MESON Chess Problem Database

Problem Display
PID: 12088 (2B5/8/8/4Nn1n/7k/8/5K2/2Q5 w - - 0 1)

Kotlyar, Valery

Shakhmaty v SSSR, 1974

2B5/8/8/4Nn1n/7k/8/5K2/2Q5

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Sets
    • 1...Kh3
      • 2.Qh1#
    • 1...Se3
      • 2.Sf3#
    • 1...Sfg3
      • 2.Sf3#
      • 2.Sg6#
    • 1...Sd4
      • 2.Sg6#
    • 1...Sd6
      • 2.Sf3#
      • 2.Sg6#
    • 1...Sh6
      • 2.Sf3#
      • 2.Sg6#
    • 1...Se7
      • 2.Sf3#
    • 1...Sfg7
      • 2.Sf3#
      • 2.Sg6#
  • Tries
    • 1.Sf3+?
      • 1...Kh3
        • 2.Bxf5#
      • 1...Kg4!
    • 1.Qf4+?
      • 1...Kh3
        • 2.Bxf5#
      • 1...Sxf4!
    • 1.Qg5+?
      • 1...Kh3
        • 2.Qxh5#
      • 1...Kxg5!
  • Keys
    • 1.Qh6!
      • 1...Kh3
        • 2.Qxh5#
      • 1...Sxh6
        • 2.Sf3#
      • 1...Se3
        • 2.Sf3#
        • 2.Sg6#
      • 1...Sg3
        • 2.Sf3#
        • 2.Sg6#
      • 1...Sd4
        • 2.Sg6#
      • 1...Sd6
        • 2.Sf3#
        • 2.Sg6#
      • 1...Se7
        • 2.Sf3#
      • 1...Sg7
        • 2.Sf3#
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT,P_SPINS(b)::QAR2(A)
    • S(b);::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::B(D),XS(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::B(D),XS(b)
      • Refutation
        • S(c);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR2(A),XS(c)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);P_PINS(c)
    • Vars
      • K(a);N_SPINS(c),P-FLIGHT,P_SPINS(b)::QAR2(A),XS(c)
      • S(b);N_SPINS(c),XQ(A)::S(C)
      • S(b);::S(C)
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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).