White to play and checkmate.
What is the least amount of moves that White can checkmate Black assuming both sides play optimally?
Give your answer as the White moves in concatenated form of the number part of the coordinates where the piece moves to (e.g.: etc.) with the least amount of moves to checkmate at the end.
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Relevant wiki: Chess Puzzles
1.Qc2 Nc5 2.Nc7 Na3 3.Qd1 Bxe4 4.Bxe4+ Nxe4 5.Qd5+ Kb6 6.Na8+ Ka6 7.Qc6+ Ka5 8.Qb6+ Ka4 9.Qb3+ Ka5 10.Bc7+ Ka6 11.Qb6#