MESON Chess Problem Database

Problem Display
PID: 267203 (4k3/1bK3p1/p6N/2B1Np2/r6n/8/4Q3/4R3 w - - 0 1)

Lytton, Cedric C (was Sells, CCL)

The Problemist, 1955

4k3/1bK3p1/p6N/2B1Np2/r6n/8/4Q3/4R3

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc6#
    • 1...Ra5
      • 2.Sc6#
  • Tries
    • 1.Qb5+?
      • 1...Bc6
        • 2.Sc4#
        • 2.Qxc6#
        • 2.Qb8#
      • 1...axb5!
    • 1.Qh5+?
      • 1...Sg6
        • 2.Qxg6#
      • 1...g6!
  • Keys
    • 1.Qxa6!
      • threat
        • 2.Qe6#
      • 1...Rxa6
        • 2.Sc6#
      • 1...Bxa6
        • 2.Sc4#
      • 1...Bd5
        • 2.Qc8#
      • 1...Bc6
        • 2.Qc8#
        • 2.Qxc6#
      • 1...Bc8
        • 2.Qxc8#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::QAR(B)+S(D)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(B),XS(b)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • Q(B);XP(d)
    • Threat
      • QAR2(B)
    • Vars
      • R(a);N_GUARD,XQ(B)::R(A)+S(D)
      • B(e);N_GUARD,XQ(B)::R(A)+S(D)
      • B(e);OGATE::QAR2(B)
      • B(e);OGATE::QAR2(B),XB(e)
      • S(b);N_GUARD::QAB(B),XS(b)
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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).