MESON Chess Problem Database

Problem Display
PID: 235471 (1Q4b1/5n1p/r2p4/n1R5/1N2kp2/2K1N3/3PPrPB/8 w - - 0 1)

Shanshin, Valery Yurevich

Schach, 2018

1Q4b1/5n1p/r2p4/n1R5/1N2kp2/2K1N3/3PPrPB/8

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.exf3#
      • 2.gxf3#
    • 1...fxe3
      • 2.d3#
  • Tries
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...fxe3
        • 2.d3#
      • 1...Sh6!
  • Keys
    • 1.Sbd5!
      • threat
        • 2.Sf6#
      • 1...Ke5
        • 2.Qe8#
      • 1...fxe3
        • 2.Qb1#
      • 1...dxc5
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK,XS(F)::P(A)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • P(c);SBLOCK,XS(F)::P(A)
      • Refutation
        • S(g);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::QAR(I)
      • P(c);XS(F)::QAB(I)
      • P(f);XR(H)::P(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).