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. miggy
172
 00:02.14
2. flaccoofshikaku 00:02.55
3. oli g
36
 00:02.82
4. FxdeSlxyr
10
 00:02.90
5. zuhnaie
22
 00:03.09
6. willy86ylliw
71
 00:03.13
7. Idiot! ¯\_(ツ)_/¯
7
 00:03.33
8. MrMuhuny 00:03.58
9. coolcoolguy65
183
 00:03.82
10. cliper162 00:03.87
11. alazyslump
17
 00:04.02
12. Oryn
198
 00:04.04
12. magarner
73
 00:04.04
14. Layfort 00:04.11
15. Slexia 00:04.12
16. blumlo
3
 00:04.30
17. dirkdiggler 00:04.40
18. waifu
7
 00:04.43
19. Cladz365 00:04.44
20. qobi
243
 00:04.50
This Week
1. Idiot! ¯\_(ツ)_/¯
7
 00:03.33
2. FxdeSlxyr
10
 00:03.73
3. willy86ylliw
71
 00:03.93
4. mts55
50
 00:04.69
5. Jackh 00:04.72
6. GeorgPfleger
102
 00:04.96
7. vvljvv 00:05.01
8. Hahllyicssa
54
 00:05.25
9. lilyyym 00:05.69
10. Luuvely
2
 00:06.01
11. KAKKA 00:06.19
12. wallickdeez
32
 00:06.21
13. Izzy777
3
 00:06.40
14. Sephagus
10
 00:06.42
15. Szysiu123
20
 00:06.81
16. PumpkinPants
14
 00:06.91
17. magarner
73
 00:07.11
18. kay
3
 00:07.52
19. DBWzhoulvchen
4
 00:07.64
20. ArcaneNode
37
 00:07.88
Today
1. GeorgPfleger
102
 00:05.76
2. chamelian 00:08.72
3. a123a15678 00:10.37
4. KB1989 00:11.12
5. gernotg
24
 00:12.37
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
221
 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. Anza2700
75
 00:02.34
8. coolcoolguy65
183
 00:02.36
9. numbrr
328
 00:02.43
10. FiloNiloPilo
58
 00:02.49
AO5
1. zahhydude1
221
 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
328
 00:02.53
8. coolcoolguy65
183
 00:02.55
9. Anza2700
75
 00:02.62
10. FiloNiloPilo
58
 00:02.72
AO12
1. zahhydude1
221
 00:01.67
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. coolcoolguy65
183
 00:02.79
6. numbrr
328
 00:02.85
7. demian2
61
 00:02.86
8. BingBongBob
108
 00:02.88
9. FiloNiloPilo
58
 00:02.91
10. tongjordon@gmail.com
11
 00:02.94
Robots / programmatic solversinfo  
1.dbut2
52
00:00.003
2.tlstyer
157
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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