MESON Chess Problem Database

Problem Display
PID: 17230 (Knr5/RPkpP3/p7/8/1Q2b3/4N3/8/8 w - - 0 1)

ten Cate, Pieter

Munchner Schachzeitung, 1925

Knr5/RPkpP3/p7/8/1Q2b3/4N3/8/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.bxc8Q#
      • 2.bxc8R#
    • 1...Sc6+
      • 2.b8Q#
      • 2.b8B#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qd6#
        • 2.Qb6#
      • 1...Bxb7+
        • 2.Qxb7#
      • 1...Sc6+
        • 2.b8Q#
        • 2.b8B#
      • 1...d5
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...Kc6!
  • Keys
    • 1.Qc5+!
      • 1...Bc6
        • 2.Sd5#
      • 1...Sc6+
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_PINP(D),P-FLIGHT::PXR(f)=Q
    • S(e);CHECK,N_PINP(D),SBLOCK::P=Q
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XP(D)::QAR1(B),XB(a)
        • S(e);CHECK,N_PINP(D),SBLOCK::P=Q
        • P(d);N_PINP(D)::QAB1(B)
        • P(d);::QAB1(B),XP(d)
      • Refutation
        • K(c);N_PINP(D),P-FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • B(a);P_SPINB(a)::S(A)
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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).