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
179
 00:01.94
2. FxdeSlxyr
10
 00:02.86
3. Idiot! ¯\_(ツ)_/¯
7
 00:03.04
4. llmt9
101
 00:03.09
5. dbot
22
 00:03.17
6. Chen Jiakai
20
 00:03.24
7. huohuo2004
48
 00:03.54
8. cyrex45
17
 00:03.68
9. ciisq
7
 00:03.70
10. wturh
18
 00:03.81
11. StJavelin
4
 00:03.83
12. qobi
240
 00:03.86
13. CamPuzzle
38
 00:04.03
14. lennian123 00:04.08
15. Joseph12 00:04.15
16. geyik
218
 00:04.19
17. Poeut 00:04.22
18. OneaTy
24
 00:04.23
19. elementz 00:04.24
19. Exxmurf
5
 00:04.24
This Week
1. Idiot! ¯\_(ツ)_/¯
7
 00:03.58
2. llmt9
101
 00:04.08
3. OneaTy
24
 00:04.23
4. bigtexican 00:04.81
5. Macy
63
 00:04.92
6. kazanok
13
 00:05.04
7. falcondole
46
 00:05.09
8. zephyyyyxh
3
 00:05.19
9. SmthSmthPlayer 00:05.20
10. psy7891
3
 00:05.24
11. dirkdiggler 00:05.29
12. tuskmanjones
14
 00:05.39
13. Izzy777 00:05.44
14. Poeut 00:05.45
15. zhanglin1982
76
 00:05.53
15. FJL
17
 00:05.53
17. Tweej
2
 00:05.95
18. GeorgPfleger
100
 00:06.14
19. Lore1 00:06.20
20. ailisilob 00:06.32
Today
1. llmt9
101
 00:04.08
2. SmthSmthPlayer 00:05.20
3. zhanglin1982
76
 00:05.53
4. Tweej
2
 00:05.95
5. GeorgPfleger
100
 00:06.30
6. tsukishiro21
18
 00:06.68
7. bella091
97
 00:07.45
8. zephyyyyxh
3
 00:07.64
9. Manutea
2
 00:08.46
10. IanTheG
10
 00:09.40
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. zahhydude1
218
 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
179
 00:02.36
8. jaybrainer
275
 00:02.54
9. numbrr
322
 00:02.70
10.anonymous
11
 00:02.73
AO5
1. zahhydude1
218
 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
179
 00:02.55
8. numbrr
322
 00:02.61
9. jaybrainer
275
 00:02.88
10.anonymous
11
 00:02.89
AO12
1. zahhydude1
218
 00:01.67
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. coolcoolguy65
179
 00:02.79
6. demian2
61
 00:02.86
7. BingBongBob
108
 00:02.88
8.anonymous
11
 00:02.94
9. jaybrainer
275
 00:03.00
10. numbrr
322
 00:03.21
Robots / programmatic solversinfo  
1.dbut2
42
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.
You need to be logged in to track your averages

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