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.	keehaag	00:20.41
2.	ludanin	00:25.55
3.	boru	00:27.89
4.	Parade	00:30.61
5.	GeorgPfleger	00:31.12
6.	qobi	00:33.64
7.	teacherW66	00:33.90
8.	MadraMor	00:35.15
9.	Dorice	00:41.28
10.	ScorpionMax	00:44.95
11.	zhanglin1982	00:44.98
12.	hayei	00:47.33
13.	Emzed	00:51.76
14.	kroller	00:57.63
15.	Lua	00:59.79
16.	venipede	01:00.31
17.	cinro996	01:05.30
18.	cheesekurtz	01:10.29
19.	rob69	01:11.25
20.	GRudiD	01:31.30

This Week
1.	boru	00:27.89
2.	Dorice	00:41.28
3.	Lua	00:59.79
4.	venipede	01:00.31
5.	cheesekurtz	01:10.29
6.	acski	05:53.86
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Today
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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.	JZE	00:21.12
7.	Luke Pickett	00:22.75
8.	numbrr	00:24.41
9.	ypw19	00:25.10
10.	Icay	00:25.90

AO5
1.	vowels	00:18.50
2.	zahhydude1	00:19.23
3.	demian2	00:21.11
4.	coolcoolguy65	00:21.75
5.	JZE	00:21.89
6.	bearn	00:22.87
7.	Luke Pickett	00:24.18
8.	ypw19	00:24.52
9.	numbrr	00:25.40
10.	qqwref	00:26.32

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.	ypw19	00:29.47
7.	JZE	00:29.51
8.	Luke Pickett	00:30.90
9.	Icay	00:31.14
10.	qqwref	00:32.21

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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2026-01-26 04:43:21

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