MESON Chess Problem Database

Problem Display
PID: 226464 (8/3p4/Q5K1/4k3/3Nr3/P7/1B1P3N/4R3 w - - 0 1)

Gold, Samuel

Deutsche Schachzeitung, 1891

8/3p4/Q5K1/4k3/3Nr3/P7/1B1P3N/4R3

#2

8 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qf6#
  • Tries
    • 1.Sf5+?
      • 1...Kf4
        • 2.Rf1#
        • 2.Qf1#
      • 1...Kd5!
    • 1.Qb5+?
      • 1...Kf4
        • 2.Qg5#
      • 1...d5
        • 2.Qb8#
      • 1...Kd6!
    • 1.Qa5+?
      • 1...Kf4
        • 2.Qg5#
      • 1...d5
        • 2.Qc7#
      • 1...Kd6!
  • Keys
    • 1.Qc4!
      • 1...Kf4
        • 2.Se2#
      • 1...Kd6
        • 2.Sf5#
      • 1...Rxe1
        • 2.Sb5#
        • 2.Sf5#
      • 1...Re2
        • 2.Sb5#
        • 2.Sf5#
      • 1...Re3
        • 2.Sb5#
        • 2.Sf5#
      • 1...d5
        • 2.Qc7#
      • 1...d6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(G)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_SPINR(a),OGATE,S_FLIGHT::QAB1(G)
        • P(c);N_GUARD,P_SPINP(c),SBLOCK::QAB(G)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_SPINR(a),OGATE,S_FLIGHT::QAB1(G)
        • P(c);N_GUARD,P_SPINP(c),SBLOCK::QAB(G)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(b);N_SPINR(a),S_FLIGHT::S(F)
      • P(c);N_GUARD,SBLOCK::QAB(G)
      • P(c);SBLOCK::B(B)+S(F)
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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).