This is quiz 24 from The Art of the Checkmate by Renaud & Kahn.
Black to play and win
rn3rk1/pp3ppp/3b1n2/2pPq3/2B1P3/1NN2bP1/PPPQ1P1P/R1B2RK1 b - - 0 1
The authors give this as the winning line:
1... Qh5 2. Be2 (as Black was threatening Qh3-g2#) Ng4 (threatening mate on h2) 3. h4 Qxh4 4. gxh4 Bh2#
However, I think White has a simple refutation:
2. Re1 prepares Bf1, stopping the Qh3-g2 threat, and Ng4 threats can be nullified with h4, as the Queen sacrifice doesn't work now as the King has a flight square
So, my questions are:
- Is there a forced win (mate or material)?
- If so, what is it?
- If not, what's the best move?