MESON Chess Problem Database

Problem Display
PID: 154953 (8/4nQ1K/8/1Nb1p2N/4k3/6R1/1B6/3rn3 w - - 0 1)

Grabowski, Kazimierz

Good Companions (May Meredith Ty.), 1916

8/4nQ1K/8/1Nb1p2N/4k3/6R1/1B6/3rn3

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc3#
    • 1...Bd4
      • 2.Sd6#
    • 1...Sc2
      • 2.Qf3#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sd5
      • 2.Qg6#
  • Tries
    • 1.Qc4+?
      • 1...Kf5
        • 2.Qg4#
      • 1...Bd4
        • 2.Sd6#
      • 1...Rd4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Re3#
      • 1...Rxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sd6#
      • 1...exd4
        • 2.Qe6#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Rd3
        • 2.Rg4#
      • 1...Sc2
        • 2.Qf3#
      • 1...Sg2
        • 2.Qf3#
      • 1...Sd5
        • 2.Qg6#
      • 1...Sf5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::S(C)
    • B(d);N_GUARD,S_CUTR(a)::S(C)
    • S(b);N_GUARD::QAB1(E)
    • S(b);N_GUARD::QAB1(E),XS(b)
    • S(f);N_GUARD,SBLOCK::QAB(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(E)
        • B(d);P_SPINB(d)::S(C)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • B(A);
    • Threat
      • R1(B)
    • Vars
      • R(a);SBLOCK,XB(A)::S(C)
      • B(d);N_GUARD,SBLOCK,XB(A)::S(C)
      • P(e);OGATEB,XB(A)::QAR2(E)
      • S(b);N_GUARD::QAB1(E),XS(b)
      • R(a);SBLOCK::R(B)
      • S(b);N_GUARD::QAB1(E)
      • S(f);N_GUARD,SBLOCK::QAB(E)
      • S(f);OGATE,SBLOCK::QAB(E)
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).