MESON Chess Problem Database

Problem Display
PID: 223597 (B6B/K2Q2q1/1P5b/3n4/1P1k1P2/1bppNRN1/5P2/8 w - - 0 1)

Sardella, Giuseppe

Best Problems, 2020

B6B/K2Q2q1/1P5b/3n4/1P1k1P2/1bppNRN1/5P2/8

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Bxe5#
    • 1...Qf6
      • 2.Bxf6#
    • 1...Bc4
      • 2.Sef5#
  • Tries
    • 1.Qxg7+?
      • 1...Sf6
        • 2.Sgf5#
        • 2.Qxf6#
      • 1...Bxg7!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Sef5#
      • 1...Sxe3
        • 2.fxe3#
      • 1...Sxc7
        • 2.Sgf5#
      • 1...Se7
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_PINQ(I),OGATE::B(K),XQ(g)
    • B(a);SBLOCK::S(B)
  • Tries
    • Try
      • Q(I);CHECK,N_PINS(e),N_SPINQ(I),XQ(g)
      • Refutation
        • B(f);P_SPINB(f),XQ(I)
  • Actual
    • Q(I);N_PINS(e)
    • Threat
      • S(B)
    • Vars
      • S(e);OGATE,XS(B)::P(A),XS(e)
      • S(e);XQ(I)::S(D)
      • S(e);N_PINQ(I)::QAB1(I)
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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).