MESON Chess Problem Database

Problem Display
PID: 104423 (Q1n1r2n/1R6/5P2/3R4/2N2p1p/3P1kBP/r3N3/3B2K1 w - - 0 1)

Mladenovic, Slobodan

Front Ty., 1969

Q1n1r2n/1R6/5P2/3R4/2N2p1p/3P1kBP/r3N3/3B2K1

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...fxg3
      • 2.Rf5#
    • 1...hxg3
      • 2.Sd4#
  • Tries
    • 1.Sd2+?
      • 1...Ke3
        • 2.Bxf4#
      • 1...Rxd2!
    • 1.Se5+?
      • 1...Ke3
        • 2.Bxf4#
      • 1...Rxe5!
    • 1.Bf2?
      • threat
        • 2.Sd4#
      • 1...Raxe2
        • 2.Sd2#
      • 1...Rexe2
        • 2.Se5#
      • 1...Rg8+!
    • 1.Rg7?
      • threat
        • 2.Sd4#
      • 1...Raxe2
        • 2.Re5#
      • 1...Rexe2
        • 2.Ra5#
      • 1...fxg3
        • 2.Rf5#
      • 1...Sg6!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Sd4#
      • 1...Raxe2
        • 2.Re7#
      • 1...Rexe2
        • 2.Ra7#
      • 1...fxg3
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATEB,XB(E)::R(H)
    • P(d);SBLOCK,XB(E)::B(A)+S(C),DCHECK
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P-FLIGHT::B(E),XP(c)
      • Refutation
        • R(a);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P-FLIGHT::B(E),XP(c)
      • Refutation
        • R(f);XS(G)
    • Try
      • B(E);
      • Threat
        • B(A)+S(C),DCHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::S(G)
        • R(f);N_GUARD,P_SPINR(f),XS(C)::S(G)
      • Refutation
        • R(f);CHECK
    • Try
      • R(J);
      • Threat
        • B(A)+S(C),DCHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::QAB(K)+R(H)
        • R(f);N_GUARD,P_SPINR(f),XS(C)::QAB(K)+R(H)
        • P(c);XB(E)::QAB(K)+R(H),DCHECK
      • Refutation
        • S(g);
  • Actual
    • R(H);
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • R(a);N_GUARD,P_SPINR(a),XS(C)::QAB(K)+R(J)
      • R(f);N_GUARD,P_SPINR(f),XS(C)::QAB(K)+R(J)
      • P(c);OGATEB,XB(E)::R(H)
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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).