Thursday, March 16, 2006

16x16 hypercube sudoku

This is with the hypercube, or sudoku6, constraints, i.e., 6 regions per cell.

.............E..
.......G........
...............1
..C.........4...
................
................
................
................
..6.GD..........
.........E......
..............7.
...........7....
....3......F.8..
.....B....8...A.
........9.......
..............26

20 clues
30 hours(!) to generate
44 minutes to solve(!)

Removing any clue destroys the uniqueness of the solution.

unique solution:
A5GD8147C936FEB2
1478EFDG5A2B9C63
3BE962AC78F4DG51
26CFB395GD1E478A
4F839C2E1B756ADG
C952A834F6GDB1E7
GD1657BFE3CA2498
7EABDG61824935FC
E761GDFB24A853C9
DGBA75163E9C824F
FC254983B1DGA67E
9834CAE26F571BGD
B29C365ADGEF7814
63FE2BC94781GDA5
8A471EGD9562CF3B
51DGF478ACB3E926

Another one

......7...B.....
.....9..........
........3.......
................
...............6
.......4........
......G.......DF
.1..............
..6..........E..
.....G......21F.
C...........A...
.............C..
................
................
......5.........
.....4..........


A5E3GC7F6DB98412
4FG1E9A5C287B36D
9B28D1463EFA57CG
76DC283B1G54FA9E
B7FD5291EA48CG36
3C52FDB4961G78EA
64AE83GC257B19DF
G189AE67DFC34B25
196G4B8AF32CDE57
8A7B6GC354DE21F9
CD357FE2G891A6B4
E24F951DB7A63CG8
28C436DE71G59FAB
DE961728AB3FG54C
FG17BA594C6DE283
53BAC4FG89E26D71

21 clues
64 hours to generate
100 minutes to solve

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