MESON Chess Problem Database

Problem Display
PID: 20957 (3R4/4Nk1N/5B1n/Kp3p1P/p1q5/8/B7/8 w - - 0 1)

Bonner Feast, Frederick

Hampstead Express, 1914

3R4/4Nk1N/5B1n/Kp3p1P/p1q5/8/B7/8

#2

7 + 6

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Bxd5#
    • 1...Qe6
      • 2.Rf8#
    • 1...b4
      • 2.Bxc4#
  • Tries
    • 1.Sg8?
      • threat
        • 2.Sg5#
      • 1...Ke6
        • 2.Sg5#
      • 1...Sxg8!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sg5#
      • 1...Qc3+
        • 2.Sxc3#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Qc7+
        • 2.Sxc7#
      • 1...Ke6
        • 2.Sg5#
      • 1...Qxd5
        • 2.Bxd5#
      • 1...Qc1
        • 2.Sc3#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Qg4
        • 2.Sf4#
      • 1...Qh4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • Q(b);OGATE::B(A),XQ(b)
    • Q(b);::R1(G)
    • P(c);N_GUARD::B(A),XQ(b)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(F)
      • Vars
        • K(f);S_FLIGHT::S(F)
      • Refutation
        • S(e);XS(E)
  • Actual
    • S(E);N_PINQ(b)
    • Threat
      • S(F)
    • Vars
      • Q(b);CHECK::B(A)+S(E),XQ(b)
      • K(f);S_FLIGHT::S(F)
      • Q(b);OGATE,P_SPINQ(b),XS(E)::B(A),XQ(b)
      • Q(b);::B(A)+S(E)
      • Q(b);::B(A)+S(E),XQ(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).