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.	Yuyinraoliang_1	00:36.71
2.	coolcoolguy65	00:37.19
3.	DukeAmsterdam	00:48.29
4.	boru	01:06.47
5.	tanginess	01:11.62
6.	Bluegill16384	01:20.08
7.	Dorice	01:20.91
8.	Frog The Toast	01:22.47
9.	Jen Jay	01:23.58
10.	meep54	01:28.70
11.	GeorgPfleger	01:29.19
12.	zebramachine	01:34.75
13.	eatatjoes	01:40.60
14.	Daveythe	01:40.81
15.	Lucky SAM	01:41.85
15.	heystonegalaxy	01:41.85
17.	KanameRin	01:44.37
18.	2115 michał	01:45.51
19.	SniffTO	01:50.60
20.	yiran	01:50.96

This Week
1.	coolcoolguy65	00:47.36
2.	DukeAmsterdam	00:53.97
3.	GeorgPfleger	01:31.01
4.	Jen Jay	01:38.30
5.	KanameRin	01:44.37
6.	eatatjoes	01:45.02
7.	Pertyian	02:29.97
8.	Bhaskar	02:37.57
9.	Lanmo	02:42.83
10.	jedhen	02:53.89
11.	ietje1	03:10.60
12.	Koakuma	03:21.56
13.	Berit	03:28.14
14.	DavidSXM	04:19.75
15.	Krpyy	04:45.53
16.	wellwhynot	06:58.85
17.	zz h	10:41.15
18.	o((>ω< ))o	24d 20:31:23.64
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	GeorgPfleger	02:21.26
2.	DavidSXM	04:19.75
3.	zz h	10:41.15
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	00:39.36
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.	DukeAmsterdam	01:15.45
8.	mp3some	01:16.44
9.	Yuyinraoliang	01:19.75
10.	numbrr	01:21.16

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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2025-06-09 08:16:07

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