MESON Chess Problem Database

Problem Display
PID: 208177 (4kBb1/1p2P3/4n1P1/8/P7/K7/8/3Q4 w - - 0 1)

Munoz, JB

Dubuque Chess Journal, 1875

4kBb1/1p2P3/4n1P1/8/P7/K7/8/3Q4

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qd8#
    • 1...Sc5
      • 2.Qd8#
    • 1...Sg5
      • 2.Qd8#
    • 1...Sc7
      • 2.Qd8#
    • 1...Sg7
      • 2.Qd8#
    • 1...Sd8
      • 2.Qxd8#
      • 2.exd8Q#
      • 2.exd8R#
    • 1...Sxf8
      • 2.Qd8#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qb5#
      • 1...Sxf8
        • 2.Qd8#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sc7
        • 2.Qd8#
      • 1...Sd8
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...b5
        • 2.Qxb5#
      • 1...Sd4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qb5#
      • 1...Sxf8
        • 2.Qd8#
      • 1...Sd4
        • 2.Qd8#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sc7
        • 2.Qd8#
      • 1...Sd8
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...b5
        • 2.Qc6#
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD,XB(F)::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(a);N_GUARD,XB(F)::QAR1(A)
        • S(a);N_GUARD::QAR1(A)
        • P(b);::QAB(A),XP(b)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(a);N_GUARD,XB(F)::QAR1(A)
      • S(a);N_GUARD::QAR1(A)
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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).