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. flaccoofshikaku 00:02.87
3. Layfort 00:02.93
4. Yuyinraoliang
61
 00:03.23
5. GoldChoco36
172
 00:03.24
5. Idiot! ¯\_(ツ)_/¯
7
 00:03.24
7. email74
40
 00:03.25
7. FxdeSlxyr
10
 00:03.25
9. dirkdiggler 00:03.49
10. willy86ylliw
68
 00:03.64
10. Pitcheroy 00:03.64
12. mimer 00:03.66
12. lrcdd 00:03.66
14. qobi
242
 00:03.81
15. GavinRose
8
 00:03.99
16. Aditzu 00:04.01
17. DBWwushen
15
 00:04.04
18. LeeDi 00:04.15
19. bigjimfridge
66
 00:04.16
20. whutdaelly
5
 00:04.21
This Week
1. flaccoofshikaku 00:02.87
2. dirkdiggler 00:03.49
3. qobi
242
 00:03.81
4. GavinRose
8
 00:03.99
5. willy86ylliw
68
 00:04.21
6. Meerkat
218
 00:04.82
7. GeorgPfleger
101
 00:04.86
8. M S
9
 00:04.90
9. bwall007
27
 00:05.05
10. IanTheG
26
 00:05.35
11. DivineToast
12
 00:05.43
12. oracle3000
23
 00:06.34
13. popopopop123 00:06.69
14. juice 00:06.87
15. Hahllyicssa
49
 00:06.97
16. wallickdeez
28
 00:07.24
17. Dorice
274
 00:07.39
18. takutais25 00:07.58
19. Izzy777
3
 00:08.14
20. spaghetti of jxm
20
 00:09.91
Today
1. zyc5324
5
 00:11.39
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8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
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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
281
 00:02.54
9. Chalk
136
 00:02.63
10. numbrr
325
 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
325
 00:02.61
9. Chalk
136
 00:02.73
10. jaybrainer
281
 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
281
 00:03.00
10. numbrr
325
 00:03.21
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
155
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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