MESON Chess Problem Database

Problem Display
PID: 66799 (n7/2p5/2P2R1B/1p6/1N1knP2/p2P4/5p2/K1Q5 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Udartsev, Valentin Filipovich

4th Prize, St. Petersburg, 1994

n7/2p5/2P2R1B/1p6/1N1knP2/p2P4/5p2/K1Q5

#2

8 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Rf5?
      • threat
        • 2.Rd5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sc3
        • 2.Bg7#
      • 1...Sf6
        • 2.Qc5#
      • 1...Sb6!
    • 1.Rd6+?
      • 1...Sxd6
        • 2.Bg7#
      • 1...cxd6!
    • 1.Re6?
      • threat
        • 2.Rxe4#
      • 1...Sc3
        • 2.Qe3#
      • 1...Sd2
        • 2.Bg7#
      • 1...Sg3
        • 2.Bg7#
      • 1...Sc5
        • 2.Bg7#
      • 1...Sg5
        • 2.Bg7#
      • 1...Sd6
        • 2.Bg7#
      • 1...Sf6!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Rd6#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Sd2
        • 2.Re6#
      • 1...Sc3
        • 2.Rf5#
      • 1...Sd6
        • 2.Rf5#
        • 2.Rxd6#
        • 2.Re6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Rf7#
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • S(d);N_GUARD::QAB1(B)
        • S(d);N_GUARD::B(H)
      • Refutation
        • S(g);
    • Try
      • R(G);CHECK
      • Vars
        • S(d);XR(G)::B(H)
      • Refutation
        • P(f);XR(G)
    • Try
      • R(G);
      • Threat
        • R1(G),XS(d)
      • Vars
        • S(d);SBLOCK::QAB1(B)
        • S(d);N_GUARD::B(H)
      • Refutation
        • S(d);
  • Actual
    • B(H);
    • Threat
      • B(H)+R(G),DCHECK
    • Vars
      • S(d);OGATE,P_SPINS(d),XR(G)::B(H),XS(d)
      • S(d);N_GUARD::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).