Boden's Mate Puzzle One: White to move, Bishop mate in two1

♞      ♚ ♜ ♟ ♟ ♝ A B C D E F G H 8 ♜ ♝ ♛ ♞ 8 7 ♟ ♟ 7 6 6 5 ♕ 5 4 ♗ ♙ 4 3 3 2 ♙ ♙ ♙ 2 1 ♘ ♖ 1 A B C D E F G H

Boden's mate is an elegant mate executed by an attacking pair of bishops controlling diagonals which criss-cross on the squares directly in front of an enemy King on his home rank, hemmed in by friendly pieces unable to interpose against the final check. The mate is named for Samuel Boden who used the checkmate pattern during an 1853 friendly match Schulder-Boden in London. The first recorded instance of the pattern was a decade prior, at the conclusion of Horwitz-Popert in Hamburg, 1844.2

Boden's mate is most likely to occur when the opponent has castled queen-side with a weak pawn structure or material deficit. Very often the final set-up includes a Queen sacrifice on c6 (or c3) to force pxQ and thereby open the final diagonal allowing the second Bishop to deliver checkmate.

Skeletal example below:

¤ ♛               ¤ A B C D E F G H 8 ♚ 8 7 ¤ ♞ 7 6 ♗ 6 5 5 4 4 3 3 2 2 1 1 A B C D E F G H

Having learned about the function and mechanism of the Boden's Mate, try to apply those principles to this more complex position...

Boden's Mate Puzzle Two: White to move, mate in three1

     ♜     ♜ ♟           ♟ A B C D E F G H 8 ♚ ♞ 8 7 ♟ ♞ ♟ ♟ 7 6 ♟ ♟ 6 5 5 4 4 3 ♕ ♙ 3 2 ♙ ♗ ♙ 2 1 ♖ 1 A B C D E F G H

Sources

Solutions to puzzles

Solution to Boden's Mate Puzzle 1, Elyashov–NN, Paris 1948
MoveWhiteBlackAnnotation
1Qh6+NxQThis is a forced sacrifice. ♚ cannot escape due to ♗ on c4
2BxN#1-0Criss-crossing ♗ ♗ cannot be captured nor interposed

Solution to Boden's Mate Puzzle 2, The Peruvian Immortal Game: Canal–NN, Budapest, 1934
MoveWhiteBlackAnnotation
1Kd2QxR♔ offers a discovered sacrifice, to open A-file!
2Qxc6+!bxQThe trade of ♝ for ♖ ♖ quickly sours
3Ba6#1-0A Queen sacrifice often sets up the finishing blow

IronNoder 2018: 04/30