Shikaku


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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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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

New Puzzle
This Month
1. coolcoolguy65
177
 00:01.92
2. 50R3N6
17
 00:02.13
3. FxdeSlxyr
10
 00:02.34
4. Yuyinraoliang_1
18
 00:02.47
5. oli g
33
 00:03.08
6. llmt9
100
 00:03.09
7. Chen Jiakai
20
 00:03.12
8. dbot
22
 00:03.17
9. DBWwushen
14
 00:03.24
10. Luvi1a
14
 00:03.27
11. lavaduck
29
 00:03.28
12. huohuo2004
42
 00:03.54
13. Idiot! ¯\_(ツ)_/¯
7
 00:03.59
14. cyrex45
13
 00:03.68
15. ciisq
6
 00:03.70
15. steve415723
16
 00:03.70
17. cliper162 00:03.75
18. StJavelin
4
 00:03.83
19. PiMaster1
3
 00:03.92
20. dave dave
12
 00:04.04
This Week
1. Chen Jiakai
20
 00:03.38
2. FxdeSlxyr
10
 00:03.54
2. huohuo2004
42
 00:03.54
4. cyrex45
13
 00:03.68
5. lennian123 00:04.08
6. Exxmurf
5
 00:04.24
7. Idiot! ¯\_(ツ)_/¯
7
 00:04.25
8. liang23 00:04.52
9. Nebbo 00:04.60
10. daspore 00:04.71
11. HDXX123456789 00:04.72
12. seabastian 00:04.94
13. llmt9
100
 00:04.95
14. realp 00:04.96
15. GeorgPfleger
100
 00:05.07
16. qobi
239
 00:05.12
16. bigtexican 00:05.12
18. MrMythicorn
120
 00:05.13
19. elementz 00:05.19
20. toryx68 00:05.47
Today
1. quarter
32
 00:08.65
2.--- empty -----:--
3.--- empty -----:--
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
217
 00:01.42
2. vowels
216
 00:01.80
3. CYrZx123
55
 00:01.95
4. nabi
92
 00:02.07
5. demian2
61
 00:02.29
5. BingBongBob
108
 00:02.29
7. coolcoolguy65
177
 00:02.43
8. jaybrainer
273
 00:02.54
9. numbrr
321
 00:02.70
10.anonymous
11
 00:02.73
AO5
1. zahhydude1
217
 00:01.43
2. vowels
216
 00:01.94
3. CYrZx123
55
 00:02.05
4. nabi
92
 00:02.21
5. BingBongBob
108
 00:02.40
6. demian2
61
 00:02.44
7. coolcoolguy65
177
 00:02.59
8. numbrr
321
 00:02.61
9. jaybrainer
273
 00:02.88
10.anonymous
11
 00:02.89
AO12
1. zahhydude1
217
 00:01.67
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. demian2
61
 00:02.86
6. BingBongBob
108
 00:02.88
6. coolcoolguy65
177
 00:02.88
8.anonymous
11
 00:02.94
9. jaybrainer
273
 00:03.00
10. numbrr
321
 00:03.21
Robots / programmatic solversinfo  
1.dbut2
41
00:00.003
2.tlstyer
151
00:00.006
3.Charlie Li
61
00:00.211

* 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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