. Beastinboston
28
00:35.92
20. Nubbb
2
00:36.43
This Week
1. mmyama
79
00:14.79
2. HackMan
120
00:18.37
3. random_person
123
00:20.01
4. niqnna
18
00:25.25
5. tonyjo4312
37
00:29.91
6. thall
55
00:31.01
7. ambiorix 00:32.28
8. Strider500
98
00:35.74
9. Beastinboston
28
00:35.92
10. qobi
233
00:40.00
11. T0SBI
17
00:49.67
12. paejunk
55
00:55.81
13. EG0hun 00:59.72
14. LordHedgie 01:04.37
15. Rickieman86 01:17.35
16. chrispy
71
01:36.36
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Today
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MO3
1. numbrr
305
00:11.24
2. mtanzer
140
00:12.14
3. sfumato
166
00:12.30
4. TashiroMiraki
217
00:12.95
5. Yeti
133
00:13.28
6. gtkrouwel
131
00:13.35
7. Oryn
165
00:13.36
8. vowels
216
00:14.15
9. sauceguardian
103
00:14.22
10. Arok
115
00:14.35
AO5
1. numbrr
305
00:12.27
2. sfumato
166
00:12.81
3. gtkrouwel
131
00:13.10
4. TashiroMiraki
217
00:13.72
5. Oryn
165
00:13.82
6. mtanzer
140
00:14.07
7. Yeti
133
00:14.30
8. qqwref
266
00:14.60
9. sauceguardian
103
00:14.79
10. Nick
217
00:15.32
AO12
1. numbrr
305
00:13.99
2. gtkrouwel
131
00:14.18
3. TashiroMiraki
217
00:14.87
3. sfumato
166
00:14.87
5. Yeti
133
00:15.50
6. mtanzer
140
00:16.17
7. sauceguardian
103
00:16.42
8. Oryn
165
00:16.44
9. qqwref
266
00:17.00
10. Sonar
79
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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2026-01-16 07:05:53

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