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
14
 00:02.69
3. oli g
24
 00:02.85
4. coolcoolguy65
174
 00:02.95
5. DuStinkst
6
 00:02.98
6. bantz
32
 00:02.99
7. thelegendary08
34
 00:03.03
8. htjones34
41
 00:03.11
8. ClementLauw
6
 00:03.11
10. Arok
115
 00:03.27
11. Skawt
12
 00:03.37
12. Idiot! ¯\_(ツ)_/¯
3
 00:03.39
12. LovetoplayWiiU
7
 00:03.39
14. Andymeow 00:03.40
15. Kukko
171
 00:03.42
16. laozi 00:03.43
17. Chen Jiakai
13
 00:03.48
18. flaccoofshikaku 00:03.49
19. Whoname 00:03.59
20. tequilaboy 00:03.73
This Week
1. CamPuzzle
14
 00:02.69
2. oli g
24
 00:02.85
3. bantz
32
 00:02.99
4. Idiot! ¯\_(ツ)_/¯
3
 00:03.39
4. LovetoplayWiiU
7
 00:03.39
6. Chen Jiakai
13
 00:03.48
7. FxdeSlxyr
5
 00:03.73
8. Green.wolf._
10
 00:03.79
9. finnn 00:03.93
10. pickeli
6
 00:04.06
11. DBWwushen
10
 00:04.28
12. ClementLauw
6
 00:04.43
13. Stacker 00:04.61
14. foggy11
40
 00:04.64
15. Borda 00:04.73
16. cz123 00:04.77
17. AymanAli
4
 00:04.91
18. Richrrad
34
 00:04.99
19. hollow_
6
 00:05.02
20. anuylk 00:05.03
Today
1. bantz
32
 00:02.99
2. CamPuzzle
14
 00:03.03
3. oli g
24
 00:03.19
4. Idiot! ¯\_(ツ)_/¯
3
 00:03.50
5. Chen Jiakai
13
 00:03.70
6. GeorgPfleger
96
 00:05.76
7. FunStuffXD
12
 00:06.38
8. RaymondSB 00:06.42
9. DBWzhang 00:07.96
10. DBW ZJH
4
 00:09.52
11. DBWZhouyoucab
2
 00:09.79
12. james1003 00:10.50
13. DBWtangbao
9
 00:11.71
14. amelia15 00:12.50
15. SWICT
49
 00:13.73
16. DBWwangyongchao
5
 00:14.38
17. meowmeower
6
 00:15.87
18. TheJoker92 00:22.08
19. jewels2001 00:28.39
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
260
 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
260
 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
260
 00:03.00
9. numbrr
315
 00:03.21
10. Vicell
9
 00:03.30
Robots / programmatic solversinfo  
1.tlstyer
144
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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