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.	coolcoolguy65	00:33.88
2.	camy9210	01:02.21
3.	GeorgPfleger	01:03.62
4.	Dorice	01:07.27
5.	Lanmo	01:09.70
6.	Beastinboston	01:11.78
7.	Lisa Gordon	01:15.11
8.	venipede	01:17.17
9.	mofumofumofu	01:27.37
10.	Ruan	01:54.31
11.	CauDravan	01:55.23
12.	TheRealSavikivi	01:55.34
13.	Jt4096	02:01.47
14.	cyrus#9023	02:07.61
15.	nbapip	02:12.75
16.	teacherW66	02:16.73
17.	h kim	02:22.37
18.	Fjznbeinfnn	02:38.19
19.	bambamharibo	02:42.36
20.	saitama	02:48.83

This Week
1.	camy9210	01:02.21
2.	GeorgPfleger	01:08.77
3.	Lisa Gordon	01:15.11
4.	Dorice	01:31.98
5.	Lanmo	01:43.62
6.	Ruan	01:54.31
7.	Fjznbeinfnn	02:38.19
8.	--- empty ---	--:--
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20.	--- empty ---	--:--

Today
1.	Lisa Gordon	01:46.36
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
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16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

MO3
1.	coolcoolguy65	00:27.60
2.	vowels	00:31.91
3.	bearn	00:35.40
4.	zahhydude1	00:35.59
5.	demian2	00:35.74
6.	numbrr	00:35.88
7.	ypw19	00:35.90
8.	JZE	00:38.08
9.	sfumato	00:42.83
10.	Icay	00:42.93

AO5
1.	coolcoolguy65	00:30.02
2.	vowels	00:31.91
3.	JZE	00:37.20
4.	demian2	00:37.73
5.	zahhydude1	00:37.79
6.	numbrr	00:38.80
7.	bearn	00:38.87
8.	Icay	00:43.17
9.	TheUgly	00:43.38
10.	ypw19	00:43.46

AO12
1.	coolcoolguy65	00:37.11
2.	vowels	00:39.61
3.	zahhydude1	00:43.79
4.	JZE	00:44.03
5.	bearn	00:44.46
6.	numbrr	00:48.35
7.	Icay	00:49.29
8.	ypw19	00:52.89
9.	mtanzer	00:54.07
10.	TheUgly	00:56.03

Robots / programmatic solvers		info
1.	tlstyer	00:00.007
2.	Charlie Li	00:00.222
3.	Paul Bismuth	00:04.179

* 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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2025-12-25 03:56:21

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