MESON Chess Problem Database

Problem Display
PID: 66771 (4RB2/Q1p5/3r1n2/1PP1N1R1/1p1kn2K/1PN1p3/2ppP3/1b5B w - - 0 1)

Afek, Yochanan

Avner, Uri

1st Prize, Sarajevo, 1984

4RB2/Q1p5/3r1n2/1PP1N1R1/1p1kn2K/1PN1p3/2ppP3/1b5B

#2

12 + 10

15433 Seleccion de los mejores problemas Uri Avner 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3
      • 2.Sf3#
      • 2.c6#
    • 1...bxc3
      • 2.Sf3#
  • Tries
    • 1.Sa2?
      • threat
        • 2.Sf3#
      • 1...Kd5
        • 2.Sc6#
      • 1...Sxg5
        • 2.c6#
      • 1...Bxa2!
    • 1.Qa1?
      • threat
        • 2.Sf3#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Sxg5
        • 2.Sa4#
      • 1...Sd5!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sf3#
      • 1...Kd5
        • 2.Sc6#
      • 1...Sxg5
        • 2.c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(e);SBLOCK,XS(D)::S(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(H)
      • Vars
        • K(f);P-FLIGHT,P_SPINS(g)::R(I)+S(H)
        • S(g);N_GUARD,XR(I)::QAB(J)+P(G)
      • Refutation
        • B(a);XS(D)
    • Try
      • Q(J);
      • Threat
        • S(H)
      • Vars
        • K(f);OGATEB,P_SPINR(h),S_FLIGHT,XP(G)::QAB(J)
        • S(g);N_GUARD,XR(I)::QAB(J)+S(D)
      • Refutation
        • S(i);
  • Actual
    • S(D);
    • Threat
      • S(H)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(g)::R(I)+S(H)
      • S(g);N_GUARD,XR(I)::QAB(J)+P(G)
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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).