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BIO- Morphic Chess Set

https://bishopschessart.blogspot.com/2022/12/biomorphic-chess-set.html

BackRank Mate - (Queen Sac, Knight - Rook Combo)

Tactics
Puzzles with this Technique

https://lichess.org/training/39lHz - 1700 Rated
https://lichess.org/training/BAmhO - 2186 Rated
https://lichess.org/training/t4SVa - 1768 Rated
https://lichess.org/training/9i2t1 - 2231 Rated
https://lichess.org/training/aBxP2 - 1948 Rated
https://lichess.org/training/c1xcs - 2070 Rated
https://lichess.org/training/PHKi3 - 2384 Rated
https://lichess.org/training/q2EZE - 2181 Rated
https://lichess.org/training/OfVwU - 2072 Rated
https://lichess.org/training/cvuPR - 2168 rated

Bishops Bounty - Back-rank Weakness lesson Links