MESON Chess Problem Database

Problem Display
PID: 272224 (8/2K1p1r1/2p1P3/1pkrQNR1/nR6/P2Pb3/3p1pn1/4q3 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Problemist, 1957

8/2K1p1r1/2p1P3/1pkrQNR1/nR6/P2Pb3/3p1pn1/4q3

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.d4#
    • 1...Bxg5
      • 2.d4#
    • 1...Sc3
      • 2.Qxc3#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Se4#
        • 2.Sb7#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Bxg5
        • 2.Sb7#
        • 2.d4#
      • 1...Bd4
        • 2.Sb7#
        • 2.Qxd4#
      • 1...Bf4
        • 2.Sb7#
        • 2.Qd4#
        • 2.d4#
      • 1...Sc3
        • 2.Sb7#
        • 2.Qxc3#
      • 1...exd6+!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Se4#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Bxg5
        • 2.d4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bf4
        • 2.d4#
      • 1...Sc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(e);N_GUARD,P_PINQ(D)::P(B)
    • B(e);N_GUARD,XR(F)::P(B)
    • S(f);N_GUARD::QAR2(D),XS(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(i);OGATE,XQ(D)::R(F),XR(i)
      • Refutation
        • P(k);CHECK,XS(E)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • R(i);OGATE,XQ(D)::R(F),XR(i)
      • B(e);N_GUARD,XR(F)::P(B)
      • B(e);N_GUARD::QAB1(D),XB(e)
      • B(e);N_GUARD,P_PINQ(D)::P(B)
      • S(f);N_GUARD::QAR2(D),XS(f)
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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).