MESON Chess Problem Database

Problem Display
PID: 140687 (3N1K2/6Np/R6P/4pPk1/1Q2n3/6pP/6P1/8 w - - 0 1)

Lewis, Brian Noel

Stratford Express, 1943

3N1K2/6Np/R6P/4pPk1/1Q2n3/6pP/6P1/8

#2

9 + 5

56 The Problemist 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sf7#
      • 2.Qg4#
      • 2.h4#
    • 1...Sf2
      • 2.Sf7#
      • 2.h4#
    • 1...Sc3
      • 2.Sf7#
      • 2.Qg4#
      • 2.h4#
    • 1...Sc5
      • 2.Sf7#
      • 2.Qg4#
      • 2.h4#
    • 1...Sf6
      • 2.Sf7#
  • Tries
    • 1.Sde6+?
      • 1...Kh4
        • 2.Qxe4#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kxh6!
    • 1.Sf7+?
      • 1...Kh4
        • 2.Qxe4#
      • 1...Kf4!
  • Keys
    • 1.Ra4!
      • 1...Kf4
        • 2.Qd2#
      • 1...Kh4
        • 2.Qe7#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kxh6
        • 2.Sf7#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sf2
        • 2.Qh4#
      • 1...Sc3
        • 2.Qh4#
      • 1...Sc5
        • 2.Qh4#
      • 1...Sd6
        • 2.Qh4#
      • 1...Sf6
        • 2.Sf7#
        • 2.Qd2#
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(b);::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);P_SPINS(b),S_FLIGHT::QAR(C),XS(b)
        • K(d);S_FLIGHT::QAB1(C)
      • Refutation
        • K(d);S_FLIGHT,XP(F)
    • Try
      • S(H);CHECK
      • Vars
        • K(d);P_SPINS(b),S_FLIGHT::QAR(C),XS(b)
      • Refutation
        • K(d);P_SPINS(b),S_FLIGHT
  • Actual
    • R(E);
    • Vars
      • K(d);P_SPINS(b),S_FLIGHT::QAB(C)
      • K(d);S_FLIGHT::QAB1(C)
      • K(d);S_FLIGHT,XP(F)::S(H)
      • S(b);OGATE::QAB1(C)
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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).