Mate in three vs Black to move

Start Analysis Engine to see Solution #4411 Chess: 5334 Problems, Combination | Cleanchess.com | 1 Jul 2017

1014390

[Event "Start Analysis Engine to see Solution #4411 Chess: 5334 Problems, Combination"] [Site "Cleanchess.com"] [Date "2017.07.01"] [Round "0"] [White "Mate in three"] [Black "Black to move"] [FEN "1r1r4/8/1n6/2p5/2P5/1NK5/R6R/1k6 b - - 0 1"] 1... Na4+ 2. Rxa4 Rxb3+ 3. Kxb3 Rd3# *

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