MESON Chess Problem Database

Problem Display
PID: 76024 (7Q/8/P1N3K1/3k4/4N3/8/P3P3/8 w - - 0 1)

Lupton, James Money-Kyrle

The Tablet, 1923

(First published on Sat Apr 7 1923)

7Q/8/P1N3K1/3k4/4N3/8/P3P3/8

#2

7 + 1

15239 Valois Notebooks 2014
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qd4#
      • 2.Qe5#
  • Tries
    • 1.Qb2?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6!
    • 1.Qc3?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qf3#
      • 1...Ke6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sc5#
        • 2.Sg5#
        • 2.Qd6#
      • 1...Kxc6!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Sd2#
        • 2.Sd6#
        • 2.Qc5#
      • 1...Kxc6!
    • 1.Qf6?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qf3#
      • 1...Kc4!
    • 1.Qg7?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qh3?
      • 1...Kc4
        • 2.Qb3#
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kxc6!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4
        • 2.Qf3#
        • 2.Qe5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kxc6!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qd4#
      • 1...Ke6
        • 2.Sc5#
        • 2.Sg5#
        • 2.Qd6#
      • 1...Kxc6!
    • 1.Qf8?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qd6#
        • 2.Qf5#
        • 2.Qf7#
      • 1...Kxc6!
  • Keys
    • 1.Qb8!
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qd6#

This anticipates 169941(1945), 10890(1969)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB1(G)
        • K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(G);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
        • K(a);S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(G)
        • K(a);S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(G)
        • K(a);OGATE,S_FLIGHT,XS(C)::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAR1(G)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • Q(G);
    • Vars
      • K(a);S_FLIGHT::QAB1(G)
      • K(a);S_FLIGHT,XS(C)::QAR1(G)
      • K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
      • K(a);S_FLIGHT::QAR1(G)
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).