MESON Chess Problem Database

Problem Display
PID: 66438 (3B4/N6Q/6R1/3p4/1Rpkp3/P7/4P3/2K4N w - - 0 1)

Pongracz, Arnold

Schachzeitung der Berliner Schachgesellschaft, 1858

3B4/N6Q/6R1/3p4/1Rpkp3/P7/4P3/2K4N

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sb5#
    • 1...Kc5
      • 2.Bb6#
  • Tries
    • 1.Bb6+?
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke5!
    • 1.Bf6+?
      • 1...Kc5
        • 2.Qc7#
        • 2.Qe7#
      • 1...Ke3!
    • 1.Qh2?
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kc5
        • 2.Bb6#
      • 1...e3!
    • 1.Qe7?
      • 1...Kc3
        • 2.Sb5#
      • 1...e3
        • 2.Sb5#
      • 1...Ke3!
    • 1.Qf7?
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kc5
        • 2.Bb6#
      • 1...Ke5
        • 2.Sc6#
        • 2.Qf6#
      • 1...e3!
    • 1.Qg7+?
      • 1...Kc5
        • 2.Bb6#
        • 2.Be7#
        • 2.Rb5#
        • 2.Rc6#
      • 1...Ke3!
    • 1.Qh8+?
      • 1...Kc5
        • 2.Bb6#
        • 2.Be7#
        • 2.Rb5#
        • 2.Rc6#
      • 1...Ke3!
  • Keys
    • 1.Qh4!
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kc5
        • 2.Bb6#
      • 1...Ke5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::S(G)
    • K(b);N_SPINP(a),S_FLIGHT::B(I)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(G)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • B(I);CHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(G)
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(H)
        • K(b);N_SPINP(a),S_FLIGHT::B(I)
      • Refutation
        • P(c);
    • Try
      • Q(H);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(G)
        • P(c);::S(G)
      • Refutation
        • K(b);N_SPINP(a),P_SPINP(c),S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(G)
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(H)
        • K(b);N_SPINP(a),S_FLIGHT::B(I)
      • Refutation
        • P(c);
    • Try
      • Q(H);CHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::S(G)
      • K(b);N_SPINP(a),S_FLIGHT::QAB1(H)
      • K(b);N_SPINP(a),S_FLIGHT::B(I)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).