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. Arok
108
00:05.17
2. Kimseunghyeon 00:05.85
3. mmyama
74
00:06.39
4. Goomy
100
00:06.43
5. 2021zhao07
15
00:07.49
6. Truth-or-Peace
121
00:08.24
7. tufelix367
45
00:08.56
8. asatzhh
15
00:09.91
9. grimmgirlfandom
145
00:10.44
10. MrMythicorn
104
00:10.50
11. Dorice
238
00:11.01
12. HackMan
97
00:11.04
13. pipifax 00:11.39
14. Inf3rnal3s
22
00:11.42
15. k03ih01
34
00:11.65
16. qobi
220
00:12.07
17. hbbimichel1
6
00:13.73
18. lauraterry1 00:13.77
19. izrabelle
31
00:14.52
20. Pissumurone 00:14.76
This Week
1. Kimseunghyeon 00:05.93
2. asatzhh
15
00:09.91
3. mmyama
74
00:10.29
4. pipifax 00:11.39
5. Fabiogaudo
19
00:16.91
6. real8ggt
40
00:20.31
7. Anakin Skywalker
25
00:22.70
8. Dicko-san
106
00:23.01
9. Koakuma
46
00:23.46
10. ambiorix 00:34.89
11. Athul S
12
00:42.08
12. yosiaki
83
00:46.80
13. 九曜
53
01:17.45
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Today
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MO3
1. numbrr
288
00:04.70
2. vowels
214
00:05.21
3. mtanzer
140
00:05.22
4. Arok
108
00:05.24
5. sfumato
166
00:05.44
6. sauceguardian
95
00:05.81
7. TashiroMiraki
214
00:05.91
8. gtkrouwel
113
00:06.01
8. Yeti
109
00:06.01
10. jaybrainer
225
00:06.02
AO5
1. numbrr
288
00:04.78
2. mtanzer
140
00:05.96
3. sfumato
166
00:06.02
4. Arok
108
00:06.06
5. gtkrouwel
113
00:06.15
6. TashiroMiraki
214
00:06.18
7. sauceguardian
95
00:06.20
8. vowels
214
00:06.31
9. jaybrainer
225
00:06.33
10. Oryn
148
00:06.55
AO12
1. numbrr
288
00:05.38
2. sfumato
166
00:06.43
3. mtanzer
140
00:06.94
3. Arok
108
00:06.94
5. TashiroMiraki
214
00:07.08
6. sauceguardian
95
00:07.10
7. qqwref
259
00:07.20
8. Douglas Shamlin Jr.
683
00:07.34
9. Sonar
77
00:07.47
10. Oryn
148
00:07.54
Robots / programmatic solversinfo  
1.tlstyer
108
00:00.006
2.hum@b0t
91
00:00.160
3.penguain
57
00:00.915

* 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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2025-04-21 18:33:57

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