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Golang Sudoku Solver for Hard Sudoku Puzzles has been created by Jeyabalaji Subramanian. The solver uses goroutines and recursion to efficiently solve any valid sudoku fast. The project is hosted here for folks who want to head to code directly. The Solve solver employs two different sub-approaches to solve a Sudoku puzzle: mapping the eligible numbers (that can be filled) for each cell, filling cells which have just a single eligible number.