MESON Chess Problem Database

Problem Display
PID: 51253 (4B3/8/8/3p1p2/2p1kpr1/3r1N2/3R1P2/KQ6 w - - 0 1)

Thompson, SJ

Manchester Guardian, 1955

4B3/8/8/3p1p2/2p1kpr1/3r1N2/3R1P2/KQ6

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qxd3#
    • 1...d4
      • 2.Bc6#
      • 2.Qb7#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
      • 1...d4
        • 2.Bc6#
      • 1...Rg1
        • 2.Re3#
      • 1...c3
        • 2.Rxc3#
        • 2.Re3#
      • 1...cxd3!
  • Keys
    • 1.Bh5!
      • 1...Kxf3
        • 2.Qh1#
      • 1...d4
        • 2.Qb7#
      • 1...Rg1
        • 2.Re2#
      • 1...Rg2
        • 2.Re2#
      • 1...Rg3
        • 2.Re2#
      • 1...Rh4
        • 2.Re2#
      • 1...Rg5
        • 2.Re2#
      • 1...Rg6
        • 2.Re2#
      • 1...Rg7
        • 2.Re2#
      • 1...Rg8
        • 2.Re2#
      • 1...c3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAB1(B),XR(a)
  • Tries
    • Try
      • R(C);XR(a)
      • Threat
        • DUALS(4)
      • Vars
        • P(f);OGATEB::B(F)
        • R(e);P_PINQ(B)::QAB(B)+R(C),DCHECK
      • Refutation
        • P(b);P_SPINP(b),XR(C)
  • Actual
    • B(F);
    • Vars
      • K(c);N_SPINR(a),OGATEB,P_SPINR(e),S_FLIGHT,XS(E)::QAB(B)
      • P(f);OGATEB::QAB(B)
      • R(e);P_PINQ(B)::R(C)
      • R(e);::R(C)
      • P(b);N_GUARD::QAB1(B),XR(a)
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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).