MESON Chess Problem Database

Problem Display
PID: 256585 (B6R/1q2p1N1/1r4pK/1r4p1/1p4Q1/8/8/7k w - - 0 1)

Easter, Norris

British Chess Magazine, 1933

B6R/1q2p1N1/1r4pK/1r4p1/1p4Q1/8/8/7k

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Qxg2#
    • 1...e5
      • 2.Kxg5#
    • 1...e6
      • 2.Kxg6#
  • Tries
    • 1.Se6?
      • threat
        • 2.Kxg6#
        • 2.Kg7#
      • 1...Kh2
        • 2.Kxg6#
        • 2.Kg7#
      • 1...Rxe6
        • 2.Kg7#
      • 1...Qg2
        • 2.Qxg2#
      • 1...Qe4
        • 2.Kg7#
      • 1...Qxa8!
  • Keys
    • 1.Se8!
      • threat
        • 2.Kg7#
      • 1...Kh2
        • 2.Kg7#
      • 1...Qg2
        • 2.Qxg2#
      • 1...e5
        • 2.Kxg5#
      • 1...e6
        • 2.Kxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_GUARD::QAB1(A),XQ(g)
    • P(h);::R(E)+K(B),XP(d)
    • P(h);::R(E)+K(B),XP(f)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);XS(C)::R(E)+K(B)
        • Q(g);N_GUARD::QAB1(A),XQ(g)
        • Q(g);::R(E)+K(B)
      • Refutation
        • Q(g);N_SPINQ(g),XB(D)
  • Actual
    • S(C);
    • Threat
      • R(E)+K(B)
    • Vars
      • K(a);N_SPINQ(g),P-FLIGHT::R(E)+K(B)
      • Q(g);N_GUARD::QAB1(A),XQ(g)
      • P(h);::R(E)+K(B),XP(d)
      • P(h);::R(E)+K(B),XP(f)
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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).