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. CamPuzzle
25
 00:20.10
2. oli g
27
 00:21.32
3. ludanin
16
 00:21.53
4. fyro1 00:25.05
5. GoldChoco36
156
 00:28.61
6. dsdat 00:28.98
7. Lillenuusutaja 00:31.83
8. NunSmacker 00:32.52
9. bantz
44
 00:32.89
10. qobi
236
 00:33.77
11. Chen Jiakai
20
 00:36.00
12. Kukko
174
 00:36.04
13. GeorgPfleger
97
 00:36.22
14. obsessica 00:36.61
15. finnn 00:36.76
16. nyahr 00:38.10
17. andrjuha1753
10
 00:38.29
18. AuroraSrc
37
 00:38.47
19. Oryn
176
 00:39.01
20. dave dave
12
 00:39.58
This Week
1. CamPuzzle
25
 00:23.51
2. GoldChoco36
156
 00:28.61
3. oli g
27
 00:30.26
4. NunSmacker 00:32.52
5. Lillenuusutaja 00:34.64
6. Chen Jiakai
20
 00:36.00
7. nyahr 00:38.10
8. andrjuha1753
10
 00:38.29
9. teacherW66 00:40.27
10. deathgnome
10
 00:43.25
11. shhhhmbiote 00:43.92
12. GeorgPfleger
97
 00:44.40
13. ryrycrycry
52
 00:45.96
14. zetaxiupsilon 00:47.37
15. yiziki
2
 00:51.00
16. gacha160
4
 00:51.36
17. drla30
2
 00:53.00
18. puzzleheaded19 01:05.32
19. Ricter 01:20.63
20. Shikacouille 01:22.30
Today
1. nyahr 00:38.10
2. Chen Jiakai
20
 00:46.81
3. yiziki
2
 00:51.00
4. GeorgPfleger
97
 00:53.64
5. shhhhmbiote 01:31.82
6. Taronn 02:44.54
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. zahhydude1
212
 00:17.66
2. vowels
216
 00:17.91
3. demian2
61
 00:19.43
4. coolcoolguy65
174
 00:19.84
5. bearn
206
 00:20.58
6. numbrr
318
 00:20.86
7. JZE
87
 00:21.12
8. Luke Pickett
75
 00:22.75
9. ypw19
91
 00:25.10
10. Icay
195
 00:25.90
AO5
1. vowels
216
 00:18.50
2. zahhydude1
212
 00:19.23
3. demian2
61
 00:21.11
4. coolcoolguy65
174
 00:21.75
5. JZE
87
 00:21.89
6. bearn
206
 00:22.87
7. numbrr
318
 00:23.97
8. Luke Pickett
75
 00:24.18
9. ypw19
91
 00:24.52
10. qqwref
266
 00:26.32
AO12
1. vowels
216
 00:22.07
2. zahhydude1
212
 00:24.21
3. coolcoolguy65
174
 00:25.09
4. bearn
206
 00:26.73
5. numbrr
318
 00:29.02
6. ypw19
91
 00:29.47
7. JZE
87
 00:29.51
8. Luke Pickett
75
 00:30.90
9. Icay
195
 00:31.14
10. qqwref
266
 00:32.21
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.007
2.Charlie Li
61
00:00.213
3.Paul Bismuth
1
00:03.112

* 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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