MESON Chess Problem Database

Problem Display
PID: 18289 (8/8/2K1p1B1/3Pk1P1/4P2R/8/1b6/3Q4 w - - 0 1)

Harley, Brian

Time & Tide, 1954

(First published on Sat May 1 1954)

8/8/2K1p1B1/3Pk1P1/4P2R/8/1b6/3Q4

#2

7 + 3

5454 Near Snap 2010
15290 Harley Scrapbook 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
    • 1...exd5
      • 2.Qxd5#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qxb2#
      • 1...exd5
        • 2.Qxd5#
      • 1...Bc1
        • 2.Qc3#
      • 1...Ba3
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qf4#
        • 2.Qh2#
      • 1...Ba1!
    • 1.Qd3?
      • 1...exd5
        • 2.Qxd5#
      • 1...Bc1
        • 2.Qc3#
      • 1...Ba3
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qg3#
      • 1...Ba1!
    • 1.dxe6?
      • threat
        • 2.Qd5#
        • 2.Qd6#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Ba3
        • 2.Qd5#
      • 1...Bd4!
  • Keys
    • 1.Qe1!
      • 1...Kd4
        • 2.e5#
      • 1...exd5
        • 2.exd5#
      • 1...Bc1
        • 2.Qc3#
      • 1...Ba1
        • 2.Qxa1#
      • 1...Ba3
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qg3#

This anticipates 86961(1982)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
    • P(c);OGATE,XP(D)::QAR1(A),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • P(c);OGATE,XP(D)::QAR1(A),XP(c)
        • B(a);N_GUARD::QAB(A)
        • B(a);N_GUARD::QAB(A),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Vars
        • P(c);OGATE,XP(D)::QAR1(A),XP(c)
        • B(a);N_GUARD::QAB(A)
        • B(a);N_GUARD::QAB(A),XB(a)
        • B(a);SBLOCK::QAB(A)
      • Refutation
        • B(a);
    • Try
      • P(D);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT,XP(D)::QAR1(A)
        • B(a);::QAR1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Vars
      • K(b);OGATE,S_FLIGHT::R(C)+P(B)
      • P(c);OGATE,XP(D)::QAR(A)+P(B),XP(c)
      • B(a);N_GUARD::QAB(A)
      • B(a);OGATEB::QAB(A),XB(a)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAB(A)
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).