MESON Chess Problem Database

Problem Display
PID: 45959 (6nK/Nbp3R1/3k3p/1ppp2r1/2q3nN/7B/7b/4Q3 w - - 0 1)

Howard, David M

Problem Observer, 2002

6nK/Nbp3R1/3k3p/1ppp2r1/2q3nN/7B/7b/4Q3

#2

6 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sxf5#
    • 1...Rg6
      • 2.Sf5#
    • 1...Bc6
      • 2.Sc8#
    • 1...Sf2
      • 2.Rd7#
      • 2.Qe6#
    • 1...S4f6
      • 2.Qe6#
    • 1...S8f6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Sc8+?
      • 1...Kc6
        • 2.Qe8#
      • 1...Bxc8!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Rd7#
      • 1...Rxg7
        • 2.Sf5#
      • 1...Se7
        • 2.Qxe7#
      • 1...Qc3
        • 2.Sxb5#
      • 1...Qd4
        • 2.Sxb5#
      • 1...Be5
        • 2.Qd7#
      • 1...Bc6
        • 2.Sc8#
      • 1...Bc8
        • 2.Sxc8#
      • 1...Se5
        • 2.Qe6#
      • 1...S4f6
        • 2.Qe6#
      • 1...S8f6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::S(C),XR(g)
    • R(g);N_GUARD::S(C)
    • B(j);N_GUARD,SBLOCK::S(D)
    • S(c);::QAR1(A)
    • S(l);N_GUARD::QAB1(A)
    • S(l);N_GUARD::QAB1(A),XS(l)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(h);P-FLIGHT::QAB(A)
      • Refutation
        • B(j);XS(D)
  • Actual
    • Q(A);
    • Threat
      • R1(E)
    • Vars
      • R(g);N_GUARD,XR(E)::S(C)
      • S(l);N_GUARD::QAB1(A),XS(l)
      • Q(b);N_GUARD,P_PINR(E)::S(D),XP(d)
      • B(a);P_PINR(E),SBLOCK::QAR1(A)
      • B(j);N_GUARD::S(D)
      • B(j);N_GUARD::S(D),XB(j)
      • S(c);::QAR1(A)
      • S(l);N_GUARD::QAB1(A)
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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).