MESON Chess Problem Database

Problem Display
PID: 172345 (8/8/7P/5p1b/5QNk/8/6K1/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/8/7P/5p1b/5QNk/8/6K1/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Sf6#
    • 1...Bf7
      • 2.Sf6#
    • 1...Be8
      • 2.Sf6#
    • 1...fxg4
      • 2.Qf6#
  • Tries
    • 1.Kh2?
      • 1...fxg4
        • 2.Qf6#
      • 1...Bg6
        • 2.Sf6#
      • 1...Bf7
        • 2.Sf6#
      • 1...Be8
        • 2.Sf6#
      • 1...Bxg4!
    • 1.Qh2+?
      • 1...Kxg4
        • 2.Qg3#
      • 1...Kg5!
    • 1.Qf2+?
      • 1...Kxg4
        • 2.Qg3#
      • 1...Kg5!
  • Keys
    • 1.h7!
      • 1...Bxg4
        • 2.h8Q#
        • 2.h8R#
      • 1...fxg4
        • 2.Qf6#
      • 1...Bg6
        • 2.Sf6#
      • 1...Bf7
        • 2.Sf6#
      • 1...Be8
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::QAR(B)+S(C)
    • P(b);OGATE,P_SPINP(b),SBLOCK,XS(C)::QAB(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);OGATE,P_SPINP(b),SBLOCK,XS(C)::QAB(B)
        • B(c);N_GUARD::QAR(B)+S(C)
      • Refutation
        • B(c);P_SPINB(c),XS(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(D);
    • Vars
      • B(c);P_SPINB(c),XS(C)::P=Q
      • P(b);OGATE,P_SPINP(b),SBLOCK,XS(C)::QAB(B)
      • B(c);N_GUARD::QAR(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).