MESON Chess Problem Database

Problem Display
PID: 220204 (Bb3rq1/6Q1/K1R3nr/1p1pN3/b2kNR2/1p2pP2/4P1p1/4n3 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

British Chess Magazine, 1925

Bb3rq1/6Q1/K1R3nr/1p1pN3/b2kNR2/1p2pP2/4P1p1/4n3

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Qa7#
    • 1...Sxf3
      • 2.Sxf3#
    • 1...Sxe5
      • 2.Sf6#
  • Tries
    • 1.Sxg6+?
      • 1...Rf6
        • 2.Sd6#
      • 1...Be5
        • 2.Qxe5#
        • 2.Qa7#
      • 1...Qxg7!
    • 1.Rc4+?
      • 1...bxc4
        • 2.Sc6#
      • 1...dxc4!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Sc6#
      • 1...Sxe5+
        • 2.Sf6#
      • 1...Bxe5
        • 2.Qa7#
      • 1...dxe4
        • 2.Rxe4#
      • 1...Sc2
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(k);N_GUARD,P_SPINB(k),SBLOCK,XS(E)::QAB(H)
    • S(a);XP(B)::QAB(H)+S(E),DCHECK,XS(a)
    • S(i);N_GUARD,P_PINR(G),P_SPINS(i),SBLOCK,XS(E)::R(D)+S(C)
  • Tries
    • Try
      • S(E);CHECK,XS(i)
      • Vars
        • R(l);P_PINR(G),P_SPINR(l)::R(D)+S(C)
      • Refutation
        • Q(m);XQ(H)
    • Try
      • R(G);CHECK
      • Vars
        • P(g);SBLOCK,XR(G)::QAB(H)+S(E),DCHECK
      • Refutation
        • P(h);XR(G)
  • Actual
    • R(G);
    • Threat
      • QAB(H)+S(E),DCHECK
    • Vars
      • S(i);CHECK,N_GUARD,P_SPINS(i),SBLOCK,XS(E)::R(D)+S(C)
      • B(k);N_GUARD,P_SPINB(k),SBLOCK,XS(E)::QAB(H)
      • P(h);OGATE,P_SPINP(h),XS(C)::R1(D),XP(h)
      • S(a);N_GUARD::R(G)
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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).