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. coolcoolguy65
176
 00:01.92
2. 50R3N6
17
 00:02.13
3. FxdeSlxyr
9
 00:02.34
4. Yuyinraoliang_1
18
 00:02.47
5. Joseph12 00:03.05
6. oli g
31
 00:03.08
7. Chen Jiakai
20
 00:03.12
8. DBWwushen
14
 00:03.24
9. Luvi1a
13
 00:03.27
10. lavaduck
27
 00:03.28
11. Idiot! ¯\_(ツ)_/¯
6
 00:03.47
12. llmt9
99
 00:03.53
13. 구연모
16
 00:03.56
14. steve415723
16
 00:03.70
15. cliper162 00:03.75
16. elementz 00:03.89
17. PiMaster1
3
 00:03.92
18. dave dave
12
 00:04.04
19. Slexia 00:04.08
20. aerooo 00:04.14
This Week
1. Yuyinraoliang_1
18
 00:02.47
2. FxdeSlxyr
9
 00:02.66
3. oli g
31
 00:03.08
4. Chen Jiakai
20
 00:03.12
5. llmt9
99
 00:03.53
6. lanittt
15
 00:04.29
7. qobi
239
 00:04.89
8. GeorgPfleger
99
 00:05.01
9. Nebbo 00:05.33
10. elementz 00:05.45
11. Sports 00:05.74
12. diegosierral
6
 00:05.81
13. pato3042 00:05.93
14. cananattsu 00:06.00
15. ItsBivo 00:06.18
16. PumpkinPants
10
 00:06.28
17. StJavelin
2
 00:06.38
18. HDXX123456789 00:06.45
19. 耒Donatien豕
6
 00:06.73
20. AliceLuminal
12
 00:07.32
Today
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7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
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20.--- empty -----:--
MO3
1. zahhydude1
216
 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
176
 00:02.43
8. jaybrainer
271
 00:02.54
9. numbrr
321
 00:02.70
10.anonymous
11
 00:02.73
AO5
1. zahhydude1
216
 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
176
 00:02.59
8. numbrr
321
 00:02.61
9. jaybrainer
271
 00:02.88
10.anonymous
11
 00:02.89
AO12
1. zahhydude1
216
 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
6. coolcoolguy65
176
 00:02.88
8.anonymous
11
 00:02.94
9. jaybrainer
271
 00:03.00
10. numbrr
321
 00:03.21
Robots / programmatic solversinfo  
1.tlstyer
151
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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