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. dimitar243 00:37.54
2. coolcoolguy65
183
 00:38.82
3. Layfort 00:39.17
4. miggy
172
 00:50.75
5. rudi12 00:51.30
6. Marcus
21
 00:54.39
7. Elliot20 01:00.87
8. dirkdiggler 01:03.86
9. SniffTO 01:07.60
10. lazysloth 01:07.81
11. jph1
33
 01:10.26
12. bantz
66
 01:10.94
13. gotFunk 01:13.99
14. LeeDi 01:16.05
14. 5353535 01:16.05
16. GeorgPfleger
102
 01:16.72
17. qobi
243
 01:17.00
18. Tetra55 01:17.39
19. wallickdeez
32
 01:20.19
20. kazanok
24
 01:21.00
This Week
1. coolcoolguy65
183
 00:40.54
2. Layfort 00:44.21
3. miggy
172
 00:50.75
4. Marcus
21
 00:54.39
5. dirkdiggler 01:03.86
6. bantz
66
 01:12.26
7. 5353535 01:16.05
8. GeorgPfleger
102
 01:21.91
9. wallickdeez
32
 01:25.37
10. charwood 01:26.19
11. cyrex45
28
 01:27.53
12. Daveythe
80
 01:33.77
13. eatatjoes
19
 01:37.90
14. Akyte
14
 01:46.26
15. vvljvv 01:59.20
16. NOHJIWAN
38
 02:14.16
17. TituszPapp 02:16.69
18. jnWater 02:25.40
19. ModernOtter
8
 02:36.32
20. loser.emi
21
 02:39.31
Today
1. Layfort 00:50.31
2. GeorgPfleger
102
 02:30.83
3. uugerd
96
 03:44.32
4. wallickdeez
32
 04:47.20
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. coolcoolguy65
183
 00:32.42
2. vowels
216
 00:41.60
3. bearn
207
 00:45.18
4. ypw19
94
 00:49.02
5. demian2
61
 00:55.33
6. zahhydude1
221
 00:55.76
7. numbrr
328
 00:56.76
8. rosepetals
34
 00:57.60
9. tanginess
51
 00:57.73
10. qqwref
266
 00:57.96
AO5
1. coolcoolguy65
183
 00:36.86
2. vowels
216
 00:44.38
3. ypw19
94
 00:51.43
4. bearn
207
 00:53.87
5. zahhydude1
221
 00:57.56
6. rosepetals
34
 00:59.61
7. tanginess
51
 01:00.67
8. keehaag
172
 01:00.96
9. qqwref
266
 01:01.66
10. JZE
88
 01:01.76
AO12
1. coolcoolguy65
183
 00:42.27
2. vowels
216
 00:51.97
3. ypw19
94
 00:55.60
4. bearn
207
 01:00.73
5. dbot
22
 01:09.80
6. zahhydude1
221
 01:10.35
7. qqwref
266
 01:11.21
8. EarthyPixie
62
 01:12.93
9. JZE
88
 01:13.36
10. tanginess
51
 01:14.38
Robots / programmatic solversinfo  
1.dbut2
52
00:00.003
2.tlstyer
157
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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