MESON Chess Problem Database

Problem Display
PID: 231471 (K2N4/QNk5/P1P5/8/8/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1927

K2N4/QNk5/P1P5/8/8/8/8/8

#2

6 + 1

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc8
      • 2.Qb8#
  • Tries
    • 1.Sa5+?
      • 1...Kc8
        • 2.Qb8#
        • 2.Qd7#
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kd6!
    • 1.Sc5+?
      • 1...Kc8
        • 2.Qb8#
        • 2.Qd7#
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kd6!
    • 1.Sd6+?
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kxd6!
    • 1.Se6+?
      • 1...Kc8
        • 2.Sd6#
        • 2.Qb8#
      • 1...Kxc6!
    • 1.Sf7?
      • 1...Kc8
        • 2.Sbd6#
        • 2.Qb8#
      • 1...Kxc6!
    • 1.Qb6+?
      • 1...Kc8
        • 2.Sd6#
      • 1...Kxb6!
  • Keys
    • 1.Qd4!
      • 1...Kc8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(F)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(F)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(F)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • S(F);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • S(F);
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAB1(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).