S, as in Sudoku by Bryce Herdt
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Theme: ¿¡¿Dos Unos en Una Fila?!? (“Translated” from a puzzle by Thomas Snyder on the 3rd SudokuCup
Author/Opus: This is the 4th puzzle from guest contributor Bryce Herdt.
Rules: Standard Sudoku rules. Also, in the cells with red letters, a number can only be entered if it contains that letter when spelled out in Spanish.
Answer String: Enter the 1st column from top to bottom, followed by a comma, followed by the 9th column from top to bottom.
Time Standards (highlight to view): Grandmaster = 7:30, Master = 12:00, Expert = 24:00
Solution: PDF
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16:43.Got broken at 6:10 at which point I realized that I failed to assign S as one of possible digits for 2 too.