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	00:16.94
2.	Sloiw	00:29.79
3.	teacherW66	00:30.57
4.	zebramachine	00:31.67
5.	qobi	00:32.90
6.	GeorgPfleger	00:35.99
7.	msimon27	00:41.87
8.	OrxhidCrimes	00:42.51
9.	NOHJIWAN	00:46.99
10.	MarkSnail	00:47.70
11.	venipede	00:50.01
12.	Dorice	00:53.29
13.	Educated-cat	00:54.03
14.	May John	00:57.32
15.	whitevoidsky	00:58.68
16.	Oryn	01:01.37
17.	Dchair	01:03.16
18.	zooandroo	01:04.19
19.	Koakuma	01:12.29
20.	fenshen625	01:18.56

This Week
1.	Sloiw	00:29.79
2.	teacherW66	00:33.40
3.	GeorgPfleger	00:40.42
4.	OrxhidCrimes	00:42.51
5.	Dorice	00:53.29
6.	Dchair	01:03.16
7.	MarkSnail	01:19.46
8.	aeunchae	01:22.27
9.	Picccccci	02:03.22
10.	〆鯖	08:51.12
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	teacherW66	00:40.47
2.	Sloiw	00:44.73
3.	Dchair	01:03.16
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.	JZE	00:21.12
7.	Luke Pickett	00:22.75
8.	numbrr	00:24.41
9.	Icay	00:25.90
10.	DukeAmsterdam	00:27.03

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.	Luke Pickett	00:24.18
8.	numbrr	00:25.40
9.	qqwref	00:26.32
10.	Yuyinraoliang_1	00:28.59

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.	JZE	00:29.51
7.	Luke Pickett	00:30.90
8.	Icay	00:31.14
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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2025-10-22 18:22:41

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