MESON Chess Problem Database

Problem Display
PID: 134762 (8/8/b1Q5/1p4p1/p2pP3/1p1k2NR/3pNP2/1R5K w - - 0 1)

Brotherton, David WA

The Field, 1966

(First published on Thu Aug 4 1966)

8/8/b1Q5/1p4p1/p2pP3/1p1k2NR/3pNP2/1R5K

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...d1Q+
      • 2.Rxd1#
    • 1...d1S
      • 2.Rxd1#
    • 1...d1B
      • 2.Rxd1#
    • 1...d1R+
      • 2.Rxd1#
    • 1...a3
      • 2.Rxb3#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Sg1?
      • threat
        • 2.Sf1#
        • 2.S3e2#
        • 2.Sf5#
        • 2.Sh5#
      • 1...d1Q
        • 2.Rxd1#
      • 1...d1S
        • 2.Rxd1#
      • 1...d1B
        • 2.Rxd1#
      • 1...d1R
        • 2.Sf1#
        • 2.Rxd1#
      • 1...Bc8
        • 2.Sf5#
      • 1...g4!
  • Keys
    • 1.Rb2!
      • 1...d1Q+
        • 2.Sf1#
      • 1...d1R+
        • 2.Sf1#
      • 1...d1S
        • 2.Sc1#
      • 1...d1B
        • 2.Sc1#
        • 2.Sf1#
        • 2.Sf5#
        • 2.Sh5#
      • 1...Bb7
        • 2.Qxb5#
      • 1...Bc8
        • 2.Qxb5#
      • 1...a3
        • 2.Rxb3#
      • 1...b4
        • 2.Qxa6#
      • 1...g4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);CHECK,OGATEB::R(A),XQ(a)
    • P(a);OGATEB::R(A),XS(a)
    • P(a);OGATEB::R(A),XB(a)
    • P(a);CHECK,OGATEB::R(A),XR(a)
    • P(d);N_GUARD::R(A),XP(b)
    • P(g);N_GUARD::S(C)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(4)
      • Vars
        • P(a);OGATEB,P_PINS(C)::R(A),XQ(a)
        • P(a);OGATEB::R(A),XS(a)
        • P(a);OGATEB::R(A),XB(a)
        • B(h);::R(F)+S(E)
      • Refutation
        • P(g);
  • Actual
    • R(A);
    • Vars
      • P(a);CHECK::R(F)+S(E)
      • P(a);N_GUARD::S(C)
      • B(h);N_GUARD::QAB(H),XP(f)
      • P(d);N_GUARD::R(A),XP(b)
      • P(f);OGATEB::QAB(H),XB(h)
      • P(g);N_GUARD::S(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).