MESON Chess Problem Database

Problem Display
PID: 9582 (2Q5/qp6/8/3p1n2/R1Nk4/1p6/1b1BP3/rB3bK1 w - - 0 1)

Heathcote, Godfrey

Chess Amateur (The), 1906

2Q5/qp6/8/3p1n2/R1Nk4/1p6/1b1BP3/rB3bK1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.e3#
    • 1...Sh4
      • 2.e3#
    • 1...Sd6
      • 2.e3#
    • 1...Sh6
      • 2.e3#
    • 1...Se7
      • 2.e3#
    • 1...Sg7
      • 2.e3#
  • Tries
    • 1.Sxb2+?
      • 1...Qxa4
        • 2.Qc3#
      • 1...Rxa4
        • 2.Qc3#
      • 1...Ke5+!
    • 1.Se5+?
      • 1...Qxa4
        • 2.Sf3#
      • 1...Rxa4
        • 2.Sf3#
      • 1...Kxe5+!
    • 1.Be3+?
      • 1...Kc3
        • 2.Sb6#
      • 1...Sxe3!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Be5#
      • 1...Kc3+
        • 2.Sb6#
      • 1...Rxb1
        • 2.Sa5#
      • 1...dxc4
        • 2.Qxc4#
      • 1...Qb8
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(g);N_GUARD::P(D)
  • Tries
    • Try
      • S(F);CHECK,XB(c)
      • Vars
        • Q(h);XR(E)::QAB1(G)
        • R(a);XR(E)::QAB1(G)
      • Refutation
        • K(e);CHECK,S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • Q(h);XR(E)::S(F)
        • R(a);XR(E)::S(F)
      • Refutation
        • K(e);CHECK,S_FLIGHT,XS(F)
    • Try
      • B(C);CHECK
      • Vars
        • K(e);P_PINB(C),S_FLIGHT::QAR(G)+S(F)
      • Refutation
        • S(g);XB(C)
  • Actual
    • B(C);
    • Threat
      • B(C)
    • Vars
      • K(e);CHECK,S_FLIGHT::QAR(G)+S(F)
      • R(a);N_GUARD,XB(A)::R(E)+S(F)
      • P(f);OGATE,P_SPINP(f),XS(F)::QAR1(G),XP(f)
      • Q(h);N_GUARD::R(E)+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).