MESON Chess Problem Database

Problem Display
PID: 122939 (6n1/5RPB/1R3N1k/8/5P1b/8/3Q2K1/8 w - - 0 1)

von Wardener, Friedrich Freiherr

La Strategie, 1900

6n1/5RPB/1R3N1k/8/5P1b/8/3Q2K1/8

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.fxg5#
  • Tries
    • 1.Sg4+?
      • 1...Kxh7
        • 2.Qc2#
        • 2.Qd3#
      • 1...Kh5!
    • 1.Sxg8+?
      • 1...Kh5
        • 2.Qd1#
        • 2.Qe2#
      • 1...Kxh7!
    • 1.Qa5?
      • threat
        • 2.Qh5#
      • 1...Sxf6
        • 2.g8S#
      • 1...Bg5
        • 2.Qxg5#
        • 2.fxg5#
      • 1...Bxf6!
    • 1.Qe2?
      • threat
        • 2.Qh5#
      • 1...Sxf6
        • 2.g8S#
      • 1...Bxf6!
    • 1.Qd5?
      • threat
        • 2.Qh5#
      • 1...Sxf6
        • 2.g8S#
      • 1...Bg5
        • 2.Qxg5#
        • 2.fxg5#
      • 1...Bxf6!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qh5#
      • 1...Bxf6
        • 2.Qh1#
      • 1...Sxf6
        • 2.g8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE::P(C),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(E);CHECK,XS(c)
      • Refutation
        • K(b);P-FLIGHT,XB(H)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);OGATE,P_SPINS(c),XS(E)::P=S
      • Refutation
        • B(a);P_SPINB(a),XS(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);OGATE,P_SPINS(c),XS(E)::P=S
      • Refutation
        • B(a);P_SPINB(a),XS(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);OGATE,P_SPINS(c),XS(E)::P=S
      • Refutation
        • B(a);P_SPINB(a),XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);OGATEB,P_SPINB(a),XS(E)::QAR(A)
      • S(c);OGATE,P_SPINS(c),XS(E)::P=S
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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).