MESON Chess Problem Database

Problem Display
PID: 172214 (5K2/6P1/6kn/4R3/5P2/8/8/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

5K2/6P1/6kn/4R3/5P2/8/8/4Q3

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rg5+?
      • 1...Kf6
        • 2.Qe5#
        • 2.Qe7#
      • 1...Kh7!
    • 1.Qb1+?
      • 1...Kf6
        • 2.Qb6#
      • 1...Sf5!
    • 1.Qe4+?
      • 1...Kf6
        • 2.Re6#
        • 2.Qc6#
      • 1...Sf5!
    • 1.g8Q+?
      • 1...Kf6
        • 2.Qh4#
        • 2.Qe6#
        • 2.Qg5#
        • 2.Qg7#
      • 1...Sxg8!
  • Keys
    • 1.Qh4!
      • 1...Kh7
        • 2.g8Q#
      • 1...Sg4
        • 2.f5#
        • 2.g8Q#
        • 2.g8R#
      • 1...Sf5
        • 2.Re6#
      • 1...Sf7
        • 2.f5#
        • 2.g8Q#
        • 2.g8R#
      • 1...Sg8
        • 2.f5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • P(D);CHECK
      • Refutation
        • S(b);XQ(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::P=Q
      • S(b);SBLOCK::R(C)
      • S(b);N_GUARD::P(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).