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	00:02.55
2.	D A	00:03.32
3.	Eduard	00:03.63
4.	SirDiscalot	00:03.72
5.	Yeti	00:03.78
6.	hyul0217	00:03.83
7.	Jen Jay	00:03.90
8.	GeorgPfleger	00:04.11
9.	2115 michał	00:04.24
10.	HDXX123456789	00:04.42
11.	venipede	00:04.45
12.	johannn	00:04.55
13.	cugntear	00:04.64
14.	prinsed	00:04.71
15.	grimmgirlfandom	00:04.80
16.	Dorice	00:04.90
17.	mochuan123	00:05.09
18.	dynesonne	00:05.11
19.	doodlepoodle100	00:05.12
20.	ScorpionMax	00:05.13

This Week
1.	Yuyinraoliang_1	00:02.55
2.	hyul0217	00:03.83
3.	Jen Jay	00:03.90
4.	SirDiscalot	00:04.70
5.	prinsed	00:04.71
6.	mochuan123	00:05.09
6.	HDXX123456789	00:05.09
8.	Mihyun	00:05.19
9.	GeorgPfleger	00:05.33
10.	dynesonne	00:05.70
11.	Chaarlie	00:05.73
12.	kamikazi	00:06.45
13.	Dorice	00:06.48
14.	revisewithleo	00:07.20
15.	toryx68	00:07.37
16.	batuhanarda	00:07.57
17.	august2010980	00:08.24
18.	gentleben	00:08.66
19.	frzznyh	00:09.67
20.	HackMan	00:10.14

Today
1.	hyul0217	00:03.83
2.	Jen Jay	00:04.19
3.	Mihyun	00:05.19
4.	Chaarlie	00:05.73
5.	GeorgPfleger	00:06.20
6.	dynesonne	00:06.63
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	00:01.48
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	00:01.59
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	00:01.78
2.	vowels	00:02.02
3.	nabi	00:02.41
4.	CYrZx123	00:02.55
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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2025-05-16 16:59:28

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