MESON Chess Problem Database

Problem Display
PID: 150448 (8/8/6p1/6Pp/4n2k/8/4N1Q1/4K3 w - - 0 1)

Dawson, Thomas Rayner

Pittsburgh Sun, 1925

(First published on Sat Oct 31 1925)

8/8/6p1/6Pp/4n2k/8/4N1Q1/4K3

#2

4 + 4

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qg3#
    • 1...Sf2
      • 2.Qg3#
    • 1...Sc3
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sc5
      • 2.Qg3#
    • 1...Sxg5
      • 2.Qg3#
    • 1...Sd6
      • 2.Qg3#
    • 1...Sf6
      • 2.Qg3#
  • Tries
    • 1.Kf1?
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Sxg5
        • 2.Qg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...Sc3
        • 2.Qg3#
      • 1...Sc5
        • 2.Qg3#
      • 1...Sd6
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sd2+!
    • 1.Qxe4+?
      • 1...Kxg5
        • 2.Qf4#
      • 1...Kh3!
    • 1.Qg1?
      • 1...Sxg5
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sd2
        • 2.Qg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...Sc3
        • 2.Qg3#
      • 1...Sc5
        • 2.Qg3#
      • 1...Sd6
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Kh3!
    • 1.Qh2+?
      • 1...Kxg5
        • 2.Qf4#
      • 1...Kg4!
  • Keys
    • 1.Qf3!
      • 1...Kxg5
        • 2.Qf4#
      • 1...Sxg5
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sd2
        • 2.Qg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...Sc3
        • 2.Qg3#
      • 1...Sc5
        • 2.Qg3#
      • 1...Sd6
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • S(a);N_GUARD,XP(D)::QAB1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD,XP(D)::QAB1(C)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(C);CHECK,XS(a)
      • Vars
        • K(b);S_FLIGHT,XP(D)::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD,XP(D)::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(D)::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT,XP(D)::QAB1(C)
      • S(a);N_GUARD,XP(D)::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • S(a);N_GUARD::QAB1(C)
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).