While doing tactic puzzles I came across this one. Black to move and win. Can you solve it, and at the same time enjoy the beauty of the solution ? (I'll add the solution in the coming days). lichess.org/study/PF7ZuKjp/xX7lPYWL#1
Thank you for sharing, it was a good refresher! This is how I approached the puzzle: If it’s white to move, they at minimum have a draw with Qe5+ followed by Qc7+, if Kb5, Qd7+ Ka6 and Qa7+ draw. With this established, black basically has to play forcing moves. 1) 1. Qc3+ Kc1 Qa1# 2) 1. Qc3+ Kb1 2. Nd2+ Kc1 3. Nb3+ Kb1 4. Qa1#. Thus, Kc1 is out of the picture for white. 3) 1. Qc3+ Kb1 2. Nd2+ Ka2 3. Bb3+ cxb3 and white escapes.. so Nd2+ doesn’t work. 4) 1. Qc3+ Kb1 2. Bxc2+ Bxc2 and now Nd2 leads to mate in all variations under that line. Therefore, Kb1 has to be scraped. 5) Testing only other defense for white: 1. Qc3+ Ka2 and now 2. Bb3+ cxb3 and it is variation, the d2 square is vacant for the queen compared to 3) where the Knight was occupying it! 3. Qd2+ and mate ensues, so bxb3 does not work for black, we are getting close! 6) 1. Qc3+ Ka2 2. Bb3+ Kb1 and 3. Bxc2 again and we transpose into 4). 7) Now all variations are exhausted and lead to mate.