MESON Chess Problem Database

Problem Display
PID: 53805 (8/4p2r/3n1p2/b5Np/2p3kp/7b/K3P1rP/nQBB2Rq w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Chess, 1942

8/4p2r/3n1p2/b5Np/2p3kp/7b/K3P1rP/nQBB2Rq

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.e4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sb5
      • 2.Qe4#
    • 1...Sf5
      • 2.Qe4#
    • 1...Sb7
      • 2.Qe4#
    • 1...Sf7
      • 2.Qe4#
    • 1...Sc8
      • 2.Qe4#
    • 1...Se8
      • 2.Qe4#
  • Tries
    • 1.Sxh7?
      • threat
        • 2.Qg6#
      • 1...Bd2
        • 2.e3#
      • 1...Sc2
        • 2.e4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...f5!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qg6#
      • 1...Sxf7
        • 2.Qe4#
      • 1...Bd2
        • 2.e3#
      • 1...Sc2
        • 2.e4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Rh6
        • 2.Sxh6#
      • 1...Rg7
        • 2.Sh6#
      • 1...Sf5
        • 2.Qe4#
      • 1...f5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(a);N_PINP(F)::B(C)+P(F)
    • S(j);N_GUARD::QAR2(A),XS(j)
    • S(j);N_GUARD::QAR2(A)
  • Tries
    • Try
      • S(H);XR(m)
      • Threat
        • QAR2(A)
      • Vars
        • B(h);N_PINP(F)::B(C)+P(F)
        • S(a);N_PINP(F)::B(C)+P(F)
        • S(j);N_GUARD::QAR2(A),XS(j)
        • S(j);N_GUARD::QAR2(A)
      • Refutation
        • P(k);
  • Actual
    • S(H);
    • Threat
      • QAR2(A)
    • Vars
      • S(j);N_GUARD,XS(H)::QAR2(A)
      • B(h);N_PINP(F)::B(C)+P(F)
      • S(a);N_PINP(F)::B(C)+P(F)
      • S(j);N_GUARD::QAR2(A),XS(j)
      • R(m);N_GUARD::S(H),XR(m)
      • R(m);N_GUARD::S(H)
      • S(j);N_GUARD::QAR2(A)
      • P(k);N_GUARD::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).