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Review and additional examples of turbot fish, 2string kites, skyscrapers. Locked candidates type ii the claiming variety. An explanation of the three propagation rules for correctly constructing loops & alternate inference chains.
Explanation of the very common unique rectangle solving technique. These focus on cells, rather than t. Allows for multiple candidate eliminations within a block.
Part 1 covers ur types 1, 2, 4 & 5. Applicable when there is only one digit possible for a particular cell. Sudoku xwing examples & tips (basic, finned sashimi).
Random tips & tricks / episode 8. Sudoku tutorial #5a part 2 / singles. Additional examples for finding singles in sudoku.