MESON Chess Problem Database

Problem Display
PID: 9826 (5b2/4p1n1/5P2/R2Pk3/1R2N3/K2PQp1b/8/8 w - - 0 1)

Heathcote, Godfrey

Sydney Herald, 1910

5b2/4p1n1/5P2/R2Pk3/1R2N3/K2PQp1b/8/8

#2

8 + 6

3360 Simple Two-move Themes 1924
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qg5#
    • 1...Bf5
      • 2.d4#
    • 1...e6
      • 2.d6#
  • Tries
    • 1.Qg5+?
      • 1...Bf5
        • 2.Qg3#
      • 1...Sf5!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Sg3#
      • 1...exf6+
        • 2.Sd6#
      • 1...e6+
        • 2.d6#
      • 1...Kf5
        • 2.Qg5#
      • 1...Bf5
        • 2.d4#
      • 1...Be6
        • 2.dxe6#
      • 1...Sf5
        • 2.Re6#
      • 1...Se6
        • 2.dxe6#

This anticipates 156120(1931), 104372(1977)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR1(C)
    • B(b);SBLOCK::P(B)
    • P(d);P_PINR(D),SBLOCK::R(F)+P(G)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(b);P_SPINB(b),SBLOCK::QAB(C)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • R(D);
    • Threat
      • QAR(C)+S(E)
    • Vars
      • P(d);CHECK,SBLOCK,XP(H)::QAR(C)+S(E)
      • P(d);CHECK,SBLOCK::R(F)+P(G)
      • K(c);P-FLIGHT::QAR1(C)
      • B(b);SBLOCK::P(B)
      • B(b);OGATE::R(F)+P(G),XB(b)
      • S(e);N_GUARD,SBLOCK,S_CUTB(b)::R1(D)
      • S(e);OGATE::R(F)+P(G),XS(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).