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.	Puzzleist	00:23.34
2.	GeorgPfleger	00:35.08
3.	qobi	00:35.21
4.	teacherW66	00:38.46
5.	RaiAT	00:40.79
6.	marbleeeee	00:41.83
7.	Suball	00:45.32
8.	ScorpionMax	00:47.31
9.	thrasymachus	00:47.78
10.	J	00:58.07
11.	Mateo415	01:03.32
12.	EatingBugs	01:10.10
13.	yosiaki	01:22.41
14.	Dorice	01:27.58
15.	daghan	01:44.51
16.	Ingrid59	02:09.40
17.	eichssy	02:15.24
18.	BeateZ	02:20.31
19.	jaripetteri	02:41.48
20.	Bezerkomonkey	02:50.67

This Week
1.	GeorgPfleger	00:36.36
2.	teacherW66	00:38.46
3.	Suball	00:45.32
4.	J	00:58.07
5.	yosiaki	01:22.41
6.	klaii	02:57.75
7.	slowbutbad	03:07.01
8.	CLAVDIVS	03:25.92
9.	Wuni14	04:26.44
10.	Laduska	05:02.04
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Today
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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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2025-08-30 06:51:55

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