MESON Chess Problem Database

Problem Display
PID: 261618 (8/2pPk3/4P2P/5R1P/K2N1n1r/5Q2/8/5R2 w - - 0 1)

ten Cate, Pieter

Schweizerische Schachzeitung, 1977

8/2pPk3/4P2P/5R1P/K2N1n1r/5Q2/8/5R2

#2

9 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.d8Q#
    • 1...Kd8
      • 2.Sc6#
  • Tries
    • 1.Rf7+?
      • 1...Kd8
        • 2.Sc6#
        • 2.Qa8#
      • 1...Kd6!
    • 1.Qa8?
      • threat
        • 2.Qf8#
        • 2.d8Q#
      • 1...Kd6
        • 2.Qf8#
        • 2.d8Q#
      • 1...Sg6
        • 2.d8Q#
      • 1...Sxe6!
    • 1.Qa3+?
      • 1...Kd8
        • 2.Sc6#
        • 2.Rf8#
        • 2.Qf8#
      • 1...c5!
  • Keys
    • 1.Rd5!
      • threat
        • 2.d8Q#
      • 1...Kf6
        • 2.d8Q#
        • 2.d8B#
      • 1...Kd8
        • 2.Sc6#
      • 1...Kf8
        • 2.d8Q#
      • 1...Sxd5
        • 2.Qf8#
      • 1...Sxe6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(d);N_GUARD,S_FLIGHT::P=Q
    • K(d);N_GUARD,S_FLIGHT::S(D)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);P_PINS(D)::P=Q
      • Refutation
        • S(a);P_PINS(D),XP(G)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • R(E);
    • Threat
      • P=Q
    • Vars
      • K(d);P_SPINS(a),S_FLIGHT::P=Q
      • K(d);N_GUARD,S_FLIGHT::S(D)
      • S(a);OGATE,P_PINS(D),XR(E)::QAB1(B)
      • S(a);OGATE,P_PINS(D),XP(G)::QAB1(B)
HTML5 logo

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).