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.	JZE	00:07.85
3.	Parade	00:14.73
4.	Jen Jay	00:14.87
5.	zebramachine	00:15.09
6.	GeorgPfleger	00:15.52
7.	Ailurus	00:15.73
8.	Flexo	00:16.24
9.	qobi	00:16.72
10.	zibigibi	00:17.96
11.	Lanmo	00:19.60
12.	RichWoods	00:19.76
13.	Xatican	00:20.41
14.	wow shibby	00:21.22
15.	pouldu	00:21.49
16.	Ruan	00:22.49
17.	HDXX123456789	00:22.58
18.	llmt9	00:23.47
19.	sjorford	00:24.64
20.	banach	00:25.74

This Week
1.	Tobi Ente	00:07.43
2.	zebramachine	00:15.09
3.	GeorgPfleger	00:15.52
4.	qobi	00:18.58
5.	RichWoods	00:20.59
6.	Ruan	00:22.49
7.	KETJAK	00:28.71
8.	teacherW66	00:36.70
9.	HackMan	00:39.28
10.	Koakuma	00:43.34
11.	shangdou	00:45.49
12.	sjorford	00:49.66
13.	jaripetteri	00:54.65
14.	sronse	00:55.28
15.	CLAVDIVS	00:57.19
16.	Salmanms	01:20.59
17.	FLF	01:48.12
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	qobi	00:18.58
2.	GeorgPfleger	00:21.96
3.	RichWoods	00:29.56
4.	Koakuma	00:43.34
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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2025-07-06 00:33:54

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