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. caelum 00:33.89
2. supertf
38
 00:34.18
3. oli g
29
 00:37.42
4. CamPuzzle
30
 00:45.31
5. NunSmacker 00:47.12
6. GeorgPfleger
99
 00:51.05
7. bantz
53
 00:52.65
8. MadraMor
161
 00:54.55
9. Hedran
111
 00:56.88
10. deathgnome
23
 00:58.36
11. daine
23
 00:59.31
12. GLWrath
33
 01:00.54
13. jossdot 01:00.68
14. Oryn
179
 01:02.84
15. qobi
237
 01:04.86
16. Wiggs42
11
 01:07.64
17. yydarby 01:08.90
18. SandrDM1
65
 01:08.99
19. shhhhmbiote 01:09.87
20. Valou
13
 01:10.89
This Week
1. supertf
38
 00:34.18
2. caelum 00:39.35
3. NunSmacker 00:48.47
4. deathgnome
23
 00:58.36
5. jossdot 01:00.68
6. Valou
13
 01:10.89
7. EllyB 01:12.15
8. KeremhanXetalthSevin...
28
 01:15.18
9. .hata.
23
 01:22.29
10. GeorgPfleger
99
 01:23.22
11. obsessica 01:35.98
12. teacherW66 01:46.22
13. bayter
11
 01:52.29
14. ChanTianjie
10
 01:55.16
15. Hedran
111
 02:08.04
16. PawDub
52
 02:33.22
17. iShouldStudy 03:42.60
18. anonymmoon 04:39.50
19. vlad luca
17
 04:41.12
20. caihong 05:10.01
Today
1. ChanTianjie
10
 01:55.16
2. .hata.
23
 02:19.43
3. anonymmoon 04:39.50
4. caihong 05:10.01
5. 0mega
209
 05:13.82
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
175
 00:27.60
2. vowels
216
 00:31.91
3. bearn
206
 00:35.40
4. zahhydude1
213
 00:35.59
5. demian2
61
 00:35.74
6. numbrr
321
 00:35.88
7. ypw19
91
 00:35.90
8. JZE
88
 00:38.08
9. sfumato
168
 00:42.83
10. Icay
195
 00:42.93
AO5
1. coolcoolguy65
175
 00:30.02
2. vowels
216
 00:31.91
3. JZE
88
 00:37.20
4. demian2
61
 00:37.73
5. zahhydude1
213
 00:37.79
6. numbrr
321
 00:38.80
7. bearn
206
 00:38.87
8. Icay
195
 00:43.17
9. ypw19
91
 00:43.46
10. sfumato
168
 00:46.40
AO12
1. coolcoolguy65
175
 00:37.11
2. vowels
216
 00:39.61
3. zahhydude1
213
 00:43.79
4. JZE
88
 00:44.03
5. numbrr
321
 00:44.37
6. bearn
206
 00:44.46
7. Icay
195
 00:49.29
8. ypw19
91
 00:52.89
9. mtanzer
140
 00:54.07
10. qqwref
266
 00:56.08
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.007
2.Charlie Li
61
00:00.222
3.Paul Bismuth
1
00:04.179

* 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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