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.	Yuyinraoliang_1	00:02.55
2.	Yuyinraoliang	00:03.26
3.	Krpyy	00:03.43
4.	Jen Jay	00:03.69
5.	tanginess	00:03.70
6.	hyul0217	00:03.83
7.	ackbey	00:03.84
8.	ackbey2	00:04.04
9.	HDXX123456789	00:04.27
10.	prinsed	00:04.66
11.	SirDiscalot	00:04.70
12.	kovacsl22	00:04.86
13.	jaripetteri	00:04.90
14.	Dorice	00:04.91
15.	mochuan123	00:05.09
16.	Mihyun	00:05.19
17.	CHHYHP	00:05.20
18.	Richrrad	00:05.23
19.	erfeng111	00:05.33
19.	GeorgPfleger	00:05.33

This Week
1.	ackbey	00:04.45
2.	GeorgPfleger	00:05.52
3.	Chaarlie	00:05.64
4.	zooandroo	00:05.68
5.	becka	00:06.03
6.	kamikazi	00:06.12
7.	venipede	00:06.24
8.	o((>ω< ))o	00:06.52
9.	LiHua	00:06.53
10.	Koakuma	00:06.60
11.	Lanmo	00:06.79
12.	HackMan	00:08.52
13.	jaripetteri	00:09.51
14.	wellwhynot	00:10.15
15.	FunAcroFly	00:14.02
16.	zz h	00:14.32
17.	CLAVDIVS	00:14.52
18.	EXkoala	00:15.12
19.	weiziyue0000	00:20.01
20.	Bas79	00:20.64

Today
1.	GeorgPfleger	00:06.81
2.	HackMan	00:08.52
3.	zz h	00:14.32
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	00:01.47
2.	vowels	00:01.80
3.	CYrZx123	00:02.04
4.	nabi	00:02.07
5.	demian2	00:02.29
5.	BingBongBob	00:02.29
7.	jaybrainer	00:02.72
7.	numbrr	00:02.72
9.	anonymous	00:02.73
10.	JZE	00:02.79

AO5
1.	zahhydude1	00:01.58
2.	vowels	00:01.94
3.	CYrZx123	00:02.16
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	00:01.78
2.	vowels	00:02.02
3.	nabi	00:02.41
4.	CYrZx123	00:02.55
5.	demian2	00:02.86
6.	BingBongBob	00:02.88
7.	anonymous	00:02.94
8.	numbrr	00:03.22
8.	jaybrainer	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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2025-06-09 08:37:45

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