MESON Chess Problem Database

Problem Display
PID: 142039 (4K3/p7/rp6/n2kP3/6Q1/1pRN4/2P3b1/b7 w - - 0 1)

Lane, Henry Fitzgerald William

1st Prize, Leisure Hour, 1901

4K3/p7/rp6/n2kP3/6Q1/1pRN4/2P3b1/b7

#2

6 + 8

15 British Chess Magazine 1901
153 La Strategie 1901
15 British Chess Magazine 1908
119 Tidskrift for Schack 1909
14867 BCPS Library 2011
56 The Problemist 2013
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qd7#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sc6
      • 2.Qc4#
    • 1...Sb7
      • 2.Qc4#
    • 1...b5
      • 2.Rc5#
  • Tries
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qd7#
      • 1...Kxd4!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rd6#
      • 1...Kxc6
        • 2.Qd7#
      • 1...Bxe5
        • 2.Sb4#
      • 1...Sxc6
        • 2.c4#
      • 1...Be4
        • 2.Qd7#
      • 1...Bd4
        • 2.Qxg2#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb7
        • 2.Qc4#
      • 1...b5
        • 2.Rc5#

This anticipates 188619(1945)

There are these afters: 47168

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAR2(D)
    • S(d);N_GUARD::QAB1(D),XS(d)
    • S(d);N_GUARD::QAB1(D)
    • P(g);N_GUARD::R1(B)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • K(e);P-FLIGHT,XQ(D)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • K(e);S_FLIGHT,XR(B)::QAB1(D)
      • B(a);SBLOCK,XP(E)::S(C)
      • S(d);N_GUARD,SBLOCK,XR(B)::P(A)
      • B(b);SBLOCK::QAR2(D)
      • B(a);SBLOCK::QAB(D),XB(b)
      • S(d);N_GUARD::QAB1(D),XS(d)
      • S(d);N_GUARD::QAB1(D)
      • P(g);N_GUARD::R1(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).