MESON Chess Problem Database

Problem Display
PID: 241960 (4K3/8/3pk3/4p2R/8/8/3Q4/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

4K3/8/3pk3/4p2R/8/8/3Q4/8

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qh6#
    • 1...e4
      • 2.Qh6#
    • 1...d5
      • 2.Qh6#
  • Tries
    • 1.Qc1?
      • 1...Kf6
        • 2.Qh6#
      • 1...e4
        • 2.Qh6#
      • 1...d5
        • 2.Qh6#
        • 2.Qc6#
      • 1...Kd5!
    • 1.Qe3?
      • 1...Kf6
        • 2.Qh6#
      • 1...e4
        • 2.Qh6#
      • 1...d5
        • 2.Qb6#
        • 2.Qh6#
        • 2.Qxe5#
      • 1...Kd5!
    • 1.Qa5?
      • 1...d5
        • 2.Qb6#
        • 2.Qa6#
      • 1...e4
        • 2.Rh6#
        • 2.Qf5#
      • 1...Kf6!
    • 1.Qg5?
      • 1...e4
        • 2.Rh6#
        • 2.Qh6#
        • 2.Qe7#
        • 2.Qf5#
        • 2.Qg6#
      • 1...d5
        • 2.Rh6#
        • 2.Qh6#
        • 2.Qe7#
        • 2.Qxe5#
        • 2.Qg6#
      • 1...Kd5!
    • 1.Qf2?
      • threat
        • 2.Qf7#
      • 1...d5
        • 2.Rh6#
        • 2.Qb6#
      • 1...Kd5!
    • 1.Qg2?
      • 1...d5
        • 2.Qg6#
      • 1...e4
        • 2.Qg6#
      • 1...Kf6!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Kxd5!
  • Keys
    • 1.Qa2+!
      • 1...Kf6
        • 2.Qf7#
      • 1...d5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
    • P(a);::QAR(A)
    • P(b);SBLOCK::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • P(a);::QAR(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(c);N_SPINP(a),P-FLIGHT::QAR2(A)
        • P(a);::QAR(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR2(A)
        • P(a);::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);OGATE,P-FLIGHT::QAR1(A)
      • P(b);OGATEB,P_SPINP(b),SBLOCK::QAR(A)
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).