Here he conjures up a mate from nothing dragging the King out into the open by a Queen sacrifice and cutting off the monarchs retreat to safety - forcing resignation from a world class player.
[Event "?"]
[Site "?"]
[Date "1961.??.??"]
[Round "?"]
[White "Petrosian"]
[Black "Pachman"]
[Result "1-0"]
[WhiteELO "?"]
[BlackELO "?"]
%Created by Caissa's Web PGN Editor
1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. d3 e6 6. e4 Nge7 7. Re1 O-O 8. e5
d6 9. exd6 Qxd6 10. Nbd2 Qc7 11. Nb3 Nd4 12. Bf4 Qb6 13. Ne5 Nxb3 14. Nc4 Qb5
15. axb3 a5 16. Bd6 Bf6 17. Qf3 Kg7 18. Re4 Rd8 19. Qxf6+ Kxf6 20. Be5+ Kg5
21. Bg7 1-0
[Site "?"]
[Date "1961.??.??"]
[Round "?"]
[White "Petrosian"]
[Black "Pachman"]
[Result "1-0"]
[WhiteELO "?"]
[BlackELO "?"]
%Created by Caissa's Web PGN Editor
1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. d3 e6 6. e4 Nge7 7. Re1 O-O 8. e5
d6 9. exd6 Qxd6 10. Nbd2 Qc7 11. Nb3 Nd4 12. Bf4 Qb6 13. Ne5 Nxb3 14. Nc4 Qb5
15. axb3 a5 16. Bd6 Bf6 17. Qf3 Kg7 18. Re4 Rd8 19. Qxf6+ Kxf6 20. Be5+ Kg5
21. Bg7 1-0