MESON Chess Problem Database

Problem Display
PID: 231461 (8/8/8/8/8/5p2/3K1kN1/5B1Q w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1927

8/8/8/8/8/5p2/3K1kN1/5B1Q

#2

4 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kg3
      • 2.Qh4#
    • 1...fxg2
      • 2.Qxg2#
  • Tries
    • 1.Kc1?
      • 1...Kg3
        • 2.Qh4#
      • 1...fxg2!
    • 1.Kd1?
      • 1...Kg3
        • 2.Qh4#
      • 1...fxg2!
    • 1.Kc2?
      • 1...Kg3
        • 2.Qh4#
      • 1...fxg2!
    • 1.Kc3?
      • 1...Kg3
        • 2.Qh4#
      • 1...fxg2!
    • 1.Kd3?
      • 1...Kg3
        • 2.Qh4#
      • 1...fxg2!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Se3#
      • 1...Kxf1
        • 2.Se3#
      • 1...fxg2
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
    • P(b);OGATE,XS(D)::QAR1(B),XP(b)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);XS(D)
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);XS(D)
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);XS(D)
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);XS(D)
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);XS(D)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+S(D)
    • Vars
      • K(a);P-FLIGHT,XB(A)::S(D)
      • P(b);OGATE,P_SPINP(b),XS(D)::QAR1(B),XP(b)
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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).