MESON Chess Problem Database

Problem Display
PID: 22148 (3R4/8/4Nk2/4N3/8/4K2Q/8/8 w - - 0 1)

Mostert, Joop

Probleemblad, 1960

3R4/8/4Nk2/4N3/8/4K2Q/8/8

#2

5 + 1

3713 Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc6?
      • 1...Kf7
        • 2.Qf5#
      • 1...Kg6!
    • 1.Sg6?
      • 1...Kf7
        • 2.Qf5#
      • 1...Kxg6!
    • 1.Sd4?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qh8#
      • 1...Ke7
        • 2.Qh4#
      • 1...Kg7
        • 2.Qh8#
      • 1...Kg5!
    • 1.Sf4?
      • 1...Kxe5
        • 2.Qe6#
      • 1...Ke7
        • 2.Qh4#
      • 1...Kg7
        • 2.Qh8#
      • 1...Kg5!
    • 1.Sc7?
      • 1...Kxe5
        • 2.Qe6#
      • 1...Ke7
        • 2.Qh4#
      • 1...Kg7
        • 2.Qh8#
      • 1...Kg5!
    • 1.Sg7?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qe6#
      • 1...Ke7
        • 2.Qh4#
      • 1...Kxg7
        • 2.Qh8#
      • 1...Kg5!
    • 1.Sf8?
      • 1...Kxe5
        • 2.Qe6#
      • 1...Kg5
        • 2.Sh7#
      • 1...Ke7
        • 2.Qh4#
      • 1...Kg7!
    • 1.Qf5+?
      • 1...Ke7
        • 2.Sc6#
        • 2.Sg6#
        • 2.Qf7#
      • 1...Kxf5!
    • 1.Qh5?
      • 1...Ke7
        • 2.Qf7#
      • 1...Kxe6!
  • Keys
    • 1.Sc5!
      • 1...Kxe5
        • 2.Qe6#
      • 1...Kg5
        • 2.Se4#
      • 1...Ke7
        • 2.Qh4#
      • 1...Kg7
        • 2.Qh8#

This anticipates 171432(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAB(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(B)
        • K(a);S_FLIGHT::QAB(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(B)
        • K(a);S_FLIGHT::QAB(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAB(B)
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(B)
        • K(a);S_FLIGHT::S(D)
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR1(B)
      • K(a);S_FLIGHT::S(D)
      • K(a);S_FLIGHT::QAB(B)
      • K(a);S_FLIGHT::QAB1(B)
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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).