MESON Chess Problem Database

Problem Display
PID: 30755 (K7/4npN1/5Np1/2n4p/3P1k1P/6p1/4Q3/8 w - - 0 1)

Laws, Benjamin Glover

The Chess Player's Chronicle (Sampson), 1882

K7/4npN1/5Np1/2n4p/3P1k1P/6p1/4Q3/8

#2

6 + 7

2638 White to Play 1913
15 British Chess Magazine 1918

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sa6
      • 2.Qe4#
    • 1...Se6
      • 2.Qe4#
    • 1...Sb7
      • 2.Qe4#
    • 1...Sd7
      • 2.Qe4#
    • 1...Sd5
      • 2.Sxd5#
    • 1...Sf5
      • 2.Sd5#
    • 1...Sc6
      • 2.Sd5#
    • 1...Sc8
      • 2.Sd5#
    • 1...Sg8
      • 2.Sd5#
    • 1...g2
      • 2.Qf2#
    • 1...g5
      • 2.Sfxh5#
  • Tries
    • 1.Sgxh5+?
      • 1...Kf5
        • 2.Qg4#
        • 2.Qe5#
      • 1...gxh5!
    • 1.Se6+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Sxe6
        • 2.Qe4#
      • 1...fxe6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qf1#
      • 1...Kxf5
        • 2.Qe5#
      • 1...Sxf5
        • 2.Sd5#
      • 1...gxf5
        • 2.Sxh5#
      • 1...Sd3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...g2
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • S(c);N_GUARD::QAR1(A)
    • S(c);N_GUARD::QAR1(A),XS(c)
    • S(f);N_GUARD::S(D),XS(f)
    • S(f);N_GUARD::S(D)
    • P(a);N_GUARD::QAR2(A)
    • P(e);N_GUARD::S(D),XP(d)
  • Tries
    • Try
      • S(E);CHECK,XP(d)
      • Refutation
        • P(e);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • S(c);XS(E)::QAR1(A)
      • Refutation
        • P(g);XS(E)
  • Actual
    • S(E);
    • Threat
      • QAR(A)
    • Vars
      • K(b);P-FLIGHT,XS(E)::QAR1(A)
      • S(f);N_GUARD,SBLOCK,XS(E)::S(D)
      • P(e);N_GUARD,SBLOCK,XS(E)::S(D),XP(d)
      • S(c);N_GUARD::QAR1(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
      • P(a);N_GUARD::QAR2(A)
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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).