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.	coolcoolguy65	00:26.42
2.	Flexo	00:37.42
3.	doodlepoodle100	00:41.49
4.	GeorgPfleger	00:50.32
5.	Goomy	00:54.77
6.	Zero_ATPUN	01:06.39
7.	yosiaki	01:31.22
8.	Dorice	01:37.03
9.	Sinner	01:48.05
10.	thrasymachus	01:50.00
11.	jj3742	01:50.79
12.	wellwhynot	01:54.28
13.	Bas79	02:03.79
14.	Nienna	02:24.33
15.	angelrose971	02:59.89
16.	Yaoying	03:39.30
17.	Fox-CJ	05:27.51
18.	Eugene Pakhomov	05:59.90
19.	slyguy519	08:14.89
20.	Skemmer	12:07.54

This Week
1.	GeorgPfleger	00:50.72
2.	Zero_ATPUN	01:06.39
3.	Flexo	01:21.21
4.	Dorice	01:37.03
5.	Sinner	01:48.05
6.	Bas79	03:36.35
7.	--- empty ---	--:--
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Today
1.	GeorgPfleger	00:50.72
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
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18.	--- 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	00:38.08
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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2025-08-16 21:44:58

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