MESON Chess Problem Database

Problem Display
PID: 15488 (1QK5/2n1pR2/5N1p/b1P1k3/1pp1PN2/4P3/7n/6Rb w - - 0 1)

Wielgos, Oskar

2nd Place, Schach-Aktiv, 1984

1QK5/2n1pR2/5N1p/b1P1k3/1pp1PN2/4P3/7n/6Rb

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Sd7#
    • 1...h5
      • 2.Rg5#
    • 1...exf6
      • 2.Re7#
    • 1...e6
      • 2.Sg6#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Sg6#
      • 1...exf6
        • 2.Re7#
      • 1...Bxe4!
    • 1.Rg6?
      • threat
        • 2.Rxe7#
      • 1...Bxe4
        • 2.Sd7#
      • 1...exf6
        • 2.Re7#
      • 1...e6!
    • 1.Qb7?
      • threat
        • 2.Sd7#
      • 1...Sd5
        • 2.Qxd5#
      • 1...exf6!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Rd5#
      • 1...Bxe4
        • 2.Sd7#
      • 1...exf6
        • 2.Re7#
      • 1...e6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK,XP(C)::S(F)
    • P(g);N_GUARD::R(A)
    • P(i);SBLOCK,XS(F)::R(G)
    • P(i);SBLOCK::S(D)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • S(D)
      • Vars
        • P(i);SBLOCK,XS(F)::R(G)
      • Refutation
        • B(a);XP(C)
    • Try
      • R(A);
      • Threat
        • R(G),XP(i)
      • Vars
        • B(a);SBLOCK,XP(C)::S(F)
        • P(i);XS(F)::R(G)
      • Refutation
        • P(i);
    • Try
      • Q(H);N_PINS(h)
      • Threat
        • S(F)
      • Vars
        • S(h);N_GUARD::QAR1(H),XS(h)
      • Refutation
        • P(i);XS(F)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • B(a);SBLOCK,XP(C)::S(F)
      • P(i);SBLOCK,XS(F)::R(G)
      • P(i);SBLOCK::S(D)
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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).