Shikaku


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Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial
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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

New Puzzle
This Month
1. coolcoolguy65
181
 00:21.37
2. ypw19
93
 00:40.51
3. dimitar243 00:41.84
4. NunSmacker 00:50.53
5. rosepetals
34
 00:51.08
6. cyrex45
20
 00:54.09
7. krep12345 00:56.57
8. Elliot20 01:05.70
9. bantz
61
 01:05.89
10. geyik
219
 01:06.54
11. GraceL
39
 01:11.69
12. GeorgPfleger
100
 01:16.69
13. BurakEBubuGül
13
 01:17.86
14. WaaA5149 01:22.68
15. MuxxPedri 01:24.36
16. Liliumauratum
45
 01:24.99
17. Nurr
22
 01:26.65
18. charwood 01:26.95
19. noahtheboa 01:27.04
20. kazanok
18
 01:27.36
This Week
1. coolcoolguy65
181
 00:21.37
2. NunSmacker 00:58.97
3. bantz
61
 01:05.89
4. rosepetals
34
 01:06.34
5. cyrex45
20
 01:15.61
6. BurakEBubuGül
13
 01:17.86
7. WaaA5149 01:22.68
8. Liliumauratum
45
 01:24.99
9. noahtheboa 01:27.04
10. kazanok
18
 01:27.36
11. GraceL
39
 01:27.73
12. 임래정
57
 01:31.05
13. charwood 01:33.02
14. GeorgPfleger
100
 01:35.43
15. cansie 01:41.08
16. dirkdiggler 01:47.55
17. shankS
16
 01:48.50
18. dbut2
43
 01:50.32
19. wallickdeez
25
 01:51.12
20. expers 01:53.62
Today
1. 임래정
57
 01:31.05
2. charwood 01:39.67
3. dirkdiggler 01:47.55
4. GeorgPfleger
100
 02:35.88
5. coleslaw
26
 05:57.07
6. kazanok
18
 23:25:55.85
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. coolcoolguy65
181
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. ypw19
93
 00:49.02
5. demian2
61
 00:55.33
6. zahhydude1
218
 00:55.76
7. numbrr
322
 00:56.76
8. rosepetals
34
 00:57.60
9. tanginess
48
 00:57.73
10. qqwref
266
 00:57.96
AO5
1. coolcoolguy65
181
 00:36.86
2. vowels
216
 00:44.38
3. ypw19
93
 00:51.43
4. bearn
206
 00:53.87
5. zahhydude1
218
 00:57.56
6. rosepetals
34
 00:59.61
7. tanginess
48
 01:00.67
8. keehaag
169
 01:00.96
9. qqwref
266
 01:01.66
10. JZE
88
 01:01.76
AO12
1. coolcoolguy65
181
 00:42.27
2. vowels
216
 00:51.97
3. ypw19
93
 00:55.60
4. bearn
206
 01:00.73
5. dbot
22
 01:09.80
6. zahhydude1
218
 01:10.35
7. qqwref
266
 01:11.21
8.anonymous
62
 01:12.93
9. JZE
88
 01:13.36
10. keehaag
169
 01:15.01
Robots / programmatic solversinfo  
1.dbut2
43
00:00.003
2.tlstyer
151
00:00.008
3.Charlie Li
61
00:00.224

* 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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