MESON Chess Problem Database

Problem Display
PID: 21417 (Rb2kn2/2pp2R1/1r2bBN1/1r5B/2N5/7p/4Q2K/8 w - - 0 1)

White, Alain Campbell

9. Magee Theme Supplement (February), 1919

Rb2kn2/2pp2R1/1r2bBN1/1r5B/2N5/7p/4Q2K/8

#2

8 + 9

3132 The Good Companion Two-Mover 1922
887 Mate in Two Moves 1931
45 Schach 1951
3979 Systematic Terminology 1984
145 StrateGems 2012
136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...c6+
      • 2.Sd6#
  • Tries
    • 1.Sge5+?
      • 1...Bf7
        • 2.Bxf7#
      • 1...Sg6!
    • 1.Sh8+?
      • 1...Sg6
        • 2.Rg8#
      • 1...Rxh5!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Rxf8#
      • 1...c5+
        • 2.Sf4#
      • 1...c6+
        • 2.Sd6#
      • 1...Kf7
        • 2.Rxf8#
      • 1...d5
        • 2.Sxf8#
      • 1...d6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);CHECK,N_GUARD,S_CUTR(c)::S(C)
  • Tries
    • Try
      • S(F);CHECK,N_PINB(d),P_PINB(g)
      • Vars
        • B(d);N_GUARD,N_SPINB(g),P_SPINB(d)::B(D),XB(d)
      • Refutation
        • S(i);P_SPINS(i)
    • Try
      • S(F);CHECK
      • Vars
        • S(i);P_SPINS(i),S_CUTR(b)::R(G)
      • Refutation
        • R(b);XB(D)
  • Actual
    • R(G);P_PINS(i)
    • Threat
      • R1(G),XS(i)
    • Vars
      • P(e);CHECK,S_CUTR(b)::B(D)+S(F)
      • P(e);CHECK,N_GUARD,S_CUTR(c)::S(C)
      • K(h);N_SPINB(d),N_SPINS(i),S_FLIGHT::R1(G),XS(i)
      • P(f);S_CUTR(b)::B(D)+S(F),XS(i)
      • P(f);N_GUARD,S_CUTR(c)::QAR2(A),XB(d)
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).