MESON Chess Problem Database

Problem Display
PID: 9383 (1n2KB2/nrN3Q1/1pk5/1p6/3R4/8/7b/8 w - - 0 1)

Heathcote, Godfrey

Brighton Society, 1902

1n2KB2/nrN3Q1/1pk5/1p6/3R4/8/7b/8

#2

5 + 7

3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7
      • 2.Qg2#
    • 1...Bxc7
      • 2.Qg2#
    • 1...Sa6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...b4
      • 2.Rc4#
  • Tries
    • 1.Rd6+?
      • 1...Kc5
        • 2.Qc3#
        • 2.Qd4#
      • 1...Bxd6!
    • 1.Rd7?
      • threat
        • 2.Qc3#
        • 2.Qg2#
      • 1...Rxc7
        • 2.Qg2#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Bg1
        • 2.Qf6#
        • 2.Qh6#
        • 2.Qg2#
        • 2.Qg6#
      • 1...Bg3
        • 2.Qc3#
      • 1...Be5
        • 2.Qg2#
      • 1...Sa6
        • 2.Qg2#
      • 1...b4
        • 2.Qg2#
      • 1...Bd6!
    • 1.Qf6+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kxc7!
    • 1.Qh6+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kxc7!
    • 1.Qg6+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kxc7!
    • 1.Qh7?
      • threat
        • 2.Qc2#
      • 1...Rxc7
        • 2.Qe4#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sa6
        • 2.Qd7#
      • 1...Bd6!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qc3#
      • 1...Rxc7
        • 2.Qg2#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bg1
        • 2.Rf6#
      • 1...Sa6
        • 2.Qd7#
      • 1...b4
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK,XS(B)::QAB(C)
    • B(a);SBLOCK,XS(B)::QAB(C)
    • S(g);N_GUARD::QAB1(C)
    • S(g);N_GUARD::QAB1(C),XS(g)
    • P(b);N_GUARD::R(A)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • B(a);XR(A)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XS(B)::QAB(C)
        • S(g);OGATE,XR(A)::QAB1(C),XS(g)
        • B(a);::QAR(C)
        • B(a);::QAB(C)
        • S(g);::QAB(C)
        • P(b);::QAB(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XS(B)
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • R(f);SBLOCK,XS(B)::QAB(C)
        • S(g);N_GUARD::QAB1(C),XS(g)
        • S(g);N_GUARD::QAB1(C)
      • Refutation
        • B(a);
  • Actual
    • R(A);
    • Threat
      • QAR(C)
    • Vars
      • R(f);SBLOCK,XS(B)::QAB(C)
      • S(g);N_GUARD::QAB1(C),XS(g)
      • B(a);N_GUARD::R(A)
      • S(g);N_GUARD::QAB1(C)
      • P(b);N_GUARD::R(A)
HTML5 logo

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).