Tsao, Hung-ping (2023). Cracking Sudoku down completely. In: “Evolutionary Progress in Science, Technology, Engineering, Arts, and Mathematics (STEAM)”, Wang, Lawrence K. and Tsao, Hung-ping (editors). Volume 5, NUMBER 6A, June 2023; 125 pages. Lenox Institute Press, Auburndale, MA, 02466, USA. No. STEAM-VOL5-NUM6A-JUN2023; ISBN 978-0-9890870-3-2. …… ABSTRACT: This is an e-version of the author’s paperback book in Chinese published ten years ago, the English version of which will also be e-published shortly. Based on his ten years of experience in challenging numerous Sudoku puzzles devised by the world’s top-ranked masters, the author had developed a unique step-by-step puzzle solving procedure by way of using subscripts and brief annotations. This unique feature can manifest the logical underpinning of puzzle-unfolding process and thus enable readers, especially the seniors and minors, walk through with the author the clear path of how a Sudoku puzzle being solved.