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
174
 00:24.64
2. oli g
22
 00:40.93
3. numbrr
312
 00:43.33
4. DukeAmsterdam
77
 00:44.71
5. nessaim 00:55.87
6. vyslaud
17
 00:56.21
7. Cormachine 00:59.90
8. obsessica 01:02.23
9. xSaqe
15
 01:03.58
10. miggy
160
 01:04.31
11. sillydomi
11
 01:04.39
12. elinor0406 01:08.20
13. supertf
22
 01:09.79
14. loser.emi
19
 01:10.24
15. Jtf2 _PT
10
 01:13.26
16. rosebowl731
18
 01:13.74
17. Kecso 01:14.39
18. dave dave
7
 01:16.20
19. bantz
26
 01:16.35
20. ewnoodle
15
 01:17.30
This Week
1. coolcoolguy65
174
 00:24.64
2. oli g
22
 00:55.57
3. Cormachine 00:59.90
4. miggy
160
 01:04.83
5. elinor0406 01:10.80
6. rosebowl731
18
 01:13.74
7. supertf
22
 01:16.27
8. Hjaka14
21
 01:17.40
9. obsessica 01:21.87
10. LowkyGG
19
 01:26.36
11. bantz
26
 01:33.79
12. Colleen2023 01:33.94
13. nicog8
10
 01:35.54
14. dead
6
 01:37.12
15. JamesRod 01:37.38
16. loser.emi
19
 01:39.36
17. PotatoSalad_
5
 01:40.45
18. GeorgPfleger
96
 01:53.25
19. eatatjoes
19
 01:55.19
20. ElPatron
11
 01:56.08
Today
1. oli g
22
 01:03.20
2. miggy
160
 01:04.83
3. obsessica 01:21.87
4. elinor0406 01:23.85
5. Colleen2023 01:33.94
6. Jamie Holland
16
 01:57.62
7. jedhen 01:58.48
8. loser.emi
19
 01:58.76
9. Nmmoinn 02:35.61
10. nyahr 02:49.06
11. alazyslump
13
 03:04.44
12. Octopusdo 03:39.30
13. lolzapolza 03:47.08
14. RafaelSetton 03:48.05
15. MDD33 04:59.69
16. AbdullahSuwaid
6
 05:27.99
17. BiggerManSizzle 06:17.19
18. LEIDI
5
 07:05.64
19.--- empty -----:--
20.--- empty -----:--
MO3
1. coolcoolguy65
174
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. demian2
61
 00:55.33
5. zahhydude1
211
 00:55.76
6. numbrr
312
 00:56.76
7. tanginess
45
 00:57.73
8. qqwref
266
 00:57.96
9. JZE
87
 00:58.13
10. DukeAmsterdam
77
 00:59.11
AO5
1. coolcoolguy65
174
 00:36.86
2. vowels
216
 00:44.38
3. bearn
206
 00:53.87
4. zahhydude1
211
 00:57.56
5. keehaag
169
 01:00.96
6. qqwref
266
 01:01.66
7. JZE
87
 01:01.76
8.anonymous
62
 01:02.17
9. tanginess
45
 01:02.53
10. hoodxxc
235
 01:03.89
AO12
1. coolcoolguy65
174
 00:44.38
2. vowels
216
 00:51.97
3. bearn
206
 01:00.73
4. zahhydude1
211
 01:10.35
5. qqwref
266
 01:11.21
6.anonymous
62
 01:12.93
7. JZE
87
 01:13.36
8. keehaag
169
 01:15.01
9. DukeAmsterdam
77
 01:15.45
10. mp3some
106
 01:16.44
Robots / programmatic solversinfo  
1.tlstyer
143
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.
You need to be logged in to track your averages

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