MESON Chess Problem Database

Problem Display
PID: 269501 (5R2/b1rppq1p/1r4N1/pp3k2/2N1R1p1/2B2nn1/K1B5/7Q w - - 0 1)

Smith, James Alfred John

British Chess Magazine, 1934

5R2/b1rppq1p/1r4N1/pp3k2/2N1R1p1/2B2nn1/K1B5/7Q

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Kxg6
      • 2.Rxg4#
    • 1...Qf6
      • 2.Re5#
    • 1...Rf6
      • 2.Re5#
    • 1...Sg5
      • 2.Sh4#
      • 2.Sxe7#
  • Tries
    • 1.Qh5+?
      • 1...Sg5
        • 2.Sh4#
        • 2.Sxe7#
      • 1...Sxh5!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Sxe7#
      • 1...Qxf8
        • 2.Se3#
      • 1...Rxg6
        • 2.Qf4#
      • 1...hxg6
        • 2.Qf4#
      • 1...e5
        • 2.Se7#
      • 1...Re6
        • 2.Rf4#
      • 1...Rf6
        • 2.Re5#
      • 1...d5
        • 2.Se3#
      • 1...d6
        • 2.Rxf7#
      • 1...e6
        • 2.Se3#
        • 2.Se7#
        • 2.Rf4#
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • K(f);N_GUARD,N_SPINQ(l),S_FLIGHT,XS(G)::B(C)+R(F),DCHECK,XP(c)
    • Q(l);N_PINS(E)::B(C)+R(F),DCHECK
    • R(g);N_SPINQ(l),SBLOCK::B(C)+R(F),DCHECK
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • S(G),XP(k)
    • Vars
      • Q(l);N_PINS(E),N_SPINQ(l),XR(H)::S(E)
      • R(g);SBLOCK,XS(G)::QAR1(A)
      • P(m);SBLOCK,XS(G)::QAR1(A)
      • P(k);::S(G)
      • R(g);N_PINS(E),SBLOCK::B(C)+R(F),DCHECK
      • R(g);N_SPINQ(l),SBLOCK::B(C)+R(F),DCHECK
      • P(j);N_PINS(E)::S(E)
      • P(j);S_CUTR(g)::R(H),XQ(l)
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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).