MESON Chess Problem Database

Problem Display
PID: 192592 (3QK1N1/p4N2/4pP1p/r4k1P/1bp3nr/5Pn1/5p1p/2B4b w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2019

3QK1N1/p4N2/4pP1p/r4k1P/1bp3nr/5Pn1/5p1p/2B4b

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Sfxh6#
      • 2.Sgxh6#
    • 1...Sxf6+
      • 2.Qxf6#
    • 1...e5
      • 2.Qd7#
      • 2.Qc8#
  • Tries
    • 1.Qd3+?
      • 1...Se4
        • 2.Qxe4#
      • 1...cxd3!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qf4#
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Rxh5
        • 2.Qxg4#
      • 1...Sxh5
        • 2.Qe4#
      • 1...e5
        • 2.Qd7#
      • 1...Bd2
        • 2.Se7#
      • 1...Bd6
        • 2.Sxd6#
      • 1...Se2
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Se3
        • 2.Sgxh6#
      • 1...Se5
        • 2.Sfxh6#

This is a version of 139359

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(g);CHECK,OGATE,XP(D)::QAR1(F),XS(g)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(F),XS(d)
      • Refutation
        • P(f);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • S(g);CHECK,OGATE,XP(D)::QAR1(F),XS(g)
      • R(h);N_GUARD,XP(C)::QAB1(F),XS(g)
      • S(d);N_GUARD,XP(C)::QAB1(F)
      • P(k);OGATEB::QAB(F)
      • B(e);N_GUARD::S(H)
      • B(e);N_GUARD::S(E),XB(e)
      • S(d);N_GUARD::QAB1(F)
      • S(d);N_GUARD::QAB1(F),XS(d)
      • S(g);N_GUARD::S(H),XP(l)
      • S(g);N_GUARD::S(E),XP(l)
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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).