![]() ![]() Players also can gain additional clues by changing the colour assigned to the each digit and watching the unfolding changes in the pattern of colours. If a black square is encountered then a mistake has been made. More usefully an empty square that has the same colour as a completed square must contain the same digit. This gives players major clues as darker coloured empty squares imply fewer number possibilities. The empty square's colour is the combination of the colours assigned to each possible digit. Empty squares are coloured according to which digits are possible for that square taking account of all current entries in the square's row, column and region. Squares containing a digit are coloured according to the digit's colour. If c61, then still c31.The colour Sudoku adds another dimension to solving the puzzle by assigning a colour to each digit. If a4=1 and h6=1, then neither a8=1 nor h8=1.In this example, think of the blue cell at c6 as the starting point. This step could be written as: fc on 1's: d8 = f9 - g9 = g3 - i1 = a1 forbids a8=1 Interesting coloring example Thus, sans further grid examination, we know that a81.1's in row 1 limited to two locations:i1,a1.1's in column g limited to two locations: g9,g3.1's in box e8 limited to two locations: d8,f9.This example is one step deeper then the previous two. Coloring Example From Tough Puzzle of 12/23/06 In my humble opinion, such a grouping adds The elimination above is missed by programs such as the solver in Simple Sudoku Then learning each specific technique involving just one number is superfluous. However, if one generalizes the idea of coloring, Technique names are almost as much fun as the puzzles. To understand this idea - it will help though, both in clear communication and ![]()
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