MESON Chess Problem Database

Problem Display
PID: 11736 (r3k3/n2N4/7K/3Q4/8/7B/8/8 w q - 0 1)

Pustovoi, Boris

Omskaya Pravda, 1971

r3k3/n2N4/7K/3Q4/8/7B/8/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Qe6#
  • Tries
    • 1.Qe4+?
      • 1...Kf7
        • 2.Qe6#
      • 1...Kd8!
    • 1.Qxa8+?
      • 1...Ke7
        • 2.Qf8#
      • 1...Kf7
        • 2.Qf8#
      • 1...Sc8!
    • 1.Qe5+?
      • 1...Kf7
        • 2.Qe6#
      • 1...Kd8!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf8#
      • 1...Kf7
        • 2.Qe6#
      • 1...Kd8
        • 2.Sf6#
      • 1...0-0-0
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK,XR(b)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(B)
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • K(c);P-FLIGHT::QAR(B)+S(D)
      • K(c);0-0-0::QAR1(B)
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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).