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.	Sloiw	00:11.14
2.	boru	00:12.54
3.	msimon27	00:12.74
4.	Truth-or-Peace	00:17.04
5.	GeorgPfleger	00:18.46
6.	May John	00:19.61
7.	Dchair	00:19.75
8.	Dorice	00:20.59
9.	zebramachine	00:21.07
10.	venipede	00:21.32
10.	NOHJIWAN	00:21.32
12.	RichWoods	00:23.37
13.	aeunchae	00:28.21
14.	MarkSnail	00:28.40
15.	ggzzmm01	00:28.83
16.	viysid	00:32.14
17.	lijiking	00:34.70
18.	CroMa	00:38.22
19.	Eau0mouette	00:41.44
20.	NikoBear	00:43.96

This Week
1.	GeorgPfleger	00:18.46
2.	zebramachine	00:22.43
3.	RichWoods	00:23.53
4.	Eau0mouette	00:41.44
5.	NikoBear	00:43.96
6.	Koakuma	01:45.08
7.	samsamelbz	03:05.00
8.	--- empty ---	--:--
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Today
1.	Eau0mouette	00:41.44
2.	samsamelbz	19:07.28
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
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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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2025-10-29 21:18:41

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