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John Nunn vs John van der Wiel
Hoogovens (1982), Wijk aan Zee NED, rd 12, Jan-29
Sicilian Defense: Velimirovic Attack (B89)  ·  1-0



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Kibitzer's Corner
Apr-25-07  PEANUTS: Nunn gives 35. Qe5 an exclam, and claims that Rd8 is then forced, but I prefer 35.. Rh5, 36. Bg5 Qb6 (Nunn gives only Rh8), 37. Qf6 Kb8, 38. Qf4+ Ka7, 39. Qd2 Qc7/Ka8 40. Be3 Ka8/Qc7 41. Qxb4 with some drawing chances (the rooks help Black I think). After 35.. Rd8, Black is lost (though 42.. Kc5 improves slightly).
Feb-24-08  RandomVisitor: After 28...Qa4:

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Rybkav2.3.2a.x64: 21-ply

<1. (2.84): 29.Rxg8> Rxg8 30.Nb3 Qb5 31.e5 a5 32.exd6+ Bxd6 33.Nxa5 Qa6 34.Qxb7+ Qxb7 35.Nxb7 Bg3 36.Nc5 Rxg7 37.Ka2 Rh7 38.Kb3 Rh2 39.Rd7+ Kc6 40.Rxf7 Re2 41.Bd4 Kd5

<2. (2.05): 29.Rc1> Rxh8 30.c4 Rhg8 31.Nb5+ Kd8 32.Qxb7 f6 33.Na7 Rc7 34.Bb6 Ke8 35.Qxc7 Rxg7 36.Qc6+ Qxc6 37.Nxc6 Rh7 38.Nxb4 Rh3 39.Rf1 d5 40.c5

3. (1.55): 29.Rdh1 Bf6 30.e5 Bxe5 31.R1h4 Rxh8 32.gxh8Q Rxh8 33.Nxe6+ Kd7 34.Rxh8 Bxh8 35.Qxb7+ Kxe6 36.Qc8+ Ke7 37.Qxh8 Qb5 38.Qh4+ Kd7 39.b3 Qf1+ 40.Bc1 Qxf3 41.Qxb4 Qd5 42.Qg4+ Qf5

4. (1.15): 29.Ne2 Qc6 30.Rxg8 Rxg8 31.Nd4 Qd7 32.Nb3 Kc8 33.Na5 Bxe4 34.Qxd7+ Kxd7 35.fxe4 Rxg7 36.Bc5 Rh7 37.Bxb4 Rh5 38.Nc4 d5 39.Nb6+ Kc6

5. (1.09): 29.Rh2 Rxg7 30.Rd3 Rcg8 31.c4 g5 32.c5 dxc5 33.Rc2 Rh7 34.Nxe6+ fxe6 35.Bxc5 Qxc2+ 36.Kxc2 Bxc5 37.Qxc5+ Kb8 38.Qxb4 Rc8+ 39.Kb3 Ka8 40.Qd6 Re8 41.Qg3

6. (0.98): 29.e5 Rxh8 30.Nxe6+ fxe6 31.exd6+ Bxd6 32.gxh8Q Rxh8 33.Qb6+ Kc8 34.Qxd6 Qc6 35.Qxb4 Rd8 36.Rxd8+ Kxd8 37.Bg5+ Kc7 38.Bf4+ Kd7 39.Qf8 g5 40.Qf7+ Kc8 41.Bxg5 Qxf3 42.Qxe6+ Kc7 43.Qe5+ Kd7 44.Qe7+ Kc6 45.b3 Qd1+

Premium Chessgames Member
  Tabanus: Picture from this game:
Feb-06-18  Nerwal: Long variation, wrong variation. Of all the possible ways to convert the advantage at move 28/29, Nunn chose one of the longest and weakest (as mentioned above after 35. ♕e5 ♖h5!? it's still not clear White wins). His play up to this point was excellent though.

The analyses given by Dvoretsky in Positional Play are very interesting and correct for the most part, but complex and rather confusing. What is the key to the position ?

White needs all his pieces working to the maximum to attack the black king on the dark squares and the g7 pawn will be used as decoy. But for this to put the knight on d4 is tactically not so good. The knight interferes with the activity of both the rook and bishop, while on b3, White still has the important ressources ♘a5 and ♘c5 (often after e5 dxe5). So, the most convincing ways to win the position are 28. ♖d4! (to give check on c4) d5 29. ♖xg8 ♖xg8 30. ♗f4+ and 28. ♖xg8 ♖xg8 29. e5! d5 (after dxe5 something lands on c5) 30. ♖h1! (Movsesian /Kramnik).

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