MESON Chess Problem Database

Problem Display
PID: 227853 (8/4p3/4R3/1pk5/3p4/1Q1K4/8/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1926

8/4p3/4R3/1pk5/3p4/1Q1K4/8/8

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Qa2?
      • 1...b4
        • 2.Qc4#
        • 2.Qa5#
      • 1...Kb4!
    • 1.Qc2+?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kb4!
    • 1.Qa3+?
      • 1...b4
        • 2.Qa5#
      • 1...Kd5!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qc6#
      • 1...dxc3!
  • Keys
    • 1.Ke4!
      • 1...b4
        • 2.Qd5#
      • 1...d3
        • 2.Qc3#

FEATURES

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