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	00:26.69
2.	numbrr	00:40.45
3.	rudi12	00:50.44
4.	keehaag	00:57.26
5.	DukeAmsterdam	00:57.80
6.	Goomy	01:04.66
7.	daanbe	01:09.91
8.	eatatjoes	01:12.02
9.	GeorgPfleger	01:15.73
10.	qobi	01:16.83
11.	Dorice	01:22.63
12.	elreyneo	01:23.78
13.	niamhjoy	01:25.70
14.	SniffTO	01:26.44
15.	GoldChoco36	01:29.00
16.	Sokovik	01:30.37
17.	ProfKin	01:32.52
18.	noahtheboa	01:35.92
18.	PoaGod	01:35.92
20.	PrankHDevil	01:36.33

This Week
1.	coolcoolguy65	00:30.58
2.	daanbe	01:09.91
3.	eatatjoes	01:18.01
4.	elreyneo	01:23.78
5.	niamhjoy	01:25.70
6.	GoldChoco36	01:29.00
7.	noahtheboa	01:35.92
7.	PoaGod	01:35.92
9.	PrankHDevil	01:36.33
10.	rateπR	01:38.73
11.	Lucycc	01:38.75
12.	micizl	01:40.15
13.	KaneCarter	01:41.09
14.	GeorgPfleger	01:41.29
15.	lordeggyys	01:41.96
16.	ttobias	01:43.05
17.	Litus	01:44.38
18.	tsiim	01:45.12
19.	Amanda Abbott	01:48.33
20.	Clivie	01:56.97

Today
1.	elreyneo	01:23.78
2.	niamhjoy	01:25.70
3.	KaneCarter	01:41.09
4.	GeorgPfleger	01:41.29
5.	tko720	02:25.23
6.	mjpalmerr	02:29.49
7.	Augmentia	02:47.79
8.	blenda	03:17.10
9.	Poeut	03:36.05
10.	wilson16	06:03.28
11.	shankS	07:48.88
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.	tanginess	00:57.73
7.	qqwref	00:57.96
8.	JZE	00:58.13
9.	DukeAmsterdam	00:59.11
10.	keehaag	00:59.21

AO5
1.	coolcoolguy65	00:38.01
2.	vowels	00:44.38
3.	bearn	00:53.87
4.	zahhydude1	00:57.56
5.	keehaag	01:00.96
6.	qqwref	01:01.66
7.	JZE	01:01.76
8.	anonymous	01:02.17
9.	tanginess	01:02.53
10.	hoodxxc	01:03.89

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.	keehaag	01:15.01
9.	DukeAmsterdam	01:15.45
10.	mp3some	01:16.44

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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2026-02-23 10:31:37

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