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.

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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

This Month
1. Tobi Ente
122
00:07.43
2. JZE
83
00:07.85
3. Parade
18
00:14.73
4. Jen Jay
26
00:15.05
5. zebramachine 00:15.09
6. GeorgPfleger
89
00:15.52
7. Ailurus
176
00:15.73
8. qobi
227
00:16.72
9. Flexo
29
00:17.13
10. zibigibi
15
00:17.96
11. Rhododendron
132
00:20.06
12. Xatican 00:20.41
13. RichWoods 00:20.47
14. wow shibby
11
00:21.22
15. pouldu
97
00:21.49
16. Ruan
36
00:22.49
17. HDXX123456789 00:22.58
18. llmt9
82
00:23.47
19. becka 00:23.73
20. Dorice
242
00:27.44
This Week
1. GeorgPfleger
89
00:19.21
2. Rhododendron
132
00:20.06
3. RichWoods 00:20.66
4. leandroneckel 00:30.34
5. 苏小葵
24
00:33.55
6. SergeiG 00:34.06
7. HackMan
108
00:41.41
8. peclo 00:49.47
9. 崔杰
3
00:53.53
10. FunAcroFly
76
01:12.46
11. CLAVDIVS
56
01:13.48
12. JChas
5
01:17.74
13. wellwhynot
67
01:32.93
14. Ariadna
24
01:46.02
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. GeorgPfleger
89
00:20.74
2. RichWoods 00:24.03
3. HackMan
108
00:41.41
4.--- empty -----:--
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. zahhydude1
195
00:08.04
2. vowels
216
00:08.48
3. demian2
61
00:08.79
4. bearn
206
00:09.79
5. Tobi Ente
122
00:09.97
6. coolcoolguy65
151
00:10.12
7. JZE
83
00:10.15
8. numbrr
297
00:10.50
9. Vicellen
13
00:12.39
10. haramey
230
00:12.60
AO5
1. zahhydude1
195
00:08.32
2. vowels
216
00:09.47
3. demian2
61
00:09.82
4. JZE
83
00:10.15
5. Tobi Ente
122
00:10.47
6. numbrr
297
00:10.79
7. bearn
206
00:11.41
8. coolcoolguy65
151
00:12.11
9. sfumato
166
00:12.97
10. qqwref
259
00:13.05
AO12
1. zahhydude1
195
00:10.30
2. vowels
216
00:10.59
3. Tobi Ente
122
00:12.08
4. bearn
206
00:13.05
5. coolcoolguy65
151
00:13.11
6. numbrr
297
00:13.35
7. demian2
61
00:13.78
8. JZE
83
00:14.26
9. qqwref
259
00:15.82
10. sfumato
166
00:16.09
Robots / programmatic solversinfo  
1.tlstyer
121
00:00.006
2.Charlie Li
61
00:00.208
3.Paul Bismuth
1
00:02.423

* 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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2025-07-15 20:27:29

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