MESON Chess Problem Database

Problem Display
PID: 139199 (Qrn4B/P5q1/6p1/3B4/1b6/3N4/2P3R1/knRK4 w - - 0 1)

Davis, Edward

Kipping, Cyril Stanley

The Problemist, 1937

Qrn4B/P5q1/6p1/3B4/1b6/3N4/2P3R1/knRK4

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bxb2#
  • Tries
    • 1.axb8Q+?
      • 1...Ba3
        • 2.Bxg7#
        • 2.Rxb1#
        • 2.Qxa3#
        • 2.Qxb1#
      • 1...Ba5
        • 2.Bxg7#
        • 2.Rxb1#
        • 2.Qxa5#
        • 2.Qxb1#
      • 1...Sa7!
    • 1.axb8S+?
      • 1...Ba3
        • 2.Bxg7#
        • 2.Qxa3#
      • 1...Ba5
        • 2.Bxg7#
        • 2.Qxa5#
      • 1...Sa7!
    • 1.axb8B+?
      • 1...Ba3
        • 2.Bxg7#
        • 2.Qxa3#
      • 1...Ba5
        • 2.Bxg7#
        • 2.Qxa5#
      • 1...Sa7!
    • 1.axb8R+?
      • 1...Ba3
        • 2.Bxg7#
        • 2.Rcxb1#
        • 2.Rbxb1#
        • 2.Qxa3#
      • 1...Ba5
        • 2.Bxg7#
        • 2.Rcxb1#
        • 2.Rbxb1#
        • 2.Qxa5#
      • 1...Sa7!
  • Keys
    • 1.c3!
      • threat
        • 2.Ra2#
      • 1...Qxa7
        • 2.cxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE::B(I),XQ(e)
  • Tries
    • Try
      • P(G);CHECK,XR(f)
      • Refutation
        • S(g);
    • Try
      • P(G);CHECK,XR(f)
      • Refutation
        • S(g);
    • Try
      • P(G);CHECK,XR(f)
      • Refutation
        • S(g);
    • Try
      • P(G);CHECK,XR(f)
      • Refutation
        • S(g);
  • Actual
    • P(C);N_PINQ(e)
    • Threat
      • R1(D)
    • Vars
      • Q(e);P_SPINQ(e),XP(G)::B(I)+P(C),XB(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).