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.	JZE	00:15.29
2.	qobi	00:31.56
3.	Parade	00:31.70
4.	ludanin	00:32.01
5.	llmt9	00:33.86
6.	GeorgPfleger	00:33.93
7.	zibigibi	00:38.02
8.	Flexo	00:38.20
9.	Jen Jay	00:38.96
10.	pouldu	00:45.75
11.	teacherW66	00:47.11
12.	Terriama	00:54.41
13.	Rhododendron	00:55.47
14.	wow shibby	00:56.08
15.	andreichera	00:59.09
16.	leandroneckel	01:04.37
17.	macc hua	01:10.83
18.	Krpyy	01:28.22
19.	Bas79	01:28.90
20.	fatfrog	01:34.09

This Week
1.	GeorgPfleger	00:33.93
2.	Flexo	00:41.65
3.	teacherW66	00:47.99
4.	leandroneckel	01:04.37
5.	JChas	02:10.83
6.	Ariadna	04:21.83
7.	FunAcroFly	07:24.15
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Today
1.	GeorgPfleger	00:34.53
2.	Flexo	00:43.36
3.	leandroneckel	01:04.37
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
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20.	--- empty ---	--:--

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.	Icay	00:25.90
10.	DukeAmsterdam	00:27.03

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.	numbrr	00:25.40
9.	qqwref	00:26.32
10.	Yuyinraoliang_1	00:28.59

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.	JZE	00:29.51
7.	Luke Pickett	00:30.90
8.	Icay	00:31.14
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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2025-07-15 20:35:40

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