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.	qobi	00:13.53
2.	oli g	00:15.75
3.	siodmy	00:16.06
4.	twisteddome	00:16.38
5.	apilki08	00:16.41
6.	GeorgPfleger	00:16.71
7.	Dorice	00:17.14
7.	niamhjoy	00:17.14
9.	iulik	00:19.65
10.	MushroomsCavern	00:19.90
11.	robertkantor	00:20.20
12.	白切叉燒鵝	00:20.32
13.	soxfox42	00:20.69
14.	jackhx00	00:20.78
15.	rosebowl731	00:20.90
16.	AccessToGlory	00:21.00
17.	Paweł Noras	00:21.60
18.	SophieK	00:21.64
19.	Kmeon	00:21.69
20.	PuzzleMaestro	00:22.04

This Week
1.	oli g	00:15.75
2.	siodmy	00:16.06
3.	apilki08	00:16.41
4.	GeorgPfleger	00:20.20
5.	soxfox42	00:20.69
6.	jackhx00	00:20.78
7.	qobi	00:21.44
8.	SophieK	00:21.64
9.	AccessToGlory	00:21.70
10.	nyahr	00:22.44
11.	モグモグ	00:22.63
12.	RichWoods	00:23.10
13.	foverino	00:23.99
14.	robertkantor	00:24.26
15.	P30VIPER	00:24.27
16.	lanibani8	00:25.15
17.	sadenacel	00:27.53
18.	LaserEmoj1	00:28.67
19.	Beigen	00:29.62
20.	LetsGoFlyers	00:31.49

Today
1.	oli g	00:19.38
2.	CALVOMAN	00:38.20
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	00:08.04
2.	vowels	00:08.48
3.	demian2	00:08.79
4.	Tobi Ente	00:09.74
5.	bearn	00:09.79
6.	coolcoolguy65	00:10.12
7.	JZE	00:10.15
8.	numbrr	00:10.50
9.	ypw19	00:10.73
10.	entenstein	00:12.32

AO5
1.	zahhydude1	00:08.32
2.	vowels	00:09.47
3.	demian2	00:09.82
4.	JZE	00:10.15
5.	Tobi Ente	00:10.32
6.	numbrr	00:10.79
7.	bearn	00:11.41
8.	coolcoolguy65	00:12.11
9.	ypw19	00:12.20
10.	entenstein	00:12.53

AO12
1.	zahhydude1	00:10.30
2.	vowels	00:10.59
3.	Tobi Ente	00:12.08
4.	bearn	00:13.05
5.	coolcoolguy65	00:13.11
6.	entenstein	00:13.34
7.	numbrr	00:13.35
8.	demian2	00:13.78
9.	ypw19	00:14.04
10.	JZE	00:14.26

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.208
3.	Paul Bismuth	00:02.423

* 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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2026-03-06 06:16:01

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