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.	Yuyinraoliang_1	00:02.80
2.	Dorice	00:03.58
3.	marbleeeee	00:04.07
4.	Tmoney69	00:04.08
5.	jeszon	00:04.09
6.	jj3742	00:04.23
7.	Parade	00:04.41
8.	SirDiscalot	00:04.47
9.	Puzzleist	00:04.51
10.	sway85	00:04.53
11.	thrasymachus	00:04.59
12.	Richrrad	00:04.72
13.	Preston10	00:04.84
14.	qobi	00:04.97
15.	Yuyinraoliang	00:04.98
16.	NaNO3	00:05.01
17.	Emberana	00:05.04
17.	qianyek	00:05.04
19.	Einsteinus	00:05.07
19.	GeorgPfleger	00:05.07

This Week
1.	SirDiscalot	00:04.47
2.	NaNO3	00:05.01
3.	qianyek	00:05.04
4.	jeszon	00:05.06
5.	Einsteinus	00:05.07
5.	GeorgPfleger	00:05.07
7.	yasuyo	00:05.74
8.	MISAKI11037	00:06.11
9.	kovacsl22	00:07.04
10.	oursinblanc	00:08.52
11.	DaAmateurSolver	00:08.85
12.	Jaka	00:08.92
13.	eichssy	00:09.27
14.	HackMan	00:09.57
15.	ali2tehrani	00:09.88
16.	Bezerkomonkey	00:10.20
17.	takerusan	00:11.40
18.	CroMa	00:11.75
19.	FunAcroFly	00:12.66
20.	wellwhynot	00:12.81

Today
1.	GeorgPfleger	00:05.07
2.	yasuyo	00:05.74
3.	Bezerkomonkey	00:10.20
4.	HackMan	00:10.52
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	00:01.45
2.	vowels	00:01.80
3.	CYrZx123	00:02.04
4.	nabi	00:02.07
5.	demian2	00:02.29
5.	BingBongBob	00:02.29
7.	jaybrainer	00:02.72
7.	numbrr	00:02.72
9.	anonymous	00:02.73
10.	JZE	00:02.79

AO5
1.	zahhydude1	00:01.56
2.	vowels	00:01.94
3.	CYrZx123	00:02.16
4.	nabi	00:02.21
5.	BingBongBob	00:02.40
6.	demian2	00:02.44
7.	numbrr	00:02.83
8.	jaybrainer	00:02.88
9.	anonymous	00:02.89
10.	JZE	00:03.01

AO12
1.	zahhydude1	00:01.74
2.	vowels	00:02.02
3.	nabi	00:02.41
4.	CYrZx123	00:02.52
5.	demian2	00:02.86
6.	BingBongBob	00:02.88
7.	anonymous	00:02.94
8.	numbrr	00:03.22
8.	jaybrainer	00:03.22
10.	Vicell	00:03.30

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.211
3.	Paul Bismuth	00:01.045

* 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 22:07:36

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