MESON Chess Problem Database

Problem Display
PID: 79355 (8/8/1bqn4/1b1k1P1R/BBNN3Q/P4P2/4P3/4K3 w - - 0 1)

Dugas, Eugene Albert

The Tablet, 1964

(First published on Sat Sep 19 1964)

8/8/1bqn4/1b1k1P1R/BBNN3Q/P4P2/4P3/4K3

#2

11 + 5

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Bb3#
    • 1...Sxc4
      • 2.Qe4#
  • Tries
    • 1.Qe4+?
      • 1...Kxc4
        • 2.Bb3#
      • 1...Sxe4!
    • 1.f6+?
      • 1...Kxc4
        • 2.Bb3#
      • 1...Sf5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Bb3#
      • 1...Qxc4
        • 2.Qxd6#
      • 1...Bxc4
        • 2.Bxc6#
      • 1...Bxd4
        • 2.Qe6#
      • 1...Sxc4
        • 2.e4#
      • 1...Qe8
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(G)::B(E)
    • S(e);N_GUARD,SBLOCK,XS(G)::QAB1(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(G)::B(E)
      • Refutation
        • S(e);XQ(I)
    • Try
      • P(J);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(G)::B(E)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • Q(I);
    • Threat
      • S(G)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(G)::B(E)
      • Q(d);N_GUARD,SBLOCK,XS(G)::QAR1(I),XS(e)
      • B(a);OGATE,SBLOCK,XS(G)::B(E),XQ(d)
      • B(c);SBLOCK,XS(H)::QAB1(I)
      • S(e);N_GUARD,SBLOCK,XS(G)::P(B)
      • Q(d);N_GUARD,P_PINP(B)::S(G),XB(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).