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
19
 00:02.69
3. oli g
25
 00:02.85
4. coolcoolguy65
174
 00:02.95
5. DuStinkst
6
 00:02.98
6. bantz
34
 00:02.99
7. AuroraSrc
37
 00:03.02
7. Idiot! ¯\_(ツ)_/¯
4
 00:03.02
9. thelegendary08
34
 00:03.03
10. Chen Jiakai
16
 00:03.04
11. ClementLauw
7
 00:03.05
12. htjones34
41
 00:03.11
13. Arok
115
 00:03.27
14. schulte 00:03.37
14. Skawt
12
 00:03.37
16. LovetoplayWiiU
7
 00:03.39
17. Kukko
172
 00:03.42
18. laozi 00:03.43
19. flaccoofshikaku 00:03.49
20. Whoname 00:03.59
This Week
1. CamPuzzle
19
 00:02.81
2. bantz
34
 00:02.99
3. AuroraSrc
37
 00:03.02
3. Idiot! ¯\_(ツ)_/¯
4
 00:03.02
5. Chen Jiakai
16
 00:03.04
6. ClementLauw
7
 00:03.05
7. oli g
25
 00:03.19
8. schulte 00:03.37
9. not_tanya123
5
 00:03.78
10. xzz1772 00:03.89
11. Teardown 00:04.00
12. mast3rfak3
9
 00:04.04
13. RaymondSB 00:04.53
14. yzl497
29
 00:04.62
15. Th0mas
10
 00:04.76
16. biggi3
7
 00:04.77
17. FriVGH222
2
 00:04.81
17. _RavenStorm11
13
 00:04.81
19. Ninyan 00:04.96
20. ElPatron
20
 00:04.98
Today
1. Chen Jiakai
16
 00:03.15
2. Idiot! ¯\_(ツ)_/¯
4
 00:03.28
3. oli g
25
 00:03.73
4. not_tanya123
5
 00:03.78
5. xzz1772 00:04.17
6. CamPuzzle
19
 00:04.29
7. biggi3
7
 00:04.77
8. FriVGH222
2
 00:04.94
9. Ninyan 00:04.96
10. elementz 00:05.12
11. RaymondSB 00:05.80
12. MrStark 00:05.85
13. shhhhmbiote 00:06.33
14. dynesonne 00:07.37
15. vick4 00:07.72
16. GeorgPfleger
97
 00:08.10
17. TheStephany 00:09.23
18. KB1989 00:19.22
19. catlen1960 00:22.70
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
262
 00:02.54
8. numbrr
315
 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
315
 00:02.61
8. jaybrainer
262
 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
262
 00:03.00
9. numbrr
315
 00:03.21
10. Vicell
9
 00:03.30
Robots / programmatic solversinfo  
1.tlstyer
145
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.
You need to be logged in to track your averages

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