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.	coolcoolguy65	00:30.82
2.	Yuyinraoliang_1	00:54.19
3.	eatatjoes	01:15.27
4.	Autuno	01:19.78
5.	Mattia Paladini	01:19.82
6.	noahtheboa	01:21.16
7.	GeorgPfleger	01:23.86
8.	qobi	01:26.73
9.	Flexo	01:30.94
10.	Noridice	01:35.81
11.	Dorice	01:45.13
12.	Minh Ngọc Hoàng	01:48.28
13.	Sokovik	01:51.45
14.	SniffTO	01:56.22
15.	苏小葵	01:59.56
16.	wjj	02:07.66
17.	Krpyy	02:07.90
18.	Pertyian	02:11.14
19.	jedhen	02:19.38
20.	k03ih01	02:20.83

This Week
1.	coolcoolguy65	00:45.56
2.	Mattia Paladini	01:20.59
3.	GeorgPfleger	01:26.36
4.	Noridice	01:35.81
5.	eatatjoes	01:35.84
6.	Dorice	01:47.59
7.	Sokovik	01:51.45
8.	SniffTO	01:56.22
9.	Krpyy	02:07.90
10.	jedhen	02:19.38
11.	TheRealSavikivi	02:24.85
12.	Mopuzzles	02:28.36
13.	苏小葵	03:03.26
14.	MarkSnail	03:07.86
15.	Fjznbeinfnn	03:45.61
16.	MahjongLyonnais	04:27.27
17.	bambamharibo	04:29.74
18.	cyrus#9023	04:33.89
19.	SLinkTechInc	04:50.51
20.	rob69	05:02.05

Today
1.	Noridice	01:35.81
2.	eatatjoes	01:35.84
3.	GeorgPfleger	02:00.95
4.	Dorice	02:11.56
5.	苏小葵	03:03.26
6.	Sokovik	05:39.81
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.	coolcoolguy65	00:35.53
2.	vowels	00:41.60
3.	bearn	00:45.18
4.	demian2	00:55.33
5.	zahhydude1	00:55.76
6.	qqwref	00:57.96
7.	JZE	00:58.13
8.	DukeAmsterdam	00:59.11
9.	numbrr	00:59.80
10.	anonymous	01:00.82

AO5
1.	coolcoolguy65	00:38.01
2.	vowels	00:44.38
3.	bearn	00:53.87
4.	zahhydude1	00:57.56
5.	qqwref	01:01.66
6.	JZE	01:01.76
7.	anonymous	01:02.17
8.	hoodxxc	01:03.89
9.	DukeAmsterdam	01:04.29
10.	numbrr	01:05.68

AO12
1.	coolcoolguy65	00:47.66
2.	vowels	00:51.97
3.	bearn	01:00.73
4.	zahhydude1	01:10.35
5.	qqwref	01:11.21
6.	anonymous	01:12.93
7.	JZE	01:13.36
8.	DukeAmsterdam	01:15.45
9.	mp3some	01:16.44
10.	tanginess	01:19.46

Robots / programmatic solvers		info
1.	tlstyer	00:00.008
2.	Charlie Li	00:00.224
3.	Paul Bismuth	00:07.037

* 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 23:37:24

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