MESON Chess Problem Database

Problem Display
PID: 108331 (3n4/1ppN4/3pR3/1p1k4/3P4/1K5Q/3R1p2/8 w - - 0 1)

Gold, Zsigmund

Checkmate, 1901

3n4/1ppN4/3pR3/1p1k4/3P4/1K5Q/3R1p2/8

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Sf6#
    • 1...Sxe6
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...c6
      • 2.Sb6#
      • 2.Sf6#
      • 2.Qf5#
  • Tries
    • 1.Re5+?
      • 1...Kc6
        • 2.Rc2#
        • 2.d5#
      • 1...dxe5!
    • 1.Qg4?
      • threat
        • 2.Qe4#
      • 1...Sxe6
        • 2.Qf3#
        • 2.Qg2#
      • 1...Kc6!
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Sxe6
        • 2.Qf3#
      • 1...Kc6!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qe4#
      • 1...Kc6
        • 2.d5#
      • 1...Kxe6
        • 2.d5#
      • 1...Sxe6
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(g);SBLOCK::S(F)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(g);SBLOCK,XR(E)::QAB(C)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);OGATE,P_SPINP(d),S_FLIGHT::P(D)
      • K(c);OGATE,S_FLIGHT,XR(E)::P(D)
      • S(g);SBLOCK,XR(E)::QAB(C)
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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).