MESON Chess Problem Database

Problem Display
PID: 258334 (8/b7/2N2P1q/R1n2R1p/1pk5/1r4QK/B3P3/2n1BN2 w - - 0 1)

Gomez, Luis

Problemas, 2022

8/b7/2N2P1q/R1n2R1p/1pk5/1r4QK/B3P3/2n1BN2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qg7
      • 2.Sd2#
      • 2.Se3#
    • 1...Qf8
      • 2.Sd2#
      • 2.Se3#
    • 1...Qxf6
      • 2.Sd2#
      • 2.Se3#
    • 1...Qg6
      • 2.Sd2#
      • 2.Se3#
    • 1...Qh7
      • 2.Sd2#
      • 2.Se3#
    • 1...Qh8
      • 2.Sd2#
      • 2.Se3#
    • 1...Bb8
      • 2.Raxc5#
      • 2.Rfxc5#
    • 1...Sd3
      • 2.Qg8#
  • Tries
    • 1.Bxb3+?
      • 1...S5xb3
        • 2.Qg8#
      • 1...S1xb3!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sd2#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...S1d3
        • 2.Qd4#
      • 1...S5d3
        • 2.Qe6#
      • 1...Se4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(g);N_GUARD::S(B),XQ(g)
    • S(e);N_PINQ(E)::QAB(E)
  • Tries
    • Try
      • B(C);CHECK,N_SPINQ(E),XR(b)
      • Vars
        • S(e);SBLOCK,XB(C)::QAB(E)
      • Refutation
        • S(a);XB(C)
  • Actual
    • Q(E);
    • Threat
      • S(B)
    • Vars
      • Q(g);CHECK,XQ(E)::S(B),XQ(g)
      • S(a);N_PINQ(E)::QAR1(E)
      • S(e);N_PINQ(E)::QAB(E)
      • S(e);::S(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).