MESON Chess Problem Database

Problem Display
PID: 232778 (1b5n/1pqkP1K1/2Rp1R2/2pNpp2/8/1Q1N1B2/8/8 w - - 0 1)

Hoy, Paul

Freie Presse, 1975

1b5n/1pqkP1K1/2Rp1R2/2pNpp2/8/1Q1N1B2/8/8

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Sxe5#
    • 1...Kc8
      • 2.Sb6#
  • Tries
    • 1.Sxe5+?
      • 1...Kc8
        • 2.Sb6#
        • 2.Rf8#
      • 1...Ke8
        • 2.Rf8#
      • 1...dxe5!
    • 1.Rxc7+?
      • 1...Ke8
        • 2.Rf8#
        • 2.Qb5#
      • 1...Bxc7!
  • Keys
    • 1.Re6!
      • threat
        • 2.e8Q#
      • 1...Kxc6
        • 2.Sxe5#
      • 1...Kxe6
        • 2.Sxc5#
      • 1...Kc8
        • 2.Sb6#
      • 1...Ke8
        • 2.Sf6#
      • 1...Qd8
        • 2.Sf6#
      • 1...Qc8
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(g);P_PINP(G),P_SPINP(d),S_FLIGHT,XR(E)::S(B),XP(b)
    • K(g);P_PINP(G),P_SPINQ(f),S_FLIGHT::S(D)
  • Tries
    • Try
      • S(B);CHECK,XP(b)
      • Vars
        • K(g);P_PINP(G),S_FLIGHT::R1(F)
      • Refutation
        • P(d);XS(B)
    • Try
      • R(E);CHECK,XQ(f)
      • Refutation
        • B(h);XR(E)
  • Actual
    • R(F);
    • Threat
      • P=Q
    • Vars
      • K(g);P_PINP(G),P_SPINP(d),S_FLIGHT,XR(E)::S(B),XP(b)
      • K(g);P_PINP(G),P_SPINP(d),S_FLIGHT,XR(F)::S(B),XP(a)
      • K(g);P_PINP(G),P_SPINQ(f),S_FLIGHT::S(D)
      • K(g);P_PINP(G),S_FLIGHT::S(D)
      • Q(f);::S(D)
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).