MESON Chess Problem Database

Problem Display
PID: 63337 (2NR3K/3pNk2/3R4/4p1np/7r/4b3/6Q1/5rq1 w - - 0 1)

Fenner, A Jack

Chess, 1945

2NR3K/3pNk2/3R4/4p1np/7r/4b3/6Q1/5rq1

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Qd5#
    • 1...Se4
      • 2.Qa2#
    • 1...Sh7
      • 2.Qd5#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Sxe5#
        • 2.Rf8#
      • 1...Rf6
        • 2.Sxe5#
      • 1...Qh2
        • 2.Rf8#
      • 1...Rf5
        • 2.Rf8#
      • 1...Re4
        • 2.Rf8#
      • 1...Bd4
        • 2.Rf8#
      • 1...Bf4
        • 2.Rf8#
      • 1...Sf3
        • 2.Rf8#
      • 1...Sh7
        • 2.Sxe5#
        • 2.Qd5#
      • 1...e4
        • 2.Se5#
        • 2.Rf8#
      • 1...Se6!
  • Keys
    • 1.Sg8!
      • threat
        • 2.Sh6#
      • 1...Rf6
        • 2.Rxf6#
      • 1...Sf3
        • 2.Rf6#
      • 1...Sh3
        • 2.Qd5#
      • 1...Se4
        • 2.Qa2#
      • 1...Se6
        • 2.R6xd7#
      • 1...Sh7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::QAB(A)
    • S(f);N_GUARD,S_CUTR(d)::QAB(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(C),XP(e)
        • Q(b);::R1(E)
        • R(a);::R1(E)
        • R(d);::R1(E)
        • B(c);::R1(E)
        • S(f);::R1(E)
      • Refutation
        • S(f);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • R(a);N_GUARD::R1(B),XR(a)
      • S(f);S_CUTR(a)::R1(B)
      • S(f);N_GUARD::QAB(A)
      • S(f);N_GUARD,S_CUTR(d)::QAB(A)
      • S(f);SBLOCK::R(B),XP(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).