MESON Chess Problem Database

Problem Display
PID: 24449 (B7/1Q4n1/2N4N/P1Pk4/8/5K2/1n1P4/6B1 w - - 0 1)

Hurley, WT

The Williamsonian, 1918

B7/1Q4n1/2N4N/P1Pk4/8/5K2/1n1P4/6B1

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Se5#
    • 1...Ke6
      • 2.Qf7#
    • 1...Sd1
      • 2.Qb3#
    • 1...Sd3
      • 2.Qb3#
    • 1...Sa4
      • 2.Qb3#
    • 1...Sf5
      • 2.Qf7#
    • 1...Sh5
      • 2.Qf7#
    • 1...Se8
      • 2.Qf7#
  • Tries
    • 1.Sd4+?
      • 1...Kc4
        • 2.Qb5#
      • 1...Ke5
        • 2.Sg4#
        • 2.Qxg7#
      • 1...Kxc5!
    • 1.Sd8+?
      • 1...Ke5
        • 2.Qxb2#
        • 2.Qxg7#
      • 1...Kc4!
    • 1.Qxb2?
      • threat
        • 2.Qa2#
        • 2.Qb3#
      • 1...Kc4
        • 2.Se5#
      • 1...Ke6!
    • 1.Qxg7?
      • threat
        • 2.Qf7#
        • 2.Qg8#
      • 1...Ke6
        • 2.Sd4#
        • 2.Sd8#
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qb8?
      • 1...Kc4
        • 2.Se5#
      • 1...Ke6
        • 2.Qd6#
      • 1...Sc4
        • 2.Sd8#
      • 1...Sd1
        • 2.Qb3#
      • 1...Sd3
        • 2.Qb3#
      • 1...Sa4
        • 2.Qb3#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sh5
        • 2.Qg8#
      • 1...Se6
        • 2.Se5#
      • 1...Se8!
    • 1.d3?
      • threat
        • 2.Qd7#
      • 1...Ke6
        • 2.Qf7#
      • 1...Sxd3
        • 2.Qb3#
      • 1...Sf5
        • 2.Qf7#
      • 1...Se8
        • 2.Qf7#
      • 1...Sc4!
    • 1.d4?
      • 1...Ke6
        • 2.Qf7#
      • 1...Sc4
        • 2.Sd8#
      • 1...Sd1
        • 2.Qb3#
      • 1...Sd3
        • 2.Qb3#
      • 1...Sa4
        • 2.Qb3#
      • 1...Sf5
        • 2.Qf7#
      • 1...Sh5
        • 2.Qf7#
      • 1...Se6
        • 2.Se5#
      • 1...Se8
        • 2.Qf7#
      • 1...Kc4!
  • Keys
    • 1.Sg4!
      • 1...Kc4
        • 2.Sce5#
      • 1...Ke6
        • 2.Sd4#
      • 1...Sd1
        • 2.Qb3#
      • 1...Sd3
        • 2.Qb3#
      • 1...Sa4
        • 2.Qb3#
      • 1...Sc4
        • 2.Sd8#
      • 1...Sf5
        • 2.Qf7#
      • 1...Sh5
        • 2.Qf7#
      • 1...Se6
        • 2.Sce5#
      • 1...Se8
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(F)
    • K(b);S_FLIGHT::QAB1(H)
    • S(a);N_GUARD::QAB(H)
    • S(c);N_GUARD::QAB(H)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
      • Refutation
        • K(b);P-FLIGHT,XP(E)
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);XS(c)
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(b);S_FLIGHT::S(F)
        • K(b);S_FLIGHT::QAR1(H)
        • S(a);SBLOCK::B(I)+S(F)
        • S(a);N_GUARD::QAB(H)
        • S(c);N_GUARD::QAB(H)
        • S(c);SBLOCK::B(I)+S(F)
      • Refutation
        • S(c);
    • Try
      • P(B);
      • Threat
        • QAR2(H)
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
        • S(a);N_GUARD,XP(B)::QAB(H)
        • S(c);N_GUARD::QAB(H)
      • Refutation
        • S(a);
    • Try
      • P(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
        • S(a);SBLOCK::QAB(H)+S(F)
        • S(a);N_GUARD::QAB(H)
        • S(c);N_GUARD::QAB(H)
        • S(c);SBLOCK::QAB(H)+S(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(G);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • S(a);N_GUARD::QAB(H)
      • S(a);SBLOCK::QAB(H)+S(F)
      • S(c);N_GUARD::QAB(H)
      • S(c);SBLOCK::QAB(H)+S(F)
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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).