MESON Chess Problem Database

Problem Display
PID: 51478 (8/8/8/7Q/4N3/6N1/3K1pkp/5RqR w - - 0 1)

Brotherton, David WA

The Guardian, 1961

8/8/8/7Q/4N3/6N1/3K1pkp/5RqR

#2

6 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Ke3?
      • 1...Qxf1
        • 2.Qxh2#
      • 1...Qxh1!
    • 1.Sf5?
      • 1...Kxf1
        • 2.Se3#
        • 2.Qh3#
      • 1...Kxh1
        • 2.Qf3#
      • 1...Qxh1
        • 2.Se3#
      • 1...Qxf1!
  • Keys
    • 1.Se2!
      • 1...Kxf1
        • 2.Qh3#
      • 1...Kxh1
        • 2.Qf3#
      • 1...Qxf1
        • 2.Rxh2#
      • 1...Qxh1
        • 2.Rxf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • Q(a);N_GUARD,XR(A)::QAR1(F),XP(d)
      • Refutation
        • Q(a);XR(B)
    • Try
      • S(D);
      • Vars
        • K(c);P_SPINP(d),P_SPINQ(a),S_FLIGHT,XR(B)::QAB(F)
        • Q(a);XR(B)::S(D)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • S(D);
    • Vars
      • K(c);P_SPINQ(a),S_FLIGHT,XR(A)::QAB(F)
      • K(c);P_SPINP(d),P_SPINQ(a),S_FLIGHT,XR(B)::QAB(F)
      • Q(a);N_GUARD,SBLOCK,XR(A)::R1(B),XP(d)
      • Q(a);N_GUARD,SBLOCK,XR(B)::R1(A),XP(b)
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).