Pierre Berlacki – Roberto Cosulich
8th International Festival; Catanzaro, April 1977
Pirc Defence B07
8th International Festival; Catanzaro, April 1977
Pirc Defence B07
Comments in quotation marks by Grandmaster Enrico Paoli, Scacco!, No. 6, June 1972, p. 171.
1. d4 g6 2. Nf3 Nf6 3. Nbd2 Bg7 4. e4 d6 5. Be2 0-0 6. 0-0 Nc6 7. c3 e5. 7. ... Re8!? 8. Re1 (8. e5!) 8. ... e5! 9. dxe5?! Nxe5 10. Nxe5 Rxe5 gave Black comfortable equality in Cosulich – P. C. Benkö, 13th New Year's International Tournament, Reggio Emilia 1970/71.
8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qc2 c6. Dubious is 10. ... Be6?! 11. Nf3 Nd7 12. Ng5 Qe7 13. Rd1 Rfd8 14. Be3 Nf8 15. Nxe6 Nxe6 16. Qb3 b6 17. Bc4⩲ B. Larsen – Quinteros, 3rd Gran Torneo Internacional de Ajedrez “Ciudad de Las Palmas de Gran Canaria”, Las Palmas 1974. Instead, both 10. ... b6 and 10. ... Bh6! (a recommendation by Slovene-Yugoslav Grandmaster Bruno Parma) merit consideration.
11. a4 Qc7 12. Nc4 Be6 13. Bg5. “A provocative move whose purpose is quite unclear”.
13. ... h6 14. Be3 b5?! 15. Nd2 a6 16. Rfd1. “To be considered is 16. Ra3, with the idea of doubling Rooks on the a-file to take advantage of the dubious advance of Black Pawns on the Queenside. If now 16. ... Rfd8 17. Re1 Bf8 18. b4 with complications favourable to White”.
16. ... Rfb8 17. b3 Bf8 18. c4 Ng4 19. Bxg4 Bxg4 20. f3 Be6 21. cxb5 axb5 22. axb5 Rxa1 23. Rxa1 Rxb5 24. Ra6 c5 25. Ra8 Kg7. “Now someone might speculatively argue that there was justification for the move 13. Bc1-g5. However, Black could have avoided the loss of the Pawn with 25. ... g5 (26. h4 f6). If he loses it, it is because he thinks he can tactically profit from it. The g1-b6 diagonal will be weakened”.
26. Bxh6+ Kxh6 27. Rxf8 c4?! “With the dual threat of gaining the Rook (... Qc7-c5+) or taking possession of the b-file (... Qc7-b6+). White avoids the first, but not the second”.
28. bxc4. “If 28. Ra8 c3!∓”.
Indeed, after 28. Ra8, Black has a much more convincing rejoinder in 28. ... Qb6+ 29. Kh1 cxb3−+.
28. ... Qb6+
1. d4 g6 2. Nf3 Nf6 3. Nbd2 Bg7 4. e4 d6 5. Be2 0-0 6. 0-0 Nc6 7. c3 e5. 7. ... Re8!? 8. Re1 (8. e5!) 8. ... e5! 9. dxe5?! Nxe5 10. Nxe5 Rxe5 gave Black comfortable equality in Cosulich – P. C. Benkö, 13th New Year's International Tournament, Reggio Emilia 1970/71.
8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qc2 c6. Dubious is 10. ... Be6?! 11. Nf3 Nd7 12. Ng5 Qe7 13. Rd1 Rfd8 14. Be3 Nf8 15. Nxe6 Nxe6 16. Qb3 b6 17. Bc4⩲ B. Larsen – Quinteros, 3rd Gran Torneo Internacional de Ajedrez “Ciudad de Las Palmas de Gran Canaria”, Las Palmas 1974. Instead, both 10. ... b6 and 10. ... Bh6! (a recommendation by Slovene-Yugoslav Grandmaster Bruno Parma) merit consideration.
11. a4 Qc7 12. Nc4 Be6 13. Bg5. “A provocative move whose purpose is quite unclear”.
13. ... h6 14. Be3 b5?! 15. Nd2 a6 16. Rfd1. “To be considered is 16. Ra3, with the idea of doubling Rooks on the a-file to take advantage of the dubious advance of Black Pawns on the Queenside. If now 16. ... Rfd8 17. Re1 Bf8 18. b4 with complications favourable to White”.
16. ... Rfb8 17. b3 Bf8 18. c4 Ng4 19. Bxg4 Bxg4 20. f3 Be6 21. cxb5 axb5 22. axb5 Rxa1 23. Rxa1 Rxb5 24. Ra6 c5 25. Ra8 Kg7. “Now someone might speculatively argue that there was justification for the move 13. Bc1-g5. However, Black could have avoided the loss of the Pawn with 25. ... g5 (26. h4 f6). If he loses it, it is because he thinks he can tactically profit from it. The g1-b6 diagonal will be weakened”.
26. Bxh6+ Kxh6 27. Rxf8 c4?! “With the dual threat of gaining the Rook (... Qc7-c5+) or taking possession of the b-file (... Qc7-b6+). White avoids the first, but not the second”.
28. bxc4. “If 28. Ra8 c3!∓”.
Indeed, after 28. Ra8, Black has a much more convincing rejoinder in 28. ... Qb6+ 29. Kh1 cxb3−+.
28. ... Qb6+
29. Kf1? “After 29. Kh1! (but it took courage — and the ability to concretely calculate all variations), no clear finish line for Black is visible. For example: 29. ... Rb2 30. Qc1 Qe3 (30. ... Kg7? 31. c5! Qb4 32. Rd8) 31. Rd8 Bxc4 32. h3 etc. If 30. ... Qf2 31. Rd8 Kg7 32. h3 etc.
29. ... Rb2 30. Qc1. “If 30. Qc3 (or 30. Qd3), Black wins at once by 30. ... Bxc4 31. Qxc4 Rxd2 32. Rh8+ Kg5! (32. ... Kg7? 33. Rh7+! Kxh7 34. Qxf7+ Kh6 35. Qf8+ Kg5 36. h4+! and wins. So Black must content himself with perpetual: 35. ... Kh7 etc.) 33. h4+ Kf4 34. Qxf7+ Kg3”.
30. ... Kg7 31. Rd8. “Even 31. Ra8 does not change the result either: 31. ... Bxc4+ 32. Qxc4 Rxd2”.
31. ... Bxc4+ 32. Qxc4 Qxd8 0–1.
29. ... Rb2 30. Qc1. “If 30. Qc3 (or 30. Qd3), Black wins at once by 30. ... Bxc4 31. Qxc4 Rxd2 32. Rh8+ Kg5! (32. ... Kg7? 33. Rh7+! Kxh7 34. Qxf7+ Kh6 35. Qf8+ Kg5 36. h4+! and wins. So Black must content himself with perpetual: 35. ... Kh7 etc.) 33. h4+ Kf4 34. Qxf7+ Kg3”.
30. ... Kg7 31. Rd8. “Even 31. Ra8 does not change the result either: 31. ... Bxc4+ 32. Qxc4 Rxd2”.
31. ... Bxc4+ 32. Qxc4 Qxd8 0–1.


















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