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Queen and Knight - an uneven, but strong Duo

A few days ago someone showed me an example, when White was able to start a decisive mate attack

 


As you have seen, Queen and Knight can be a very effective duo in a mate attack. Here another example. Queen and knight forced the black king into a mate net

 


Finally a very nice one that demonstrates the power of the Queen-Knight Duo. White gave two rooks and a knight bring that uneven pair into action




Commenti


  • 17 mesi fa

    Heinrich_24

    Thank you very much for that hint. Here the mentioned Leko-game. Pure actuality and illustration of the article

     



  • 17 mesi fa

    d4soldier

    peter leko read this post in the morning

  • 17 mesi fa

    Heinrich_24

    Thanks. Mago, for the complete analysis!

    By the way, 2. ... Kc8 3. Ne6! was game continuation in Bronstein - Ciric, when Black resigned.

    2... Kc8 {Dies war Partiefortsetzung} 3. Ne6! { Hier gab Schwarz auf, aber es gibt auch keine Rettung} Qc2+ 4. Kg5 Qc1+ 5. Kg6 Qc2+ 6. Kg7 Qc3+ (6... Qa4 7. Qc5+ Kb7 8. Qc7+ Ka6 9. Nc5+) 7. Kf7 Qb4 8. Qc6+ Kb8 9. Qc7+ Ka8 10. Qc8+ Qb8 11. Nc7#) (taken from diagramm created by myself)

  • 17 mesi fa

    CM ilmago

     
     

    Wow! I have known that queen and knight are said to be able to work together very well, each being able to do something that the other can't --- I remember some of GM Dejan Bojkov's excellent video lectures here on chess.com dealing with that theme.

    And I have seen many times how powerfully queen and rook can cooperate against an open king --- in such situations, always beware of a possible forced mate that is very likely to be there Smile

     

    With that, I am still very impressed, especially about the second example, where white's queen and knight (only helped by their king on the kingside, and a black pawn on a7 on the queenside, while blacks pieces are misplaced in the lower left and the black c-pawn is blocking the black pieces from being any help in defense) have a perfect mate chase against the black king. Some sidelines for that:

     

    [Date "????.??.??"]
    [Result "*"]
    [FEN "7Q/p3k3/8/4pKN1/2p5/6P1/Pn6/2q5 w - - 0 1"]

    1.Qxe5+ Kd7

    (1...Kf8 2.Ne6+ and the mating net on the kingside is finished, the queen will now mate beginningwith Qc7+ or Qb8+, and ending up with a mate like Qg7# or Qf8#)

    (1...Kd8 2.Ne6+ and blacks king goes down in the same mating net on the kingside)

    2.Qd5+ Kc7

    (2...Ke7 3.Qb7+ Kd6 4.Ne4# is a beautiful sideline :-) )

    (2...Ke7 3.Qb7 Ke8 ( 3...Kf8 4.Se6+ and mate, 3...Kd8 4.Ne6+ same kingside mate net) 4.Qf7+ Kd8 5.Ne6+ Kc8 6.Qc7# )

    (2...Ke8 3.Qf7+ Kd8 4.Ne6+ Kc8 5.Qc7#)

    (However, 2...Kc8!, denying white the chance to approach his knight with check, seems like the best and most tenacious defense to me that black should try. Then, 3.Qa8+!? Kc7! (3...Kd7? 4.Qb7+ and easy mate as above) 4.Ne6+ Kb6 5.Qb8+ Ka5 is good for white but very complicated to calculate to some advantageous end. So white would need to find the calm move 3.Ne6!, and the white mate threats have become so strong that black will have to give a lot of material after he has run out of the spite checks he now has.)

    3.Ne6+ Kb6

    (or else the white queen will now mate the black king directly in the top left corner by giving check on squares like b5, c6, c7, c8.)

    4.Qc5+ Ka6

    (4...Kb7 5.Qb5+ again followed by a quick forced mate ending with ...Ka8, Qc8#)

    5.Qa3+ Kb5

    (5...Kb7 (5...Kb6 is the same) 6.Qb4+ Kc6 (6...Ka6 7.Nc7#, 6...Ka8 7.Nc7#) 7.Qc5+ followed by quick forced mate on the top of the board, as in the following main lines)

    6.Nd4+ Kb6 7.Qb4+ Kc7 8.Ne6+ Kc6 9.Qc5+ Kb7

    ( 9...Kd7 10.Qc7+ Ke8 11.Qd8+ Kf7 12.Qf8# )

    10.Qb5+ Kc8 11.Qc6+ Kb8 12.Qc7+ Ka8 13.Qc8#
    *

     

    So it turns out that in the red sideline, probably the most stubborn try for black, white does not have an all-checks quick mate, but should go for a calm move approaching his knight and leaving the black king in an undefendable mating net. Almost as forcing as a mate with Q and R --- in such a situation, these would have mated with an all-checks mating sequence in such a situation for sure Smile

     
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