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RE: Extra tough Christmas chess riddle (#69). / Knacknuss-Weihnachtsschachrätsel (#69).

in #chess • 6 years ago

Hello @jaki, I hope you are having a happy holiday with your family.

Does black really lose in 17 moves? After short castling I do not see how black escapes from the checkmate:

  1. O-O Kf7
  2. Rc8 b1=Q
  3. Kd1+ Bf2
  4. Rxf2#
6 years ago in #chess by
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    • [-]
     6 years ago 
    1. 0-0 Kf7
    2. Rc8 Bg3
    [-]
     6 years ago 

    3.. Ng4+ Bf4
    4.. Nxe5+ Kf6
    5.. d4 (Threatening checkmate on f8) Kf5
    6.. g4+ Ke4
    7.. Re1+ Kxd4
    8.. Nf3+ Kd3
    9.. Rc3#

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    [-]
     6 years ago 

    :)

    1. 0-0 Kf5
    [-]
     6 years ago 

    2.. Nd1+ Kg4
    3.. Ne3+ Kg3
    4.. Rf3#
    Por
    2.. Nd1+ Kg4
    3.. Ne3+ Kh5
    4.. Rc8 Any move, checkmate on h8

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       6 years ago (edited)

      4. Rc8 g4 and black wins.

      [-]
       6 years ago 

      4.. g4+ Kh6
      5.. Rc8 Kh7
      6.. Rf8 checkmate is unstoppable on h8, White must avoid checks

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        [-]
         6 years ago 

        6. Rf8 b1Q+

        Continue, please! :)
        [-]
         6 years ago 
        1. 0-0 Kf5, 2. Sd1+ Kg4, 3. Se3+ Kh5, 4. g4+ Kh6, 5. Tc8 Kh7, 6. Tff8 b1D+, 7. Sf1 Lf2+, 8. Kh2 Lg3+, 9. Kg2
          und jetzt gibt es 2 Möglichkeiten:
        2. ... Dxd2+, 10. Sxd2 Dg1+ (10. ... Df1+, 11. Sxf1 nebst 12. Th8 Matt), 11. Kxg1 Lf2+ (oder 11. ... Lh2+), 12. Kh1/Kg2/Kf1 Schwarz beliebig, 13. Th8 Matt oder ganz schnöde 12. Txf2 nebst 13. Th2 Matt.
        3. ... Dxf1+, 10. Kxf1 Db1+ (oder 10 ... Da1+), 11. Kg2 Dg1+ ("zäher" als 11. ... Dh1+), 12. Kxg1 Lf2+ (oder 12. ...Lh2+) und jetzt wird es nebenlösig, denn man kann sowohl 13.Kf1, Kh1 oder Kg2 spielen und mit 14. Th8 mattsetzen als auch schnöde den Läufer mit 13. Txf2 schlagen und anschließend mit 14. Th2 matt setzen.
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         6 years ago 

        7.. Nf1 Qxf1+
        8.. Kxf1 Qb1+
        9.. Kg2 Qg1+
        10.. Kxg1 Bf2+
        11.. Kg2 Black doesn't have more checks to give

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           6 years ago 

          Btw.: happy Christmas days for you, too! :)