The Zukertort Opening is also known by another term "Reti Opening" and is characterized by the opening move 1. Nf3 although most sources define the Réti more narrowly by the sequence 1.Nf3 d5 2.c4.
TIGRAN PETROSIAN vs. LUDEK PACHMAN
It Bled, 1961
Zukertort Opening: Sicilian Invitation
1. Nf3, c5
2. g3, Nc6
3. Bg2, g6
4. 0-0, Bg7
5. d3, e6
6. e4, Nge7
7. Re1, 0-0
8. e5, d6
9. exd6, Qxd6
10. Nbd2, Qc7
11. Nb3, Nd4
12. Bf4, Qb6
13. Ne5, Nxb3
14. Nc4 ....
A tempo move.
14. .... Qb5
15. axb3, a5
The pawn advance prevents 16. Ra5.
16. Bd6, Bf6
If 16. ... Re8 then 17. Be5! ... creating a potential fork attack on d6 by Knight.
17. Qf3, Kg7
18. Re4 ! ....
Fischer commented at this point that Petrosian is preparing for a very beautiful finish.
18. .... Rd8
19. Qxf6+!!
19. .... Kxf6
20. Be5+, Kg5
If 20....Kf5, then 21. Ne3+ Kg5, 22. Bg7 ... with the same outcome as in the actual game.
21. Bg7, Resigns
There is no hope after 21....Nf5, 22. h4+ Nxh4, 23. gxh4+ then 24. Bf3+ or Bh3+ whichever way the Black King goes.
If 21….h5, then 22. h4+ Kf5, 23. Bh3 or Ne3 mate.
If 21….f5, then 22. h4+ Kh5, 23. Bf3 mate.
A gem of a game!
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