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.	Tobi Ente	00:07.43
2.	zebramachine	00:15.09
3.	GeorgPfleger	00:15.52
4.	jj3742	00:18.02
5.	qobi	00:18.58
6.	Rhododendron	00:20.06
7.	RichWoods	00:20.59
8.	Ruan	00:22.49
9.	becka	00:23.73
10.	KETJAK	00:28.71
11.	Fish5417	00:29.14
12.	leandroneckel	00:30.34
13.	Rossi Foggy	00:30.74
14.	苏小葵	00:33.55
15.	SergeiG	00:34.06
16.	angelrose971	00:34.90
17.	FISHPHANTASY	00:35.08
18.	teacherW66	00:36.70
19.	jaripetteri	00:37.87
20.	HackMan	00:39.28

This Week
1.	jj3742	00:18.02
2.	GeorgPfleger	00:18.41
3.	RichWoods	00:25.27
4.	Fish5417	00:29.14
5.	Rossi Foggy	00:30.74
6.	mrgmath	00:43.60
7.	FireTime	01:03.88
8.	Mateo415	01:14.08
9.	CLAVDIVS	02:25.16
10.	--- empty ---	--:--
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	GeorgPfleger	00:23.85
2.	RichWoods	00:25.27
3.	CLAVDIVS	02:25.16
4.	--- empty ---	--:--
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.	bearn	00:09.79
5.	Tobi Ente	00:09.97
6.	coolcoolguy65	00:10.12
7.	JZE	00:10.15
8.	numbrr	00:10.50
9.	Vicellen	00:12.39
10.	haramey	00:12.60

AO5
1.	zahhydude1	00:08.32
2.	vowels	00:09.47
3.	demian2	00:09.82
4.	JZE	00:10.15
5.	Tobi Ente	00:10.47
6.	numbrr	00:10.79
7.	bearn	00:11.41
8.	coolcoolguy65	00:12.11
9.	sfumato	00:12.97
10.	qqwref	00:13.05

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.	numbrr	00:13.35
7.	demian2	00:13.78
8.	JZE	00:14.26
9.	qqwref	00:15.82
10.	sfumato	00:16.09

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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2025-07-30 10:02:32

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