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. AuroraSrc
52
 00:02.86
2. email74
40
 00:02.90
3. Layfort 00:02.93
4. Idiot! ¯\_(ツ)_/¯
7
 00:03.07
5. Yuyinraoliang
61
 00:03.23
6. GoldChoco36
172
 00:03.24
7. FxdeSlxyr
10
 00:03.25
8. HCT635 00:03.54
9. willy86ylliw
67
 00:03.64
9. Pitcheroy 00:03.64
11. mimer 00:03.66
11. lrcdd 00:03.66
13. Aditzu 00:04.01
14. DBWwushen
15
 00:04.04
15. yobert 00:04.05
16. LeeDi 00:04.15
17. bigjimfridge
66
 00:04.16
18. whutdaelly
5
 00:04.21
19. ademovski
23
 00:04.28
20. llmt9
104
 00:04.36
This Week
1. Layfort 00:02.93
2. willy86ylliw
67
 00:03.64
3. FxdeSlxyr
10
 00:03.83
4. DBWwushen
15
 00:04.04
5. dirkdiggler 00:04.45
6. email74
40
 00:04.58
7. qobi
242
 00:04.62
8. Hahllyicssa
48
 00:04.87
9. LeeDi 00:04.92
10. Mieppert 00:04.99
11. GeorgPfleger
101
 00:05.13
12. HotBlondesNearU
1
 00:05.20
13. Devalor 00:05.29
14. Tobias Matthews
2
 00:05.41
15. otaldieguito
3
 00:05.56
16. Charpee
21
 00:05.94
17. airmo 00:06.24
18. Swagrymple 00:06.25
19. wallickdeez
26
 00:06.35
20. kevinguyen 00:06.38
Today
1. willy86ylliw
67
 00:05.20
2. GeorgPfleger
101
 00:05.32
3. Tobias Matthews
2
 00:05.41
4. wallickdeez
26
 00:06.35
5. Puppetear 00:08.08
6. plumgun88
4
 00:09.18
7. HuTaosTopGal
1
 00:33.61
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. zahhydude1
218
 00:01.42
2. vowels
216
 00:01.80
3. CYrZx123
55
 00:01.95
4. nabi
92
 00:02.07
5. demian2
61
 00:02.29
5. BingBongBob
108
 00:02.29
7. coolcoolguy65
181
 00:02.36
8. jaybrainer
279
 00:02.54
9. Chalk
134
 00:02.63
10. numbrr
324
 00:02.70
AO5
1. zahhydude1
218
 00:01.43
2. vowels
216
 00:01.94
3. CYrZx123
55
 00:02.05
4. nabi
92
 00:02.21
5. BingBongBob
108
 00:02.40
6. demian2
61
 00:02.44
7. coolcoolguy65
181
 00:02.55
8. numbrr
324
 00:02.61
9. Chalk
134
 00:02.73
10. jaybrainer
279
 00:02.88
AO12
1. zahhydude1
218
 00:01.67
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. coolcoolguy65
181
 00:02.79
6. demian2
61
 00:02.86
7. BingBongBob
108
 00:02.88
8.anonymous
11
 00:02.94
9. jaybrainer
279
 00:03.00
10. numbrr
324
 00:03.21
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
154
00:00.006
3.Charlie Li
61
00:00.211

* 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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