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.	Tobi Ente	00:07.43
2.	tanginess	00:11.53
3.	Zetres	00:14.19
4.	DJdeMaster	00:15.60
5.	Noridice	00:16.04
6.	kroller	00:17.30
7.	qobi	00:17.40
8.	Dorice	00:18.28
9.	GeorgPfleger	00:18.44
10.	alphakori	00:19.91
11.	Jazka	00:20.87
12.	venipede	00:21.04
13.	Nagisae	00:21.24
14.	danpuzzler	00:21.71
15.	RichWoods	00:22.49
16.	banach	00:23.61
17.	Solus	00:24.48
18.	trLBumm	00:25.53
19.	thall	00:26.41
20.	foggy11	00:26.76

This Week
1.	Tobi Ente	00:07.43
2.	Zetres	00:14.19
3.	Noridice	00:16.04
4.	kroller	00:17.30
5.	Dorice	00:19.33
6.	GeorgPfleger	00:23.15
7.	trLBumm	00:25.53
8.	rob69	00:28.59
9.	RichWoods	00:34.39
10.	HackMan	00:35.40
11.	TheRealSavikivi	00:35.99
12.	bambamharibo	00:51.83
13.	The16FigureLimit	01:14.58
14.	growlxy	01:23.87
15.	ProfessionalPuzzler	01:50.47
16.	North170	02:53.99
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	Noridice	00:16.04
2.	GeorgPfleger	00:24.94
3.	rob69	00:28.59
4.	RichWoods	00:34.88
5.	North170	02:53.99
6.	--- empty ---	--:--
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	00:08.04
2.	vowels	00:08.48
3.	demian2	00:08.79
4.	bearn	00:09.79
5.	Tobi Ente	00:09.97
6.	coolcoolguy65	00:10.12
7.	JZE	00:10.15
8.	numbrr	00:10.50
9.	entenstein	00:12.32
10.	Vicellen	00:12.39

AO5
1.	zahhydude1	00:08.32
2.	vowels	00:09.47
3.	demian2	00:09.82
4.	JZE	00:10.15
5.	Tobi Ente	00:10.47
6.	numbrr	00:10.79
7.	bearn	00:11.41
8.	coolcoolguy65	00:12.11
9.	entenstein	00:12.53
10.	sfumato	00:12.97

AO12
1.	zahhydude1	00:10.30
2.	vowels	00:10.59
3.	Tobi Ente	00:12.08
4.	bearn	00:13.05
5.	coolcoolguy65	00:13.11
6.	entenstein	00:13.34
7.	numbrr	00:13.35
8.	demian2	00:13.78
9.	JZE	00:14.26
10.	qqwref	00:15.82

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.208
3.	Paul Bismuth	00:02.423

* 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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2025-12-08 23:39:54

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