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	00:39.35
2.	GeorgPfleger	00:57.95
3.	Dorice	01:05.30
4.	apilki08	01:05.40
5.	GoldChoco36	01:05.60
6.	iulik	01:07.89
7.	MushroomsCavern	01:33.79
8.	Liew OwO	01:37.44
9.	SandrDM1	01:42.76
10.	DNicodemus	01:45.39
11.	Jason Nash	01:46.13
12.	nbapip	01:49.56
13.	Lucycc	01:49.75
14.	bma03	01:53.51
15.	samronn	01:57.53
16.	lsummer	02:13.02
17.	shankS	02:14.73
18.	tko720	02:18.46
19.	darah34	02:19.25
20.	chickensalad	02:25.23

This Week
1.	GeorgPfleger	01:03.09
2.	apilki08	01:05.40
3.	iulik	01:07.89
4.	SandrDM1	01:42.76
5.	DNicodemus	01:45.39
6.	Jason Nash	01:46.13
7.	nbapip	01:49.56
8.	Lucycc	01:49.75
9.	bma03	01:53.51
10.	samronn	01:57.53
11.	lsummer	02:13.02
12.	shankS	02:14.73
13.	tko720	02:18.46
14.	darah34	02:19.25
15.	Dorice	02:24.60
16.	theDofDoom	02:31.79
17.	ajisthegoat	02:35.85
18.	SophieK	02:38.78
19.	rinrinrin	02:39.31
20.	Lokomołszyn	02:40.71

Today
1.	GeorgPfleger	01:26.65
2.	shankS	02:14.73
3.	XLPop	05:34.99
4.	aaaahjjjj	07:59.83
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.	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	00:35.90
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.	TheUgly	00:43.38
10.	ypw19	00:43.46

AO12
1.	coolcoolguy65	00:37.11
2.	vowels	00:39.61
3.	zahhydude1	00:43.79
4.	JZE	00:44.03
5.	numbrr	00:44.37
6.	bearn	00:44.46
7.	Icay	00:49.29
8.	ypw19	00:52.89
9.	mtanzer	00:54.07
10.	TheUgly	00:56.03

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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2026-02-23 12:02:40

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