Diabolical Sudoku Guide: Part 2 of 3: Y Wings and Empty Rectangles

Simon solves The Daily Telegraph's Diabolical Sudoku from 6 Sept 18, which proves a bit of a monster. Hence the solve is presented in three parts, with this part showing some Y-wing logic and the empty rectangle pattern.

Видео Diabolical Sudoku Guide: Part 2 of 3: Y Wings and Empty Rectangles канала Cracking The Cryptic