MESON Chess Problem Database

Problem Display
PID: 108704 (qQ2B3/1bp5/6r1/p7/Pk2N2R/2R1p3/1P6/1N4bK w - - 0 1)

Kozlov, Aleksandr Ivanovich

2nd Prize, Chigorin MT, 1949-1950

qQ2B3/1bp5/6r1/p7/Pk2N2R/2R1p3/1P6/1N4bK

#2

9 + 8

113 Shakhmaty v SSSR 1950
721 Variantim 1989
721 Variantim 1992
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Sg3#
    • 1...Rc6
      • 2.Sc5#
    • 1...c6
      • 2.Sg5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Rb3#
        • 2.Rc4#
      • 1...Rc6
        • 2.Sc5#
      • 1...c6
        • 2.Sg5#
        • 2.Rc4#
      • 1...Qa6
        • 2.Rb3#
      • 1...exd2!
    • 1.Qxb7+?
      • 1...Rb6
        • 2.Sed2#
        • 2.Sf2#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sd6#
        • 2.Sf6#
      • 1...Qxb7!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sc2#
      • 1...Rc6
        • 2.Sc5#
      • 1...c6
        • 2.Sg5#
      • 1...Rg2
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(e);N_PINS(F)::R(G)+S(F)
    • P(g);N_PINS(F)::R(G)+S(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_PINS(F)::R(G)+S(F)
        • Q(h);::R1(D)
      • Refutation
        • P(b);XS(A)
    • Try
      • Q(H);CHECK,N_SPINS(F),XB(f)
      • Refutation
        • Q(h);P_PINS(F),XQ(H)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • R(e);N_PINS(F)::R(G)+S(F)
      • P(g);N_PINS(F)::R(G)+S(F)
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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).