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. dimitar243 00:42.31
3. NunSmacker 00:46.76
4. cyrex45
27
 00:48.33
5. Layfort 00:53.31
6. 耒Donatien豕
7
 00:55.63
7. Cezen
11
 01:01.11
8. bantz
62
 01:05.89
9. rosepetals
34
 01:06.34
10. gotFunk 01:08.25
11. oli g
35
 01:08.34
12. LeeDi 01:08.75
13. BurakEBubuGül
13
 01:17.86
14. dirkdiggler 01:21.20
15. WaaA5149 01:22.68
16. lazysloth 01:24.66
17. Liliumauratum
48
 01:24.99
18. noahtheboa 01:25.51
19. kazanok
22
 01:27.36
20. GraceL
39
 01:27.73
This Week
1. coolcoolguy65
181
 00:29.92
2. dimitar243 00:47.05
3. Layfort 00:53.31
4. 耒Donatien豕
7
 00:55.63
5. Cezen
11
 01:01.11
6. cyrex45
27
 01:05.56
7. rosepetals
34
 01:07.11
8. LeeDi 01:08.75
9. gotFunk 01:13.99
10. bantz
62
 01:22.49
11. eatatjoes
19
 01:29.04
12. dirkdiggler 01:32.12
13. Elliot20 01:36.45
14. charwood 01:39.00
15. GeorgPfleger
101
 01:41.59
16. kupadupa
17
 01:48.85
17. wallickdeez
26
 01:49.12
18. Zemmel
158
 02:01.18
19. Rudy4209
41
 02:02.78
20. avishK
21
 02:20.65
Today
1. rosepetals
34
 01:08.51
2. eatatjoes
19
 01:39.65
3. GeorgPfleger
101
 01:43.85
4. avishK
21
 02:52.35
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. coolcoolguy65
181
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. ypw19
94
 00:49.02
5. demian2
61
 00:55.33
6. zahhydude1
218
 00:55.76
7. numbrr
323
 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
94
 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
94
 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
45
00:00.003
2.tlstyer
153
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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