The blunders are all there on the board, waiting to be made.
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[Event "Porto San Giorgio"]
[Site "?"]
[Date "1997.??.??"]
[Round "?"]
[White "Glek, Igor"]
[Black "Lazarev, Vladimir"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "5Rk1/5rpp/p3Q3/1p1p4/4qp2/7P/5BP1/7K b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Black resigned in this winning position. Can you find the winning moves? } 1... Kxf8 2. Bc5+ Re7 ( { Black probably resigned because he saw that the
retreat of his king loses. } 2... Kg8 3. Qc8+ Qe8 4. Qxe8+ Rf8 5. Qxf8# ) 3. Bxe7+ Ke8 4. Qxe4 dxe4 5. Bg5 { Black's many passed pawns overwhelm white's
lone bishop. } 5... Kd7 6. Kg1 Ke6 7. Bxf4 b4 8. Bc1 a5 9. g4 Kd5 10. Kf2 a4 11. g5 a3 12. Ke2 Kc4 13. Bf4 b3 14. Kd1 Kd3 15. Kc1 e3 16. Bxe3 ( { White can try: } 16. Kd1 b2 17. Bxe3 b1=Q+ 18. Bc1 Qc2+ 19. Ke1 Qe2# ) 16... Kxe3 17. h4 Kd3 18. h5 a2 19. Kb2 a1=Q+ 20. Kxa1 Kc2 21. g6 b2+ 22. Ka2 b1=Q+ 23. Ka3 Qb3# 1-0