Shikaku

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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This Month
1.	Sloiw	00:03.05
2.	Yuyinraoliang	00:03.15
3.	coolcoolguy65	00:03.66
4.	msimon27	00:03.69
5.	sway85	00:04.00
6.	venipede	00:04.04
7.	marbleeeee	00:04.22
8.	shallwe	00:04.27
8.	Dchair	00:04.27
10.	MISAKI11037	00:04.45
11.	Fjznbeinfnn	00:04.65
12.	zooandroo	00:04.75
13.	NOHJIWAN	00:04.85
14.	fenshen625	00:04.96
15.	dynesonne	00:05.06
15.	imboreed	00:05.06
17.	teacherW66	00:05.14
18.	qobi	00:05.15
19.	viysid	00:05.22
20.	GeorgPfleger	00:05.34

This Week
1.	Sloiw	00:03.05
2.	sway85	00:04.00
3.	Dchair	00:04.27
4.	dynesonne	00:05.06
4.	imboreed	00:05.06
6.	teacherW66	00:05.14
7.	GeorgPfleger	00:05.47
8.	shallwe	00:05.52
9.	NinjaFury68	00:05.71
10.	TheGamerDeyi	00:06.10
11.	JMILLY67	00:06.89
12.	obliviated	00:07.68
13.	MarkSnail	00:08.25
14.	dg4444	00:09.00
15.	olen	00:09.02
16.	riley11	00:09.11
17.	Educated-cat	00:09.72
18.	wellwhynot	00:11.08
19.	Salvete61	00:11.37
20.	Koakuma	00:11.78

Today
1.	Dchair	00:04.27
2.	shallwe	00:05.52
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
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	00:01.45
2.	vowels	00:01.80
3.	CYrZx123	00:01.96
4.	nabi	00:02.07
5.	demian2	00:02.29
5.	BingBongBob	00:02.29
7.	jaybrainer	00:02.54
8.	numbrr	00:02.72
9.	anonymous	00:02.73
10.	JZE	00:02.79

AO5
1.	zahhydude1	00:01.56
2.	vowels	00:01.94
3.	CYrZx123	00:02.11
4.	nabi	00:02.21
5.	BingBongBob	00:02.40
6.	demian2	00:02.44
7.	numbrr	00:02.83
8.	jaybrainer	00:02.88
9.	anonymous	00:02.89
10.	JZE	00:03.01

AO12
1.	zahhydude1	00:01.74
2.	vowels	00:02.02
3.	nabi	00:02.41
4.	CYrZx123	00:02.52
5.	demian2	00:02.86
6.	BingBongBob	00:02.88
7.	anonymous	00:02.94
8.	jaybrainer	00:03.00
9.	numbrr	00:03.22
10.	Vicell	00:03.30

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.211
3.	Paul Bismuth	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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2025-10-22 05:38:32

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