MESON Chess Problem Database

Problem Display
PID: 4650 (b5Q1/1n3B2/5p2/3p3p/2p1k3/3N4/1P4P1/4K1B1 w - - 0 1)

Laws, Benjamin Glover

HM., Mirror of American Sports, 1885

b5Q1/1n3B2/5p2/3p3p/2p1k3/3N4/1P4P1/4K1B1

#2

7 + 7

3316 Chess Problem Text Book 1887
3360 Simple Two-move Themes 1924
3571 An English Bohemian 1933
5501 Chess Cameos 1936

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qg6#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qf3#
      • 1...Kf5
        • 2.Qf4#
        • 2.Qg6#
      • 1...cxd3!
    • 1.Qg4+?
      • 1...Kxd3
        • 2.Qe2#
        • 2.Qf5#
      • 1...hxg4!
    • 1.Qe8+?
      • 1...Kxd3
        • 2.Qe2#
      • 1...Kf5!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qxd5#
      • 1...Kxd3
        • 2.Qf5#
      • 1...cxd3
        • 2.Bxd5#
      • 1...fxg5
        • 2.Bg6#
      • 1...Sa5
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sd6
        • 2.Sc5#
      • 1...Sd8
        • 2.Sc5#
      • 1...d4
        • 2.Sf2#
      • 1...f5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Refutation
        • P(a);XS(E)
    • Try
      • Q(G);CHECK
      • Refutation
        • P(d);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(E)::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB1(G),XP(c)
    • Vars
      • K(b);S_FLIGHT,XS(E)::QAB(G)
      • P(a);SBLOCK,XS(E)::B(F),XP(c)
      • P(e);N_GUARD,XQ(G)::B(F)
      • S(f);N_GUARD::S(E)
      • S(f);N_GUARD::S(E),XS(f)
      • P(c);SBLOCK::S(E)
      • P(e);SBLOCK::QAR1(G)
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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).