MESON Chess Problem Database

Problem Display
PID: 258603 (1qkr4/Q2N1N2/1P6/1K1p4/8/8/8/8 w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

English Mechanic and World of Science, 1899

(First published on Fri Aug 11 1899)

1qkr4/Q2N1N2/1P6/1K1p4/8/8/8/8

#2

5 + 4

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qc7
      • 2.Qxc7#
    • 1...Qxb6+
      • 2.Sxb6#
    • 1...Qa8
      • 2.Sd6#
      • 2.Qc7#
  • Keys
    • 1.Kc6!
      • threat
        • 2.Qxb8#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qc7+
        • 2.Qxc7#
      • 1...Qxb6+
        • 2.Sxb6#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Qa8+
        • 2.Qxa8#
      • 1...Qxa7
        • 2.Sd6#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Qh2
        • 2.Qa6#
        • 2.Qb7#
        • 2.b7#
      • 1...Qg3
        • 2.Qa6#
        • 2.Qb7#
        • 2.b7#
      • 1...Qf4
        • 2.Qa6#
        • 2.Qb7#
        • 2.b7#
      • 1...Qe5
        • 2.Qa6#
        • 2.Qb7#
        • 2.b7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD,N_PINP(B)::S(E),XQ(b)
    • Q(b);N_GUARD,N_PINP(B)::QAR1(C),XQ(b)
    • Q(b);CHECK,XP(B)::S(D),XQ(b)
  • Actual
    • K(A);N_SPINP(B),S_FLIGHT
    • Threat
      • QAR1(C),XQ(b)
    • Vars
      • Q(b);CHECK,N_GUARD::S(E),XQ(b)
      • Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
      • Q(b);CHECK,XP(B)::S(D),XQ(b)
      • Q(b);CHECK,N_GUARD::QAB1(C),XQ(b)
      • Q(b);CHECK,OGATEB::QAR2(C),XQ(b)
      • Q(b);N_GUARD,XQ(C)::S(E)
      • R(d);OGATE,XS(D)::QAB1(C),XR(d)
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).