MESON Chess Problem Database

Problem Display
PID: 146042 (8/2K1B1pr/1pQ1NPbp/4k1b1/R2N2rp/4p3/2p4q/8 w - - 0 1)

Janet, Frank

Good Companions (January), 1918

8/2K1B1pr/1pQ1NPbp/4k1b1/R2N2rp/4p3/2p4q/8

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qb5#
      • 2.Qd6#
    • 1...Bxf6
      • 2.Bd6#
    • 1...Be4
      • 2.Qd6#
    • 1...Bf5
      • 2.Sf3#
  • Tries
    • 1.Ra5+?
      • 1...b5
        • 2.Rxb5#
      • 1...bxa5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sxg6#
      • 1...Kxf4
        • 2.Bd6#
      • 1...Qxf4
        • 2.Qe6#
      • 1...Rxf4
        • 2.Qe6#
      • 1...Bxf4
        • 2.Qe6#
      • 1...Bxf6
        • 2.Bd6#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Be4
        • 2.Qd6#
      • 1...Bf5
        • 2.Sf3#
      • 1...Bh5
        • 2.Sd3#
      • 1...Bf7
        • 2.Sd3#
      • 1...Be8
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK,XP(E)::B(G)
    • B(i);SBLOCK::QAB1(C)
    • B(i);SBLOCK::S(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • P(h);P_SPINP(h)::R(A),XP(h)
      • Refutation
        • P(h);XR(A)
  • Actual
    • S(D);
    • Threat
      • S(D),XB(i)
    • Vars
      • K(f);S_FLIGHT,XS(D)::B(G)
      • Q(b);SBLOCK,XS(D)::QAR1(C)
      • R(d);SBLOCK,XS(D)::QAR1(C)
      • B(g);SBLOCK,XS(D)::QAR1(C)
      • B(g);SBLOCK,XP(E)::B(G)
      • B(i);N_GUARD::S(D),XB(i)
      • B(i);SBLOCK::QAB1(C)
      • B(i);SBLOCK::S(B)
      • B(i);N_GUARD::S(D)
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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).