MESON Chess Problem Database

Problem Display
PID: 222660 (BB6/P3pK2/5p2/p1kN1r2/PRN2r2/4P2Q/2P5/8 w - - 0 1)

Laws, Benjamin Glover

English Mechanic and World of Science, 1884

(First published on Fri Nov 7 1884)

BB6/P3pK2/5p2/p1kN1r2/PRN2r2/4P2Q/2P5/8

#2

11 + 6

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Rb5#
    • 1...Re5
      • 2.Qc8#
    • 1...Rg5
      • 2.Qc8#
    • 1...Rh5
      • 2.Qc8#
    • 1...e5
      • 2.Bd6#
    • 1...e6
      • 2.Bd6#
  • Tries
    • 1.Sxa5?
      • threat
        • 2.Sb3#
        • 2.Rb5#
      • 1...Rxd5
        • 2.Rb5#
      • 1...Rxb4!
    • 1.Qxf5?
      • threat
        • 2.Qc8#
      • 1...e6
        • 2.Bd6#
      • 1...Rxf5!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Rc7#
      • 1...Kxc4
        • 2.Rc7#
      • 1...Kxd5
        • 2.Rc7#
      • 1...Kc6
        • 2.Rc7#
      • 1...Rxc4
        • 2.Rb5#
      • 1...Rxd5
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(a);SBLOCK,XS(F)::R1(E)
    • R(d);OGATE::QAR(C)
    • P(f);N_GUARD::B(K)
  • Tries
    • Try
      • S(F);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XS(G)::R1(E)
      • Refutation
        • R(a);XR(E)
    • Try
      • Q(C);XR(d)
      • Threat
        • QAR(C)
      • Vars
        • P(f);N_GUARD::B(K)
      • Refutation
        • R(a);XQ(C)
  • Actual
    • R(E);
    • Threat
      • R(E)
    • Vars
      • K(c);P-FLIGHT,XS(F)::R(E)
      • K(c);P-FLIGHT,XS(G)::B(J)+R(E)
      • K(c);P-FLIGHT::B(J)+R(E),DCHECK
      • R(a);SBLOCK,XS(F)::R1(E)
      • R(d);OGATE,SBLOCK,XS(G)::QAR(C)
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).