MESON Chess Problem Database

Problem Display
PID: 193654 (1Q6/3kN2R/2p2P2/6PK/7p/5p2/8/4q3 w - - 0 1)

Feldbrand, Mark

Pesti Naplo, 1915

1Q6/3kN2R/2p2P2/6PK/7p/5p2/8/4q3

#2

6 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe7
      • 2.Rxe7#
  • Tries
    • 1.Sd5+?
      • 1...Qe7
        • 2.Rxe7#
      • 1...Ke6!
    • 1.Sf5+?
      • 1...Qe7
        • 2.Rxe7#
      • 1...Ke6!
    • 1.Sg6+?
      • 1...Qe7
        • 2.Sf8#
        • 2.Rxe7#
      • 1...Ke6!
    • 1.Sg8+?
      • 1...Qe7
        • 2.Rxe7#
      • 1...Ke6!
  • Keys
    • 1.f7!
      • threat
        • 2.f8S#
      • 1...Ke6
        • 2.f8S#
      • 1...Kxe7
        • 2.f8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATE,P_SPINQ(a),XS(D)::R1(E),XQ(a)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::R1(E),XQ(a)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::R1(E),XQ(a)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::R1(E),XQ(a)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • P(C);
    • Threat
      • P=S
    • Vars
      • K(e);S_FLIGHT::P=S
      • K(e);P-FLIGHT,XS(D)::P=S
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).