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
176
00:01.92
2. 50R3N6
17
00:02.13
3. FxdeSlxyr
9
00:02.34
4. Yuyinraoliang_1
18
00:02.47
5. Joseph12 00:03.05
6. oli g
31
00:03.08
7. llmt9
100
00:03.09
8. Chen Jiakai
20
00:03.12
9. dbot
22
00:03.17
10. DBWwushen
14
00:03.24
11. Luvi1a
13
00:03.27
12. lavaduck
27
00:03.28
13. Idiot! ¯\_(ツ)_/¯
6
00:03.47
14. steve415723
16
00:03.70
15. cliper162 00:03.75
16. StJavelin
4
00:03.83
17. elementz 00:03.89
18. PiMaster1
3
00:03.92
19. dave dave
12
00:04.04
20. Slexia 00:04.08
This Week
1. Yuyinraoliang_1
18
00:02.47
2. FxdeSlxyr
9
00:02.66
3. oli g
31
00:03.08
4. llmt9
100
00:03.09
5. Chen Jiakai
20
00:03.12
6. dbot
22
00:03.17
7. StJavelin
4
00:03.83
8. lanittt
18
00:04.29
9. dbut2
40
00:04.31
10. qobi
239
00:04.89
11. GeorgPfleger
99
00:05.01
12. Nebbo 00:05.33
13. elementz 00:05.45
14. Sports 00:05.74
15. diegosierral
7
00:05.81
16. pato3042 00:05.93
17. cananattsu 00:06.00
18. ItsBivo 00:06.18
19. PumpkinPants
10
00:06.28
20. HDXX123456789 00:06.45
Today
1. llmt9
100
00:03.09
2. dbot
22
00:03.17
3. Chen Jiakai
20
00:03.43
4. dbut2
40
00:04.31
5. GeorgPfleger
99
00:05.99
6. wallickdeez
11
00:06.59
7. bwall007
19
00:07.42
8. mago8 00:08.36
9. quarter
32
00:13.21
10. Kraehe 00:15.98
11. eloiiiiise
46
00:17.06
12. stadalbert6006 00:53.72
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. zahhydude1
216
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
176
00:02.43
8. jaybrainer
272
00:02.54
9. numbrr
321
00:02.70
10.anonymous
11
00:02.73
AO5
1. zahhydude1
216
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
176
00:02.59
8. numbrr
321
00:02.61
9. jaybrainer
272
00:02.88
10.anonymous
11
00:02.89
AO12
1. zahhydude1
216
00:01.67
2. vowels
216
00:02.02
3. CYrZx123
55
00:02.35
4. nabi
92
00:02.41
5. demian2
61
00:02.86
6. BingBongBob
108
00:02.88
6. coolcoolguy65
176
00:02.88
8.anonymous
11
00:02.94
9. jaybrainer
272
00:03.00
10. numbrr
321
00:03.21
Robots / programmatic solversinfo  
1.dbut2
40
00:00.005
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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