MESON Chess Problem Database

Problem Display
PID: 24445 (8/1r6/b1rp1P2/2pk1Kn1/4N2R/2Q5/8/6n1 w - - 0 1)

Heathcote, Godfrey

Alkmaarsche Courant, 1911

8/1r6/b1rp1P2/2pk1Kn1/4N2R/2Q5/8/6n1

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...c4
      • 2.Qd2#
  • Tries
    • 1.Qd2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Kc4!
    • 1.Qb3+?
      • 1...Kd4
        • 2.Sxg5#
      • 1...Bc4
        • 2.Sc3#
      • 1...c4
        • 2.Qd1#
      • 1...Rxb3!
    • 1.Qc4+?
      • 1...Bxc4
        • 2.Sc3#
      • 1...Kxc4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sc3#
      • 1...Kc4
        • 2.Sxd6#
      • 1...Kd4
        • 2.Sxg5#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...c4
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(h);S_CUTB(e)::QAR2(A)
    • B(e);N_GUARD,P_PINS(B)::QAR2(A),XB(e)
    • P(b);SBLOCK,S_CUTB(e)::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(e);N_GUARD,P_PINS(B),P_SPINB(e)::QAR2(A),XB(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::R(C)+S(B),XS(d)
        • B(e);P_SPINB(e)::S(B)
        • P(b);P_SPINP(b),SBLOCK,S_CUTB(e)::QAR(A)
      • Refutation
        • R(h);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • B(e);XQ(A)::S(B)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+S(B),DCHECK
    • Vars
      • K(c);S_FLIGHT::R(C)+S(B),DCHECK,XP(g)
      • K(c);P-FLIGHT::R(C)+S(B),XS(d)
      • S(d);OGATE,P_SPINS(d),XS(B)::QAB1(A),XS(d)
      • B(e);N_GUARD,P_PINS(B)::QAR2(A),XB(e)
      • P(b);SBLOCK,S_CUTB(e)::QAR(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).