NewSearch gets a fan-in that will close the main resultsChan when all results are done. It passes TestHumanSolveAlmostSolvedGrid when used as Search, but has a sendOnClosed channel elsewhere so not ready for prime time yet.
NewSearch gets a fan-in that will close the main resultsChan when all results are done. It passes TestHumanSolveAlmostSolvedGrid when used as Search, but has a sendOnClosed channel elsewhere so not ready for prime time yet.

jkomoros/sudoku,jkomoros/sudoku,jkomoros/sudoku