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. Chen Jiakai
20
 00:02.85
2. 50R3N6
15
 00:02.87
3. FxdeSlxyr
8
 00:02.88
4. Idiot! ¯\_(ツ)_/¯
6
 00:02.96
5. oli g
30
 00:03.24
6. citcitcitron
4
 00:03.50
7. 구연모
15
 00:03.56
8. RaymondSB 00:03.62
9. CamPuzzle
30
 00:03.78
9. sanh
3
 00:03.78
11. steve415723
12
 00:03.81
12. Joseph12 00:03.85
13. huohuo2004
35
 00:03.90
14. Izzy777 00:03.94
15. seanmvrvrvvrth
5
 00:03.96
16. llmt9
98
 00:04.02
17. lavaduck
23
 00:04.03
17. KimHeeChan
7
 00:04.03
19. Slexia 00:04.08
20. Ricter 00:04.13
This Week
1. FxdeSlxyr
8
 00:02.88
1. 50R3N6
15
 00:02.88
3. Chen Jiakai
20
 00:03.19
4. Idiot! ¯\_(ツ)_/¯
6
 00:03.83
5. Joseph12 00:03.85
6. llmt9
98
 00:04.02
7. Slexia 00:04.08
8. BigNode 00:04.31
9. ethan1021
15
 00:04.45
10. pulsar890
7
 00:04.49
11. epinu
117
 00:04.52
12. peytonl07
5
 00:04.55
13. elementz 00:04.56
14. Ricter 00:04.87
15. perpendiculars 00:04.92
16. JohannKai
39
 00:05.32
17. wayniie
5
 00:05.33
18. HintLOL
4
 00:05.43
19. thelazycat2011 00:05.53
20. teacherW66 00:05.60
Today
1. elementz 00:04.73
2. llmt9
98
 00:05.96
3. qobi
238
 00:06.50
4. Ether
6
 00:07.00
5. Dorice
270
 00:07.14
6. ssawooga 00:07.77
7. eRogue
43
 00:08.33
8. imKiraL
4
 00:14.26
9. Luzzy777 00:14.80
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
215
 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. jaybrainer
269
 00:02.54
8. numbrr
321
 00:02.70
9.anonymous
11
 00:02.73
10. JZE
88
 00:02.79
AO5
1. zahhydude1
215
 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. numbrr
321
 00:02.61
8. jaybrainer
269
 00:02.88
9.anonymous
11
 00:02.89
10. JZE
88
 00:03.01
AO12
1. zahhydude1
215
 00:01.67
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
269
 00:03.00
9. numbrr
321
 00:03.21
10. Vicell
9
 00:03.30
Robots / programmatic solversinfo  
1.tlstyer
150
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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