MESON Chess Problem Database

Problem Display
PID: 21920 (2BQ4/4N2b/6R1/7p/4n2k/6p1/2K5/2b1B3 w - - 0 1)

Harley, Brian

Watney, Charles Gold

Chess Pie, 1922

2BQ4/4N2b/6R1/7p/4n2k/6p1/2K5/2b1B3

#2

6 + 6

3360 Simple Two-move Themes 1924
887 Mate in Two Moves 1931
3310 2345 Chess Problems 1997
56 The Problemist 2004
15290 Harley Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg6
      • 2.Sxg6#
    • 1...Sd2
      • 2.Sd5#
      • 2.Sc6#
      • 2.Sg8#
      • 2.Bxg3#
    • 1...Sc3
      • 2.Bxg3#
    • 1...Sc5
      • 2.Bxg3#
    • 1...Sd6
      • 2.Bxg3#
    • 1...Sf6
      • 2.Bxg3#
  • Keys
    • 1.Rxg3!
      • threat
        • 2.Sf5#
        • 2.Sg6#
      • 1...Sf2+
        • 2.Sf5#
      • 1...Sxg3+
        • 2.Sg6#
      • 1...Sg5+
        • 2.Rd3#
      • 1...Sf6+
        • 2.Rg6#
      • 1...Bg5
        • 2.Rh3#
      • 1...Bf5
        • 2.Sxf5#
        • 2.Sg6#
      • 1...Bg6
        • 2.Sf5#
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(f);XR(C)::QAB(F)+S(D),DCHECK,XB(f)
    • S(c);N_GUARD,P_PINR(C)::B(A),XP(b)
  • Actual
    • R(C);XP(b)
    • Threat
      • DUALS(2)
    • Vars
      • S(c);CHECK::QAB(F)+S(D),DCHECK
      • S(c);CHECK,P_SPINS(c),XR(C)::QAB(F)+S(D),DCHECK
      • S(c);CHECK,N_GUARD,SBLOCK::B(A)+R(C)
      • S(c);CHECK,N_GUARD::B(A)+R(C)
      • B(a);SBLOCK::B(A)+R(C),DCHECK
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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).