MESON Chess Problem Database

Problem Display
PID: 281426 (8/4Q3/4b3/4k3/4N3/4K3/8/8 w - - 0 1)

Schiffert, Gyorgy

Sp. Prize, Buletin Problemistic TT, 1985

8/4Q3/4b3/4k3/4N3/4K3/8/8

#2

3 + 2

15601 Albrecht-Leiss-Degener Collection 2025
5454 Near Snap 2025
3713 Snap 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc5#
    • 1...Kf5
      • 2.Qg5#
  • Tries
    • 1.Kd3?
      • 1...Kd5
        • 2.Qc5#
        • 2.Qd6#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf4!
    • 1.Kf3?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kf5
        • 2.Qg5#
        • 2.Qf6#
      • 1...Kd4!
    • 1.Qc7+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Sf6#
        • 2.Qc5#
      • 1...Kf5!
    • 1.Qg7+?
      • 1...Kf5
        • 2.Sg3#
        • 2.Sd6#
        • 2.Qg5#
      • 1...Kd5!
  • Keys
    • 1.Qe8!
      • 1...Kd5
        • 2.Qb5#
      • 1...Kf5
        • 2.Qh5#

Anticipated by 2709(0000), 263955(1935)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR1(C)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR1(C)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINB(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK,N_PINB(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR2(C)
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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).