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. CamPuzzle
30
 00:02.73
2. Chen Jiakai
20
 00:02.85
3. Idiot! ¯\_(ツ)_/¯
6
 00:02.96
4. FxdeSlxyr
7
 00:03.09
5. finnn 00:03.14
6. oli g
29
 00:03.20
7. Flounder
122
 00:03.30
8. NunSmacker 00:03.50
8. citcitcitron
4
 00:03.50
10. RaymondSB 00:03.62
11. Hedran
113
 00:03.67
12. AgentTosia
9
 00:03.71
13. sanh
3
 00:03.78
14. bschm1tty
9
 00:03.83
15. Jhinnn 00:03.86
16. huohuo2004
34
 00:03.90
17. Izzy777 00:03.94
18. seanmvrvrvvrth
5
 00:03.96
19. qobi
238
 00:04.00
20. lavaduck
16
 00:04.03
This Week
1. Chen Jiakai
20
 00:02.85
2. Idiot! ¯\_(ツ)_/¯
6
 00:02.96
3. FxdeSlxyr
7
 00:03.14
4. RaymondSB 00:03.62
5. sanh
3
 00:03.78
6. oli g
29
 00:03.81
7. huohuo2004
34
 00:03.90
8. Izzy777 00:03.94
9. lavaduck
16
 00:04.03
9. KimHeeChan
6
 00:04.03
11. ddw06 00:04.31
12. Boldizsar Horthy
19
 00:04.38
13. Corroyeur 00:04.45
14. Ricter 00:04.63
15. cz123 00:04.69
16. AkwRyokuo 00:04.89
17. intentsivecare
23
 00:04.90
18. sansaritto
14
 00:04.95
19. piess 00:05.10
20. Megaaaaa 00:05.16
Today
1. Chen Jiakai
20
 00:02.85
2. FxdeSlxyr
7
 00:03.14
3. RaymondSB 00:03.62
4. intentsivecare
23
 00:04.90
5. kiyyiu 00:05.60
6. SahilP 00:06.38
7. Liounax 00:06.89
8. Mxrixii
16
 00:07.27
9. dbut2
39
 00:07.33
10. Whiispor 00:08.28
11. GeorgPfleger
99
 00:08.31
12. JanJaeger
26
 00:09.36
13. kunkhmerchamp 00:16.67
14. Andreagz 00:17.65
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
267
 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
267
 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
267
 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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