MESON Chess Problem Database

Problem Display
PID: 66850 (4n3/p5bR/8/k2NB3/p1B5/5Q1K/p7/q4n2 w - - 0 1)

Kipping, Cyril Stanley

Chess, 1947

4n3/p5bR/8/k2NB3/p1B5/5Q1K/p7/q4n2

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Qxc3#
    • 1...Qd1
      • 2.Qc3#
    • 1...Bxe5
      • 2.Rxa7#
    • 1...Bf6
      • 2.Rxa7#
    • 1...Bh6
      • 2.Rxa7#
    • 1...Bf8
      • 2.Rxa7#
    • 1...Bh8
      • 2.Rxa7#
    • 1...Sf6
      • 2.Bc7#
    • 1...Sc7
      • 2.Bxc7#
    • 1...a3
      • 2.Qxa3#
  • Tries
    • 1.Bc3+?
      • 1...Bxc3
        • 2.Rxa7#
      • 1...Qxc3!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qa6#
      • 1...Qc3+
        • 2.Bxc3#
      • 1...Bxf6
        • 2.Rxa7#
      • 1...Sxf6
        • 2.Bc7#
      • 1...Sd6
        • 2.Qd8#
      • 1...Sc7
        • 2.Bxc7#
      • 1...a6
        • 2.Qxa6#
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD,P_PINQ(A)::QAB(A),XQ(a)
    • Q(a);N_GUARD::QAB(A)
    • B(g);OGATE,XB(E)::R(F),XP(f)
    • B(g);OGATE::R(F),XP(f)
    • S(h);N_GUARD::B(E)
    • S(h);N_GUARD::B(E),XS(h)
    • P(d);OGATEB::QAR2(A),XP(d)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • B(g);OGATE,XB(E)::R(F),XP(f)
      • Refutation
        • Q(a);P_PINQ(A),XB(E)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(a);CHECK,N_GUARD::B(E),XQ(a)
      • B(g);OGATE,XQ(A)::R(F),XP(f)
      • S(h);N_GUARD,XQ(A)::B(E)
      • S(h);N_GUARD::QAB(A)
      • S(h);N_GUARD::B(E),XS(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).