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
181
 00:26.12
2. dimitar243 00:39.34
3. Layfort 00:46.89
4. NunSmacker 00:46.90
5. cyrex45
27
 00:48.33
6. 耒Donatien豕
8
 00:55.63
7. LeeDi 00:56.56
8. tanginess
48
 00:59.94
9. Cezen
13
 01:01.11
10. ademovski
25
 01:02.81
11. GavinRose
7
 01:06.52
12. rosepetals
34
 01:07.11
13. gotFunk 01:08.25
14. Elliot20 01:10.75
15. dirkdiggler 01:11.71
16. PuzzleMaestro
105
 01:12.35
17. jph1
32
 01:12.52
18. SniffTO 01:15.02
19. oli g
35
 01:16.05
20. avishK
22
 01:19.00
This Week
1. coolcoolguy65
181
 00:39.41
2. dimitar243 00:46.26
3. Layfort 00:46.89
4. LeeDi 00:56.56
5. ademovski
25
 01:02.81
6. GavinRose
7
 01:06.52
7. Elliot20 01:10.75
8. PuzzleMaestro
105
 01:12.35
9. SniffTO 01:15.02
10. dirkdiggler 01:15.29
11. wallickdeez
28
 01:19.97
12. cyrex45
27
 01:20.21
13. bantz
64
 01:20.50
14. GeorgPfleger
101
 01:26.44
15. eatatjoes
19
 01:30.67
16. rosepetals
34
 01:31.69
17. loser.emi
21
 01:32.53
18. RaiT
121
 01:35.54
19. charwood 01:36.22
20. Tetra55 01:42.28
Today
1. Layfort 00:52.06
2. GavinRose
7
 01:06.52
3. dirkdiggler 01:15.29
4. LeeDi 01:18.03
5. charwood 01:36.22
6. wallickdeez
28
 01:57.13
7. anushka04
12
 02:16.40
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. coolcoolguy65
181
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. ypw19
94
 00:49.02
5. demian2
61
 00:55.33
6. zahhydude1
218
 00:55.76
7. numbrr
325
 00:56.76
8. rosepetals
34
 00:57.60
9. tanginess
48
 00:57.73
10. qqwref
266
 00:57.96
AO5
1. coolcoolguy65
181
 00:36.86
2. vowels
216
 00:44.38
3. ypw19
94
 00:51.43
4. bearn
206
 00:53.87
5. zahhydude1
218
 00:57.56
6. rosepetals
34
 00:59.61
7. tanginess
48
 01:00.67
8. keehaag
170
 01:00.96
9. qqwref
266
 01:01.66
10. JZE
88
 01:01.76
AO12
1. coolcoolguy65
181
 00:42.27
2. vowels
216
 00:51.97
3. ypw19
94
 00:55.60
4. bearn
206
 01:00.73
5. dbot
22
 01:09.80
6. zahhydude1
218
 01:10.35
7. qqwref
266
 01:11.21
8.anonymous
62
 01:12.93
9. JZE
88
 01:13.36
10. keehaag
170
 01:15.01
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
154
00:00.008
3.Charlie Li
61
00:00.224

* 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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