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.	ypw19	00:33.48
2.	doodlepoodle100	00:44.22
3.	qobi	00:47.33
4.	Dorice	00:49.48
5.	Truth-or-Peace	00:54.42
6.	syucream	00:54.97
7.	GeorgPfleger	00:55.13
8.	Jazka	00:58.85
9.	Lanmo	01:03.16
10.	Nippo	01:12.51
11.	T1anLan	01:16.20
12.	yzl497	01:18.77
13.	jaripetteri	01:34.52
14.	danpuzzler	01:38.73
15.	stharnliu	02:12.93
16.	yosiaki	02:16.03
17.	root3over2	02:16.04
18.	Rorschach	02:16.26
19.	crema	02:23.90
20.	nbapip	02:26.01

This Week
1.	GeorgPfleger	00:55.13
2.	Dorice	01:15.68
3.	doodlepoodle100	01:24.50
4.	jaripetteri	01:34.52
5.	yosiaki	02:16.03
6.	nbapip	02:26.01
7.	llydblr	03:09.78
8.	0mega	04:26.72
9.	stharnliu	05:22.00
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Today
1.	--- empty ---	--:--
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4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
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20.	--- empty ---	--:--

MO3
1.	coolcoolguy65	00:27.60
2.	vowels	00:31.91
3.	bearn	00:35.40
4.	zahhydude1	00:35.59
5.	demian2	00:35.74
6.	numbrr	00:35.88
7.	ypw19	00:37.92
8.	JZE	00:42.14
9.	sfumato	00:42.83
10.	Icay	00:42.93

AO5
1.	coolcoolguy65	00:30.02
2.	vowels	00:31.91
3.	demian2	00:37.73
4.	zahhydude1	00:37.79
5.	numbrr	00:38.80
6.	bearn	00:38.87
7.	JZE	00:42.81
8.	Icay	00:43.17
9.	ypw19	00:43.46
10.	sfumato	00:46.40

AO12
1.	vowels	00:39.61
1.	coolcoolguy65	00:39.61
3.	zahhydude1	00:43.79
4.	bearn	00:44.46
5.	JZE	00:46.73
6.	numbrr	00:48.35
7.	Icay	00:49.29
8.	ypw19	00:52.89
9.	mtanzer	00:54.07
10.	qqwref	00:56.08

Robots / programmatic solvers		info
1.	tlstyer	00:00.007
2.	Charlie Li	00:00.222
3.	Paul Bismuth	00:04.179

* 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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2025-04-25 05:27:40

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