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.	JZE	00:27.25
2.	Goomy	00:51.70
3.	qobi	00:52.26
4.	GeorgPfleger	00:56.04
5.	llmt9	01:04.15
6.	Lanmo	01:04.89
7.	zibigibi	01:23.51
8.	Lucky SAM	01:25.67
9.	Jen Jay	01:26.60
10.	macc hua	01:32.28
11.	Dave Taylor	01:34.01
12.	teacherW66	01:36.92
13.	nbapip	01:48.03
14.	Dorice	01:53.90
15.	yosiaki	02:05.53
16.	jaripetteri	02:23.24
17.	Bas79	02:41.93
18.	sronse	02:53.71
19.	propigisme	03:02.20
20.	belcampo	03:43.05

This Week
1.	GeorgPfleger	00:56.60
2.	qobi	01:06.97
3.	zibigibi	01:23.51
4.	macc hua	01:32.28
5.	sronse	02:53.71
6.	propigisme	03:02.20
7.	0mega	04:16.99
8.	--- empty ---	--:--
9.	--- empty ---	--:--
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20.	--- empty ---	--:--

Today
1.	macc hua	01:39.45
2.	GeorgPfleger	01:41.21
3.	0mega	04:16.99
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
9.	--- empty ---	--:--
10.	--- empty ---	--:--
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
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16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
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	00:38.08
9.	sfumato	00:42.83
10.	Icay	00:42.93

AO5
1.	coolcoolguy65	00:30.02
2.	vowels	00:31.91
3.	JZE	00:37.20
4.	demian2	00:37.73
5.	zahhydude1	00:37.79
6.	numbrr	00:38.80
7.	bearn	00:38.87
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.	JZE	00:44.03
5.	bearn	00:44.46
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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2025-07-02 02:52:28

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