MESON Chess Problem Database

Problem Display
PID: 238336 (8/4p3/4K3/8/8/2kP4/6N1/1Q1R4 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/4p3/4K3/8/8/2kP4/6N1/1Q1R4

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qb4#
  • Tries
    • 1.Rd2?
      • threat
        • 2.Qb2#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kxd2!
    • 1.Qa2?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kb4!
    • 1.Qb3+?
      • 1...Kd4
        • 2.Qc4#
        • 2.Qb4#
      • 1...Kxb3!
    • 1.Qb4+?
      • 1...Kc2
        • 2.Se3#
      • 1...Kxb4!
    • 1.Qb5?
      • 1...Kd4
        • 2.Qc4#
        • 2.Qb4#
        • 2.Qe5#
      • 1...Kc2!
    • 1.Qb7?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kc2!
    • 1.Qb8?
      • 1...Kd4
        • 2.Qe5#
        • 2.Qb4#
      • 1...Kc2!
  • Keys
    • 1.Rc1+!
      • 1...Kd2
        • 2.Qc2#
      • 1...Kd4
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(B);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);OGATE,S_FLIGHT::R1(B)
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).