MESON Chess Problem Database

Problem Display
PID: 96283 (QnR5/p4p2/pbq2B2/7K/N1k1r1R1/PpNprB2/3n4/8 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Chess Problem, 1944

QnR5/p4p2/pbq2B2/7K/N1k1r1R1/PpNprB2/3n4/8

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5+
      • 2.Qd5#
    • 1...Qc7
      • 2.Qd5#
    • 1...Qxc8
      • 2.Qd5#
    • 1...Rd4
      • 2.Bd5#
    • 1...Rf4
      • 2.Bd5#
    • 1...Rxg4
      • 2.Bd5#
    • 1...Bc5
      • 2.Sb2#
  • Tries
    • 1.Rxc6+?
      • 1...Bc5
        • 2.Sb2#
        • 2.Rxc5#
      • 1...Sxc6!
    • 1.Qxc6+?
      • 1...Bc5
        • 2.Sb2#
        • 2.Qd5#
        • 2.Qxc5#
      • 1...Sxc6!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxf7#
      • 1...Qc5+
        • 2.Qd5#
      • 1...Qxc8
        • 2.Qd5#
      • 1...Rxg4
        • 2.Bd5#
      • 1...Qc7
        • 2.Qd5#
      • 1...Rd4
        • 2.Bd5#
      • 1...Rf4
        • 2.Bd5#
      • 1...Bd4
        • 2.Qb4#
      • 1...Bc5
        • 2.Sb2#
      • 1...Bc7
        • 2.Qb4#
      • 1...Sd7
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(i);CHECK,OGATE::QAB1(H)
    • Q(i);OGATE::QAB1(H)
    • Q(i);N_SPINQ(i),OGATE,XR(I)::QAB1(H)
    • R(f);OGATE::B(C)
    • R(f);N_SPINR(f),OGATE,XR(E)::B(C)
    • B(h);N_SPINQ(i),SBLOCK::S(D)
  • Tries
    • Try
      • R(I);CHECK,XQ(i)
      • Refutation
        • S(l);XR(I)
    • Try
      • Q(H);CHECK,XQ(i)
      • Refutation
        • S(l);P_SPINS(l),XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB(H),XP(k)
    • Vars
      • Q(i);CHECK,OGATE::QAB1(H)
      • Q(i);N_SPINQ(i),OGATE,XR(I)::QAB1(H)
      • R(f);N_SPINR(f),OGATE,XR(E)::B(C)
      • Q(i);OGATE::QAB1(H)
      • R(f);OGATE::B(C)
      • B(h);N_SPINR(f),OGATE::QAR1(H)
      • B(h);N_SPINQ(i),SBLOCK::S(D)
      • B(h);N_SPINQ(i),OGATE::QAR1(H)
      • S(l);N_GUARD::QAB(H),XP(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).