MESON Chess Problem Database

Problem Display
PID: 53433 (7K/nQ1nkPN1/4P1Rp/2p3rP/b4N1B/8/8/4R3 w - - 0 1)

Latzel, Gerhard Paul

Schach-Express, 1950

7K/nQ1nkPN1/4P1Rp/2p3rP/b4N1B/8/8/4R3

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.e7#
  • Tries
    • 1.Kg8?
      • threat
        • 2.f8Q#
      • 1...Kd8
        • 2.e7#
      • 1...Kd6!
    • 1.Sd5+?
      • 1...Kd6
        • 2.Se8#
      • 1...Kd8
        • 2.Qc7#
        • 2.e7#
      • 1...Kf8!
    • 1.Sf5+?
      • 1...Kd8
        • 2.e7#
      • 1...Kf8!
    • 1.Qxd7+?
      • 1...Kf8
        • 2.Qd6#
      • 1...Bxd7!
    • 1.f8B+?
      • 1...Kd8
        • 2.e7#
      • 1...Kxf8!
  • Keys
    • 1.Rf6!
      • threat
        • 2.f8Q#
      • 1...Kd6
        • 2.exd7#
      • 1...Kxf6
        • 2.Sd5#
      • 1...Kd8
        • 2.e7#
      • 1...Kf8
        • 2.e7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);N_SPINS(f),OGATE,S_FLIGHT::P(E)
  • Tries
    • Try
      • K(J);P-FLIGHT
      • Threat
        • P=Q
      • Vars
        • K(g);N_SPINS(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(g);N_SPINR(c),N_SPINS(f),S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(g);N_SPINR(c),N_SPINS(f),S_FLIGHT::S(I)
      • Refutation
        • K(g);N_SPINR(c),N_SPINS(f),S_FLIGHT
    • Try
      • S(I);CHECK
      • Vars
        • K(g);N_SPINS(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(g);N_SPINR(c),N_SPINS(f),S_FLIGHT
    • Try
      • Q(G);CHECK,XS(f)
      • Vars
        • K(g);N_SPINR(c),S_FLIGHT::QAB(G)
      • Refutation
        • B(a);XQ(G)
    • Try
      • P(H);CHECK
      • Vars
        • K(g);N_SPINS(f),OGATE,S_FLIGHT::P(E)
      • Refutation
        • K(g);N_SPINR(c),N_SPINS(f),S_FLIGHT,XB(H)
  • Actual
    • R(F);N_PINR(c)
    • Threat
      • P=Q
    • Vars
      • K(g);N_SPINS(f),S_FLIGHT::R(F)+P(E),XS(f)
      • K(g);N_SPINS(f),P_SPINR(c),S_FLIGHT,XR(F)::S(B)
      • K(g);N_SPINS(f),OGATE,S_FLIGHT::P(E)
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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).