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	00:23.71
2.	Yuyinraoliang_1	00:43.12
3.	DukeAmsterdam	00:53.17
4.	tanginess	00:59.99
5.	marbleeeee	01:10.52
6.	Autuno	01:14.51
7.	GeorgPfleger	01:15.20
8.	nysnuib	01:26.45
9.	eatatjoes	01:27.66
10.	thrasymachus	01:33.43
11.	Dorice	01:53.66
12.	La22y	01:58.34
13.	noahtheboa	01:59.67
14.	Flexo	02:02.49
15.	sway85	02:10.02
16.	jedhen	02:13.59
17.	yosiaki	02:15.00
18.	FreezeZ	02:17.52
19.	ScorpionMax	02:22.14
20.	Yaoying	02:28.91

This Week
1.	coolcoolguy65	00:25.41
2.	DukeAmsterdam	00:53.17
3.	tanginess	00:59.99
4.	nysnuib	01:26.45
5.	eatatjoes	01:31.78
6.	GeorgPfleger	01:37.01
7.	Flexo	02:02.49
8.	yosiaki	02:15.00
9.	ZJTZLQLJY	02:37.59
10.	jedhen	02:40.60
11.	yasuyo	02:42.38
12.	MISAKI11037	02:59.20
13.	Suball	02:59.33
14.	Easto	04:19.36
15.	wellwhynot	07:15.75
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	tanginess	00:59.99
2.	eatatjoes	02:17.01
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
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.	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.	Yuyinraoliang	01:19.75

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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2025-08-30 06:51:55

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