MESON Chess Problem Database

Problem Display
PID: 4864 (5Q2/2N5/r1p1pn2/3p1p1p/n2k4/3P4/2K2Ppq/6B1 w - - 0 1)

Locock, Charles Dealtry

The Schoolmaster, 1892

5Q2/2N5/r1p1pn2/3p1p1p/n2k4/3P4/2K2Ppq/6B1

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qb4#
    • 1...Qd6
      • 2.f4#
    • 1...Qxc7
      • 2.f4#
    • 1...e5
      • 2.Se6#
      • 2.Qb4#
  • Tries
    • 1.Sb5+?
      • 1...Ke5
        • 2.Qd6#
        • 2.Qb8#
      • 1...cxb5!
    • 1.Qd6?
      • threat
        • 2.Sxe6#
      • 1...Qxd6
        • 2.f4#
      • 1...Qe5
        • 2.Qb4#
      • 1...e5
        • 2.Se6#
        • 2.Qb4#
      • 1...Sc5!
    • 1.Qxf6+?
      • 1...Qe5
        • 2.Sxe6#
        • 2.f3#
        • 2.f4#
      • 1...e5
        • 2.Se6#
      • 1...Kc5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Sxe6#
      • 1...Kc5
        • 2.Sxe6#
      • 1...Ke5
        • 2.Sb5#
      • 1...Qxc7
        • 2.f4#
      • 1...Sc5
        • 2.Qb2#
      • 1...Qe5
        • 2.Qb4#
      • 1...Qd6
        • 2.f4#
      • 1...c5
        • 2.Sb5#
      • 1...e5
        • 2.Se6#
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(b);SBLOCK::QAR2(F)
    • Q(b);N_GUARD::B(A)+P(C)
    • Q(b);N_GUARD,XS(E)::B(A)+P(C)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • P(i);XS(E)
    • Try
      • Q(F);P_PINP(e)
      • Threat
        • S(E),XP(j)
      • Vars
        • Q(b);N_GUARD,N_SPINP(e),XQ(F)::B(A)+P(C)
        • Q(b);SBLOCK::QAR2(F)
      • Refutation
        • S(c);
    • Try
      • Q(F);CHECK,XS(k)
      • Vars
        • P(j);P_SPINP(j)::S(E)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • S(E),XP(j)
    • Vars
      • K(d);S_FLIGHT::S(E),XP(j)
      • K(d);S_FLIGHT::QAB(F)+S(E)
      • Q(b);N_GUARD,XS(E)::B(A)+P(C)
      • S(c);N_GUARD,SBLOCK::QAB(F)
      • Q(b);SBLOCK::QAR2(F)
      • Q(b);N_GUARD::B(A)+P(C)
      • P(i);N_GUARD,SBLOCK::S(E)
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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).