MESON Chess Problem Database

Problem Display
PID: 263908 (3n3n/5k2/1Q5K/5P2/1B6/8/8/8 w - - 0 1)

Grassano, Carlos A

Coello-75 JT (Problemas), 2017

3n3n/5k2/1Q5K/5P2/1B6/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
    • 1...Sg6
      • 2.Qxg6#
  • Tries
    • 1.Qc7+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Kg8
        • 2.Qg7#
        • 2.Qh7#
      • 1...Kf6!
    • 1.Qc6?
      • 1...Kg8
        • 2.Qe8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sb7
        • 2.Qe6#
      • 1...Sxc6!
    • 1.Qf6+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Kg8
        • 2.Qg7#
        • 2.Qf8#
      • 1...Kxf6!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf8#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kg8
        • 2.Qf8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::QAB1(C),XS(b)
    • S(b);N_GUARD::QAB1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(b);N_GUARD::QAB1(C)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • S(b);N_GUARD::QAB1(C),XS(b)
      • S(c);N_GUARD::QAB1(C),XS(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).