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. fyro1 00:02.63
2. CamPuzzle
24
 00:02.69
3. oli g
27
 00:02.85
4. DuStinkst
6
 00:02.98
5. bantz
43
 00:02.99
6. AuroraSrc
37
 00:03.02
6. Idiot! ¯\_(ツ)_/¯
6
 00:03.02
8. Chen Jiakai
20
 00:03.04
9. ClementLauw
8
 00:03.05
10. htjones34
41
 00:03.11
11. schulte 00:03.37
12. LovetoplayWiiU
8
 00:03.39
13. Kukko
174
 00:03.42
14. laozi 00:03.43
15. pilott
10
 00:03.45
16. FxdeSlxyr
5
 00:03.47
17. miggy
162
 00:03.73
17. tequilaboy 00:03.73
19. Green.wolf._
10
 00:03.74
20. not_tanya123
10
 00:03.78
This Week
1. CamPuzzle
24
 00:02.75
2. Chen Jiakai
20
 00:03.06
3. oli g
27
 00:03.28
4. ClementLauw
8
 00:03.31
5. pilott
10
 00:03.45
6. FxdeSlxyr
5
 00:03.50
7. rosebowl731
22
 00:04.02
8. cz123 00:04.10
9. Exxmurf
5
 00:04.30
10. finnn 00:04.42
11. Aeolus 00:04.77
11. notawyverna 00:04.77
13. ryrycrycry
52
 00:04.80
14. elementz 00:04.83
15. bschm1tty
6
 00:04.86
16. NunSmacker 00:04.94
17. GeorgPfleger
97
 00:04.97
18. Candyz
10
 00:05.06
19. austinz
119
 00:05.20
19. RaymondSB 00:05.20
Today
1. CamPuzzle
24
 00:02.86
2. Chen Jiakai
20
 00:03.06
3. LightThrone 00:05.39
4. GeorgPfleger
97
 00:08.29
5. KB1989 00:12.41
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. zahhydude1
212
 00:01.45
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. jaybrainer
263
 00:02.54
8. numbrr
317
 00:02.70
9.anonymous
11
 00:02.73
10. JZE
87
 00:02.79
AO5
1. zahhydude1
212
 00:01.56
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. numbrr
317
 00:02.61
8. jaybrainer
263
 00:02.88
9.anonymous
11
 00:02.89
10. JZE
87
 00:03.01
AO12
1. zahhydude1
212
 00:01.74
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. demian2
61
 00:02.86
6. BingBongBob
108
 00:02.88
7.anonymous
11
 00:02.94
8. jaybrainer
263
 00:03.00
9. numbrr
317
 00:03.21
10. Vicell
9
 00:03.30
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.006
2.Charlie Li
61
00:00.211
3.Paul Bismuth
1
00:01.045

* 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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