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
175
 00:30.67
2. miggy
163
 00:47.24
3. dimitar243 00:50.32
4. tanginess
46
 00:52.99
5. elinor0406 00:56.09
6. oli g
29
 00:56.84
7. Torlaine 00:58.06
8. daine
24
 00:58.64
9. bantz
57
 00:58.65
10. NunSmacker 00:59.22
11. rosepetals 01:00.21
12. mast3rfak3
21
 01:01.25
13. obsessica 01:01.72
14. Hjaka14
26
 01:01.79
15. supertf
39
 01:02.19
16. MisiMisi 01:07.32
17. Elliot20 01:07.53
18. CamPuzzle
30
 01:08.82
19. EllyB 01:08.96
20. bunionbobo
12
 01:11.79
This Week
1. dimitar243 00:50.32
2. NunSmacker 00:59.22
3. rosepetals 01:00.21
4. bunionbobo
12
 01:11.79
5. Oneirodynia 01:12.80
6. 구연모
15
 01:14.01
7. ddw06 01:18.04
8. wolnosaj 01:18.46
9. 50R3N6
10
 01:20.21
10. Hellkit
10
 01:24.15
11. Kryolight 01:24.80
12. Valou
25
 01:25.47
13. Kimac 01:28.52
14. GeorgPfleger
99
 01:28.90
15. Elliot20 01:31.43
16. Clivie 01:32.72
17. noffee 01:34.34
18. GraceL
9
 01:34.44
19. infamousmauve 01:45.58
20. Hjaka14
26
 01:45.98
Today
1. 구연모
15
 01:14.01
2. Elliot20 01:34.28
3. EliClark
22
 01:46.05
4. GeorgPfleger
99
 02:17.66
5. nyannyan
9
 02:32.53
6. Dorice
270
 02:41.84
7. karlutxo
12
 03:08.30
8. ShintaOlivia
4
 04:52.29
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. coolcoolguy65
175
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. demian2
61
 00:55.33
5. zahhydude1
215
 00:55.76
6. numbrr
321
 00:56.76
7. tanginess
46
 00:57.73
8. qqwref
266
 00:57.96
9. JZE
88
 00:58.13
10. DukeAmsterdam
78
 00:59.11
AO5
1. coolcoolguy65
175
 00:36.86
2. vowels
216
 00:44.38
3. bearn
206
 00:53.87
4. zahhydude1
215
 00:57.56
5. tanginess
46
 01:00.67
6. keehaag
169
 01:00.96
7. qqwref
266
 01:01.66
8. JZE
88
 01:01.76
9.anonymous
62
 01:02.17
10. hoodxxc
238
 01:03.89
AO12
1. coolcoolguy65
175
 00:44.38
2. vowels
216
 00:51.97
3. bearn
206
 01:00.73
4. zahhydude1
215
 01:10.35
5. qqwref
266
 01:11.21
6.anonymous
62
 01:12.93
7. JZE
88
 01:13.36
8. keehaag
169
 01:15.01
9. DukeAmsterdam
78
 01:15.45
10. mp3some
111
 01:16.44
Robots / programmatic solversinfo  
1.tlstyer
150
00:00.008
2.Charlie Li
61
00:00.224
3.Paul Bismuth
1
00:07.037

* 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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