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.	Eskimosnake	00:29.91
2.	qobi	00:30.27
3.	GeorgPfleger	00:31.89
4.	Kyra05	00:37.65
5.	lew	00:39.13
6.	syucream	00:40.60
7.	Dorice	00:40.96
8.	monkeyman88	00:41.29
9.	HDXX123456789	00:51.65
10.	siaalove	00:52.09
11.	angelina4fina	00:52.44
12.	egosi	00:54.80
13.	zhanglin1982	00:59.13
14.	Rorschach	01:11.39
15.	imbored	01:12.63
16.	预防老年痴呆	01:17.09
17.	Terriama	01:20.95
18.	DR-80	01:29.95
19.	choi123	01:30.56
20.	peclo	01:35.50

This Week
1.	GeorgPfleger	00:36.51
2.	syucream	00:40.60
3.	HDXX123456789	00:51.65
4.	egosi	00:54.80
5.	Dorice	00:57.63
6.	siaalove	01:02.97
7.	Rorschach	01:11.39
8.	预防老年痴呆	01:17.09
9.	jdubs	01:43.61
10.	廖得然	01:50.53
11.	zardmyers	01:53.51
12.	黄燐	04:11.70
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	GeorgPfleger	00:36.51
2.	Dorice	05:58.00
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.	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.	Luke Pickett	00:22.75
7.	numbrr	00:24.41
8.	Icay	00:25.90
9.	DukeAmsterdam	00:27.03
10.	JZE	00:27.11

AO5
1.	vowels	00:18.50
2.	zahhydude1	00:19.23
3.	demian2	00:21.11
4.	coolcoolguy65	00:21.75
5.	bearn	00:22.87
6.	Luke Pickett	00:24.18
7.	numbrr	00:25.40
8.	qqwref	00:26.32
9.	Valkyrie_	00:28.59
10.	JZE	00:29.03

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.	Luke Pickett	00:30.90
7.	Icay	00:31.14
8.	JZE	00:31.23
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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2025-03-28 16:40:31

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