MESON Chess Problem Database

Problem Display
PID: 241829 (8/4Kp2/5P2/4k3/4p2R/8/8/3Q4 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1930

8/4Kp2/5P2/4k3/4p2R/8/8/3Q4

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qh5#
    • 1...e3
      • 2.Qh5#
  • Tries
    • 1.Kxf7?
      • 1...Kf5
        • 2.Qh5#
        • 2.Qd5#
      • 1...e3!
    • 1.Rxe4+?
      • 1...Kf5
        • 2.Qg4#
      • 1...Kxe4!
    • 1.Qa4?
      • threat
        • 2.Qxe4#
      • 1...Kd5
        • 2.Rh5#
      • 1...e3
        • 2.Rh5#
        • 2.Qb5#
        • 2.Qe4#
        • 2.Qa5#
      • 1...Kf5!
    • 1.Qd2?
      • threat
        • 2.Rh5#
      • 1...e3
        • 2.Qa5#
      • 1...Kf5!
    • 1.Qd8?
      • 1...e3
        • 2.Qa5#
      • 1...Kf5!
  • Keys
    • 1.Qd7!
      • 1...e3
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
    • P(a);::QAR(A)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(c)
      • Refutation
        • P(a);
    • Try
      • R(B);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT::R(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • R(B)
      • Vars
        • P(a);::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • P(a);::QAR(A)
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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).