MESON Chess Problem Database

Problem Display
PID: 261358 (3b4/8/2b1N2Q/r5p1/1RB1n1kN/3p1R2/5nK1/8 w - - 0 1)

Binder, Friedrich

Neue Zurcher Zeitung, 1989

3b4/8/2b1N2Q/r5p1/1RB1n1kN/3p1R2/5nK1/8

#2

7 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...gxh4
      • 2.Rf4#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Qh5#
      • 1...gxh4
        • 2.Rf4#
        • 2.Qf4#
      • 1...Sg3
        • 2.Be6#
      • 1...Sf6
        • 2.Be6#
      • 1...Be8!
    • 1.Bb5?
      • threat
        • 2.Rg3#
      • 1...gxh4
        • 2.Rf4#
      • 1...Bc7
        • 2.Qxg5#
      • 1...Sh1!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Rg3#
      • 1...gxh4
        • 2.Rf4#
      • 1...Bc7
        • 2.Qxg5#
      • 1...Sh1
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(f);N_GUARD,XS(E)::R1(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(G)
      • Vars
        • S(c);P_PINR(B)::R(C)+B(D),DCHECK
      • Refutation
        • B(g);
    • Try
      • B(D);P_PINS(c)
      • Threat
        • R1(B)
      • Vars
        • P(f);N_GUARD,XS(E)::R1(B)
        • B(h);N_GUARD::QAR1(G),XP(f)
      • Refutation
        • S(a);
  • Actual
    • B(D);P_PINS(c)
    • Threat
      • R1(B)
    • Vars
      • P(f);N_GUARD,XS(E)::R1(B)
      • B(h);N_GUARD::QAR1(G),XP(f)
      • S(a);N_GUARD::R(C),XS(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).