MESON Chess Problem Database

Problem Display
PID: 21861 (8/8/3p1R2/1bbpk2N/1N1n1p2/2nQ1P2/1B4P1/5K2 w - - 0 1)

Langstaff, William A

1st Prize, Kent County Congress, 1921

8/8/3p1R2/1bbpk2N/1N1n1p2/2nQ1P2/1B4P1/5K2

#2

8 + 8

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd3+
      • 2.Sxd3#
    • 1...Sce2
      • 2.Qf5#
    • 1...Sde2
      • 2.Qxd5#
    • 1...Se6
      • 2.Rf5#
  • Keys
    • 1.g3!
      • threat
        • 2.gxf4#
      • 1...Bxd3+
        • 2.Sxd3#
      • 1...fxg3
        • 2.f4#
      • 1...Sce2
        • 2.Qf5#
      • 1...Sde2
        • 2.Qxd5#
      • 1...Se6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(d);CHECK,XQ(D)::S(F),XB(d)
    • S(a);N_PINQ(D),P_SPINS(b)::QAR1(D)
    • S(b);N_PINQ(D),P_SPINS(a)::QAR1(D),XP(f)
    • S(b);N_GUARD,P_SPINS(a),SBLOCK::R1(H)
  • Actual
    • P(C);
    • Threat
      • P(C),XP(c)
    • Vars
      • B(d);CHECK,XQ(D)::S(F),XB(d)
      • P(c);OGATE,XP(C)::P(E)
      • S(a);N_PINQ(D),P_SPINS(b)::QAR1(D)
      • S(b);N_PINQ(D),P_SPINS(a)::QAR1(D),XP(f)
      • S(b);N_GUARD,P_SPINS(a),SBLOCK::R1(H)
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).