MESON Chess Problem Database

Problem Display
PID: 148723 (1K6/4R2B/4P1n1/2pN4/3Pk1bP/1p1p1R2/Q7/B4N2 w - - 0 1)

Collins, Francis Charles

City of London Chess Magazine, 1874

1K6/4R2B/4P1n1/2pN4/3Pk1bP/1p1p1R2/Q7/B4N2

#2

11 + 6

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Rf4#
  • Tries
    • 1.Re3+?
      • 1...Kf5
        • 2.Sg3#
        • 2.Re5#
        • 2.Rf7#
      • 1...Kxd5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Sg3#
      • 1...Bxf5
        • 2.Qg2#
      • 1...b2
        • 2.Rf4#
      • 1...d2
        • 2.Qb1#
      • 1...Sf4
        • 2.Sd2#
      • 1...Se5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(a);::R1(D)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(c);N_SPINS(f),P_SPINP(a),S_FLIGHT,XS(G)
  • Actual
    • R(D);N_PINS(f)
    • Threat
      • S(B)
    • Vars
      • K(c);P_SPINS(f),S_FLIGHT,XR(D)::S(B)
      • B(d);N_GUARD,SBLOCK,XR(D)::QAB(C)
      • P(a);::R1(D)
      • P(b);OGATEB::QAB(C)
      • S(f);::S(B)
      • S(f);::S(G)
HTML5 logo

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).