MESON Chess Problem Database

Problem Display
PID: 65842 (BQ5b/7b/2R5/4n3/5pP1/2N1pkNK/1p1P2Rn/1q6 w - - 0 1)

Kozdon, Baldur

3rd HM., Grunenwald/Monreal JT (diagrammes), 1978

BQ5b/7b/2R5/4n3/5pP1/2N1pkNK/1p1P2Rn/1q6

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Rg6#
    • 1...fxg3
      • 2.Rf6#
  • Tries
    • 1.Rg6+?
      • 1...Qe4
        • 2.Bxe4#
      • 1...Sc6!
  • Keys
    • 1.Sce2!
      • threat
        • 2.Sd4#
      • 1...Sexg4
        • 2.Qxf4#
      • 1...Sxc6
        • 2.Qxf4#
      • 1...exd2
        • 2.Rc3#
      • 1...fxg3
        • 2.Rf6#
      • 1...Qd3
        • 2.Sg1#
      • 1...Qe4
        • 2.Sg1#
      • 1...Sd3
        • 2.Rg6#
      • 1...Sc4
        • 2.Qxf4#
      • 1...Sg6
        • 2.Rc2#
      • 1...Sd7
        • 2.Qxf4#
      • 1...Sf7
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD,S_CUTQ(a)::B(H)+R(G)
    • P(f);XS(D)::B(H)+R(G),DCHECK
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(H),XQ(a)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • S(g);OGATE,XP(F)::QAR1(I),XP(f)
      • S(g);OGATE,P_SPINS(g),XR(G)::QAR1(I),XP(f)
      • P(d);XP(A)::B(H)+R(G),DCHECK
      • P(f);XS(D)::B(H)+R(G),DCHECK
      • Q(a);N_GUARD::S(C)
      • S(g);N_GUARD,S_CUTQ(a)::B(H)+R(G)
      • S(g);OGATE::QAR1(I),XP(f)
      • S(g);N_GUARD,S_CUTB(h)::B(H)+R(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).