MESON Chess Problem Database

Problem Display
PID: 270478 (7Q/4PK1B/4P1P1/2p5/1pP5/kN6/p7/N7 w - - 0 1)

Kovacs, Florian Janos

Die Schwalbe, 1931

7Q/4PK1B/4P1P1/2p5/1pP5/kN6/p7/N7

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa8#
  • Tries
    • 1.Kf6?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kb2!
    • 1.Kg7?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kb2!
    • 1.Sc1?
      • 1...Ka4
        • 2.Qa8#
      • 1...b3!
    • 1.Sd2?
      • 1...Ka4
        • 2.Qa8#
      • 1...b3!
    • 1.Qb2+?
      • 1...Ka4
        • 2.Qxa2#
        • 2.e8Q#
        • 2.e8B#
      • 1...Kxb2!
    • 1.Qb8?
      • 1...Ka4
        • 2.Qa7#
        • 2.Qa8#
      • 1...Kb2!
    • 1.Qc8?
      • 1...Ka4
        • 2.Qa6#
        • 2.Qa8#
      • 1...Kb2!
    • 1.Qd8?
      • 1...Ka4
        • 2.Qa5#
        • 2.Qa8#
      • 1...Kb2!
    • 1.Qf8?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kb2!
    • 1.Qg8?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kb2!
    • 1.g7?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kb2!
  • Keys
    • 1.e8R!
      • 1...Ka4
        • 2.Ra8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,P-FLIGHT::QAR(I)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • P(c);
    • Try
      • S(B);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • P(c);
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(I)
    • Try
      • Q(I);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(I);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(I);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(I);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(I);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(E);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR(I)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • P(F);
    • Vars
      • K(b);P-FLIGHT::R(F)
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).