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.	GeorgPfleger	00:32.59
2.	SirDiscalot	00:33.86
3.	Lanmo	00:38.59
4.	Jen Jay	00:40.53
5.	Goomy	00:41.93
6.	Dorice	00:51.14
7.	qobi	00:52.37
8.	jaripetteri	01:04.22
9.	Berit	01:06.24
10.	HackMan	01:09.94
11.	Neomonni	01:13.42
12.	Itai795	01:18.79
13.	teacherW66	01:24.12
14.	PericoteRicota	01:25.40
15.	L0S3RPUP	01:26.90
16.	peclo	01:33.58
17.	frzznyh	01:43.39
18.	CHHYHP	01:48.21
19.	daghan	02:07.20
20.	XLPop	02:14.80

This Week
1.	GeorgPfleger	00:32.59
2.	Lanmo	00:38.59
3.	jaripetteri	01:15.54
4.	PericoteRicota	02:14.42
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Today
1.	GeorgPfleger	00:54.10
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MO3
1.	zahhydude1	00:17.66
2.	vowels	00:17.91
3.	demian2	00:19.43
4.	coolcoolguy65	00:19.84
5.	bearn	00:20.58
6.	Luke Pickett	00:22.75
7.	numbrr	00:24.41
8.	Icay	00:25.90
9.	DukeAmsterdam	00:27.03
10.	JZE	00:27.11

AO5
1.	vowels	00:18.50
2.	zahhydude1	00:19.23
3.	demian2	00:21.11
4.	coolcoolguy65	00:21.75
5.	bearn	00:22.87
6.	Luke Pickett	00:24.18
7.	numbrr	00:25.40
8.	qqwref	00:26.32
9.	Yuyinraoliang_1	00:28.59
10.	JZE	00:29.03

AO12
1.	vowels	00:22.07
2.	zahhydude1	00:24.21
3.	coolcoolguy65	00:25.09
4.	bearn	00:26.73
5.	numbrr	00:29.02
6.	Luke Pickett	00:30.90
7.	Icay	00:31.14
8.	JZE	00:31.23
9.	qqwref	00:32.21
10.	sfumato	00:33.58

Robots / programmatic solvers		info
1.	tlstyer	00:00.007
2.	Charlie Li	00:00.213
3.	Paul Bismuth	00:03.112

* 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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2025-06-09 08:48:33

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