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For questions about latin squares, latin rectangles, their enumeration, their properties, generalisations and related combinatorial configurations such as MOLS (sets of Mutually Orthogonal Latin Squares).

2 votes

Number of solutions and minimal clues in Sixy Sudoku

As for the first question, a backtracking algorithm, see sixy.c at https://github.com/wilberdk/sixy shows there are 1936 completions of $$\matrix{1&2&3&4&5&6\cr *&*&*&*&*& *\cr *&*&*&*&*&*\cr *&*& …
Wilberd van der Kallen's user avatar