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Grandmaster Chess Tactic

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White to move. How should white proceed?


Source: ChessToday.net
Chess Daily News from Susan Polgar

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18 Comments

  1. Yancey Ward Reply

    I could see the main plan almost immediately, but some calculation is required. White wants that c-pawn cleared out of the way so that the bishop can get at black’s king, so….

    1. Nb5!

    Threatens Nd6+ with all sorts of nasty ideas involving discovered checks and captures of the f8 rook etc. 1.Nb4 also attacks the black queen directly forcing black to deal with it. Black can either retreat the queen to b8 and give her up at d6 when the knight checks, or black can take the knight now:

    1. ……cb5 (best defense by far)
    2. Bb5

    Black can’t block this check with the knight since it is pinned to the queen at c7, so it must be blocked with the bishop….

    2. ……Bd7
    3. Bd7 Qd7 (Kd8 4.Qf8#)
    4. Rd7 Kd7

    And white’s edge is decisive.

  2. Anonymous Reply

    Nb5

  3. lupo33 Reply

    Nb5!

  4. Anonymous Reply

    Too hard!

  5. mikeypit Reply

    Nb5 looks interesting!

  6. mikeypit Reply

    Nb5 looks interesting!

  7. musato Reply

    Nb5

  8. PROF.S.G.BHAT Reply

    1.Nb5 cxb5
    (1…. Qb8 2.Rd8+ Kxd8 3.Qxf8+ Kd7 4.Rd1+ Nd5 5.Bxd5 cxd5 6.Rxd5+ Ke6 7.Rd6+ Qxd6 8.Qxd6+ Kf7 9.Nc7and the R also goes.)
    (1…. Qb6 2.Nd6+ and what black can do?)
    2.Bxb5+ Bd7
    3.Bxd7+ Qxd7
    4.Rxd7 Kxd7
    White has won Q for R and N.Black’s position is also not dynamic enough to survive the material deficit.I don’t find any quick win for white.Probably 5.Qxe5 seems good creating central passed P for dynamic thrust.If 5… Rxf2 6.Rd1+ Ke8 will discoonect the 2 Rs.

  9. David Reply

    1. Nb5 cxb5
    2. Bxb5 Bd7
    3. Bxd7 and mate or lose the queen.

    If 1. Nb5 Qc6
    2. Nd6+ and black is almost dead.

    If 1.Nb5 Qb8
    2. Rd8+ Kxd8
    3. Qxe8++

  10. pht Reply

    I pondered for a while about black’s plan Nd5 to enforce exchange of queens, and thought “if only a knight move could prevent this”, when I found:

    1. Nb5! cxb5

    The alternative was to move Q and allow Nd6+ followed by Qxf8. Hopeless. Must at least cost a rook.

    2. Bxb5+ Bd7 (Nc6 Qxc7 or Qc6 Bxc6 was Q loss directly)
    3. Bxd7+ Qxd7 (Enforced. Kd8?? Qxf8#)
    4. Rxd7 Kxd7
    5. Rd1+ …
    6. Rd5! …
    7. Rxe5
    game over.

  11. Anonymous Reply

    Kb5

  12. Anonymous Reply

    Nb5 cb ; Bb5

  13. Anonymous Reply

    Nb5 cb ; Bb5

  14. Anonymous Reply

    Nb5 cb ; Bb5

  15. Duh Reply

    Nb5

  16. Oleg Mezjuev Reply

    1. Nb5 Qa5 2. Nd6+ Kd7 3. Qxf8 etc. 1-0

  17. Harry Hariharan Reply

    1.Nb5! Wins for White!
    A>1…..cxb6.2.Bxb5+!.
    A1>2….Bd7.3.Bxd7+!
    A11>3…Kd8.4.Qxf8#!
    A12>3…Qxd7.4.Rxd7!!.Kxd7.5.Rd1+!.Kc6.6.Qxe7! And W has a Q for a R with an easy win!
    A2>2….Qc6.3.Bxc6+!.bxc6 and W has a Q for N+B with a continuing mating attack!
    A3>2….Qc7.3.Bxd7+!.Bxd7.4.Rxd7! And W wins as in variation A12!

    B>1…Qb8.2.Nd6+!.
    B1>2…Qxd6.3.Rxd6! And W has a Q for N with a easy win!
    B2>2…Kd8/7.3.Qxf8 and W has a free R with a devastating attack for an easy win!

    C>1….Qb6/a5,2.Nd6+!.Kd7/8.3.Qxf8 for an easy win as in B2!

  18. PROF.S.G.BHAT Reply

    In the sideline I missed a mate.
    1.Nb5 Qb8
    2.Rd8+ Kxd8
    3.Qxf8+ Kd7
    4.Rd1+ Nd5
    5.Bxd5 cxd5
    5…… cxb5 6.Qf7+ Kd8 7.Bc6+ Qd6 8.Rxd6+ Bd7 9.Qxd7#
    6.Rxd5+ Ke6
    7.Nd6     here I had suggested 7.Rd6+ but you have to retain R for the mate
    7…. Qc7     to prevent 8.Qf7#
    8.Ne8 Qe7
    9.Qf6# was threatened
    9.Ng7+ Qxg7
    10.Rd6#
    This may be irrelevant as it is a sideline.

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