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.	ludanin	00:26.67
2.	PuzzleMaestro	00:27.72
3.	Parade	00:27.73
4.	rosebowl731	00:30.07
5.	oli g	00:31.10
6.	qobi	00:32.95
7.	Dorice	00:34.47
8.	GeorgPfleger	00:37.59
9.	apilki08	00:37.75
10.	vyslaud	00:39.33
11.	Kathirony	00:39.41
12.	Paulll	00:41.45
13.	MushroomsCavern	00:42.79
14.	jessiem	00:43.12
15.	half-releaser	00:43.90
16.	vkayy	00:44.13
17.	iulik	00:44.14
18.	P30VIPER	00:44.18
19.	brtjpk	00:44.43
20.	BingaBonga	00:45.84

This Week
1.	rosebowl731	00:30.07
2.	ludanin	00:30.69
3.	oli g	00:31.10
4.	GeorgPfleger	00:37.59
5.	apilki08	00:38.08
6.	vyslaud	00:39.33
7.	jessiem	00:43.12
8.	brtjpk	00:44.43
9.	BingaBonga	00:45.84
10.	Katja	00:49.17
11.	teacherW66	00:55.40
12.	Sarah Brown-Scott	00:57.40
13.	AccessToGlory	00:59.09
14.	Destroyer CreeperBom...	00:59.19
15.	SandrDM1	01:09.41
16.	LuckyFlow	01:10.51
17.	derpduck	01:14.80
18.	Lua	01:15.47
19.	hendrik69	01:15.53
20.	n81k1i	01:32.09

Today
1.	LuckyFlow	01:10.51
2.	5215alphanumeri	02:06.32
3.	karlutxo	02:54.46
4.	BrunoValads	02:55.50
5.	Geagle	10:29.19
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.	numbrr	00:20.86
7.	JZE	00:21.12
8.	Luke Pickett	00:22.75
9.	ypw19	00:25.10
10.	Icay	00:25.90

AO5
1.	vowels	00:18.50
2.	zahhydude1	00:19.23
3.	demian2	00:21.11
4.	coolcoolguy65	00:21.75
5.	JZE	00:21.89
6.	bearn	00:22.87
7.	numbrr	00:23.97
8.	Luke Pickett	00:24.18
9.	ypw19	00:24.52
10.	qqwref	00:26.32

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.	ypw19	00:29.47
7.	JZE	00:29.51
8.	Luke Pickett	00:30.90
9.	Icay	00:31.14
10.	qqwref	00:32.21

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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2026-03-12 12:07:02

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