MESON Chess Problem Database

Problem Display
PID: 267140 (4N1B1/K2N1nq1/1pp1Pbr1/3k2nR/2p5/5P1Q/8/6B1 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Problemist, 1955

4N1B1/K2N1nq1/1pp1Pbr1/3k2nR/2p5/5P1Q/8/6B1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Sxb6#
    • 1...Sd6
      • 2.Sc7#
  • Tries
    • 1.Qf5+?
      • 1...Be5
        • 2.Sxb6#
      • 1...Se5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe4#
      • 1...Be5
        • 2.Sxb6#
      • 1...Se5
        • 2.Qd4#
      • 1...Sd6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(f);N_SPINS(c),SBLOCK::S(G),XP(d)
    • S(h);P_PINS(G),SBLOCK::S(H)
  • Tries
    • Try
      • Q(C);CHECK,N_PINS(c)
      • Vars
        • B(f);P_SPINB(f)::S(G),XP(d)
      • Refutation
        • S(h);P_PINS(G),P_SPINS(h)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • B(f);N_SPINS(c),SBLOCK::S(G),XP(d)
      • S(h);N_SPINS(c),P_PINS(G),S_CUTB(f)::QAR1(C)
      • S(h);P_PINS(G),SBLOCK::S(H)
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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).