MESON Chess Problem Database

Problem Display
PID: 195021 (n7/R6Q/qk5P/p1pKB1p1/P1p5/5p1r/8/8 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1918

n7/R6Q/qk5P/p1pKB1p1/P1p5/5p1r/8/8

#2

6 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qb7#
    • 1...Qb7+
      • 2.Qxb7#
    • 1...Sc7+
      • 2.Qxc7#
  • Tries
    • 1.Bc7+?
      • 1...Sxc7+
        • 2.Qxc7#
      • 1...Kxa7!
    • 1.Qb1+?
      • 1...Kxa7
        • 2.Bb8#
        • 2.Qb8#
      • 1...Qb5!
  • Keys
    • 1.Bb8!
      • threat
        • 2.Qg6#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Qxa7
        • 2.Qxa7#
      • 1...Rxh6
        • 2.Qxh6#
      • 1...Qb5
        • 2.Qb7#
      • 1...Qc8
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_GUARD::QAR1(F)
    • Q(g);CHECK,N_GUARD::QAR1(F),XQ(g)
    • S(i);CHECK,N_GUARD::QAB1(F),XS(i)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • S(i);CHECK,OGATE,XB(C)::QAB1(F),XS(i)
      • Refutation
        • K(h);S_FLIGHT,XR(E)
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • B(C);
    • Threat
      • QAR(F)
    • Vars
      • Q(g);CHECK,N_GUARD::QAR1(F),XQ(g)
      • S(i);CHECK,N_GUARD::QAB1(F),XS(i)
      • Q(g);OGATE,XR(E)::QAB1(F),XQ(g)
      • R(b);OGATE,XP(D)::QAR(F),XR(b)
      • Q(g);N_GUARD::QAR1(F)
      • Q(g);N_GUARD::QAR(F)
HTML5 logo

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).