MESON Chess Problem Database

Problem Display
PID: 232779 (4Bn1n/6p1/2pK1k2/5N1R/2Qp1pP1/5R2/1NprP1rb/B7 w - - 0 1)

Hoy, Paul

Freie Presse, 1975

4Bn1n/6p1/2pK1k2/5N1R/2Qp1pP1/5R2/1NprP1rb/B7

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qxe6#
    • 1...Sfg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
    • 1...Shg6
      • 2.Qf7#
    • 1...Sf7+
      • 2.Qxf7#
    • 1...d3
      • 2.Sd1#
      • 2.Sxd3#
      • 2.Sa4#
      • 2.Qc3#
      • 2.Qd4#
  • Tries
    • 1.Qg8?
      • threat
        • 2.Qxg7#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...Se6
        • 2.Qxe6#
      • 1...g5
        • 2.Qxg5#
        • 2.Qg7#
        • 2.Qxh8#
      • 1...g6
        • 2.Qg7#
        • 2.Qxh8#
      • 1...Rxg4!
  • Keys
    • 1.e4!
      • threat
        • 2.e5#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...dxe4 ep+
        • 2.Sd3#
      • 1...fxe4 ep+
        • 2.Sg3#
      • 1...Rde2
        • 2.Qxd4#
      • 1...Rge2
        • 2.g5#
      • 1...Sfg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Shg6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(j);N_GUARD::QAR1(E),XS(j)
    • S(j);N_GUARD::QAR1(E)
    • S(k);N_GUARD::QAR1(E)
    • S(k);CHECK,N_GUARD::QAR1(E),XS(k)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E),XP(i)
      • Vars
        • S(k);CHECK,N_GUARD::QAR1(E),XS(k)
        • S(j);N_GUARD::QAR1(E),XS(j)
      • Refutation
        • R(c);XP(F)
  • Actual
    • P(C);
    • Threat
      • P(C)
    • Vars
      • S(k);CHECK,N_GUARD::QAR1(E),XS(k)
      • P(e);CHECK,EP,XP(C)::B(A)+S(B)
      • P(f);CHECK,EP,XP(C)::R(D)+S(G)
      • R(b);N_GUARD::QAB(E),XP(e)
      • R(c);N_GUARD::P(F)
      • S(j);N_GUARD::QAR1(E)
      • S(k);N_GUARD::QAR1(E)
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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).