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.	oli g	00:12.69
2.	qobi	00:13.53
3.	hkjsf	00:14.67
4.	Sampas	00:14.86
5.	GeorgPfleger	00:15.48
6.	siodmy	00:16.06
7.	twisteddome	00:16.38
8.	apilki08	00:16.41
9.	rosebowl731	00:16.88
10.	Dorice	00:17.14
10.	niamhjoy	00:17.14
12.	vyslaud	00:19.41
13.	c1c51	00:19.51
14.	iulik	00:19.65
15.	MushroomsCavern	00:19.90
16.	robertkantor	00:20.20
17.	白切叉燒鵝	00:20.32
18.	ClementLauw	00:20.53
19.	soxfox42	00:20.69
20.	jackhx00	00:20.78

This Week
1.	oli g	00:12.69
2.	hkjsf	00:14.67
3.	Sampas	00:14.86
4.	GeorgPfleger	00:15.48
5.	rosebowl731	00:16.88
6.	vyslaud	00:19.41
7.	c1c51	00:19.51
8.	apilki08	00:19.64
9.	ClementLauw	00:20.53
10.	lanibani8	00:21.04
11.	cylonx	00:26.61
12.	waitwhoislaura	00:26.64
13.	RichWoods	00:27.57
14.	BrunoValads	00:27.82
15.	derpduck	00:27.99
16.	tege20	00:30.47
17.	LaserEmoj1	00:34.28
18.	LetsGoFlyers	00:37.21
19.	5215alphanumeri	00:46.64
20.	olliisttolli	00:48.87

Today
1.	GeorgPfleger	00:18.48
2.	apilki08	00:19.64
3.	RichWoods	00:27.57
4.	5215alphanumeri	00:46.64
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.	zahhydude1	00:08.04
2.	vowels	00:08.48
3.	demian2	00:08.79
4.	Tobi Ente	00:09.61
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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2026-03-15 20:09:44

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