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.	keehaag	00:12.81
2.	MadraMor	00:15.58
3.	GeorgPfleger	00:16.03
4.	Emzed	00:18.58
5.	kroller	00:19.31
6.	HDXX123456789	00:19.68
7.	zhanglin1982	00:19.85
8.	hayei	00:19.96
9.	kinbo71	00:21.11
10.	trLBumm	00:21.58
11.	qobi	00:22.04
12.	Dorice	00:22.77
13.	teacherW66	00:23.23
14.	RichWoods	00:25.13
15.	cheesekurtz	00:26.24
16.	venipede	00:26.57
17.	jaripetteri	00:30.16
18.	ScorpionMax	00:31.70
19.	Green.wolf._	00:31.73
20.	123456789012	00:33.38

This Week
1.	trLBumm	00:21.58
2.	Dorice	00:25.42
3.	cheesekurtz	00:26.24
4.	venipede	00:26.57
5.	RichWoods	00:28.87
6.	jaripetteri	00:30.16
7.	Green.wolf._	00:31.73
8.	acski	00:34.86
9.	EarthBallGD	00:36.22
10.	YONGHU9178	00:36.91
11.	yyyykn	01:28.41
12.	--- empty ---	--:--
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20.	--- empty ---	--:--

Today
1.	--- empty ---	--:--
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
9.	--- empty ---	--:--
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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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2026-01-26 04:58:53

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