Sudoku: Perbezaan antara semakan
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Lim kongsoon (bincang | sumb.) |
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Baris 95:
[[Nikoli]] ''Sudoku'' are hand-constructed, with the author being credited beside each puzzle; the givens are always found in a symmetrical pattern. Dell ''Number Place Challenger'' (see Variants below) puzzles also list author credits. The ''Sudoku'' puzzles printed in most UK newspapers are apparently computer-generated but employ symmetrical givens; ''[[The Guardian]]'' licenses and publishes Nikoli-constructed ''Sudoku'' puzzles, though it does not include authoring credits. The Guardian famously claimed that because they were hand-constructed, their puzzles would contain "imperceptible [[witticism]]s" that would be very unlikely in computer-generated ''Sudoku''. The challenge to ''Sudoku'' programmers is teaching a program how to build ''clever'' puzzles, such that they may be indistinguishable from those constructed by humans; Wayne Gould required six years of tweaking his popular program before he believed he achieved that level.
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[[Image:Nonominosudoku.JPG|thumb|200px|A nonomino ''Sudoku'' puzzle]]
Another common variant is for additional restrictions to be enforced on the placement of numbers beyond the usual row, column, and region requirements. Often the restriction takes the form of an extra "dimension"; the most common is for the numbers in the main diagonals of the grid to also be required to be unique. The aforementioned ''Number Place Challenger'' puzzles are all of this variant, as are the ''Sudoku X'' puzzles in the ''[[Daily Mail]]'', which use 6×6 grids. The ''Daily Mail'' also features ''Super Sudoku X'' in its ''Weekend'' magazine: an 8×8 grid in which rows, columns, main diagonals, 2×4 blocks and 4×2 blocks contain each number once. Another dimension in use is digits with the same relative location within their respective regions; such puzzles are usually printed in colour, with each disjoint group sharing one colour for clarity.
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