MESON Chess Problem Database

Problem Display
PID: 102044 (8/2Q5/4NR2/3kN3/K1p2n2/b4P2/1pn5/8 w - - 0 1)

Godbout, Alain J

Hlas l'udu, 1991

8/2Q5/4NR2/3kN3/K1p2n2/b4P2/1pn5/8

#2

6 + 6

6490 yacpdb 2009
3713 Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Qxc5#
    • 1...Sb4
      • 2.Qc5#
    • 1...Sd4
      • 2.Sxf4#
  • Tries
    • 1.Qa5+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kd6!
    • 1.Qb7+?
      • 1...Kd6
        • 2.Sxc4#
        • 2.Sf7#
      • 1...Kxe5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qc6#
      • 1...Kxe6
        • 2.Qd7#
      • 1...Sxe6
        • 2.Sc6#
      • 1...Bd6
        • 2.Qxc4#
      • 1...Sb4
        • 2.Qd7#
      • 1...Sd4
        • 2.Sxf4#

Anticipated by 271479(1903)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::QAR1(F),XB(c)
    • S(b);S_CUTB(c)::QAR1(F)
    • S(b);SBLOCK::S(D),XS(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(F),XB(c)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(f);P-FLIGHT,XS(C)
  • Actual
    • R(E);
    • Threat
      • QAB1(F)
    • Vars
      • K(f);S_FLIGHT,XS(D)::QAB1(F)
      • S(e);SBLOCK,XS(D)::R(E)+S(C)
      • B(c);SBLOCK::QAB1(F),XP(d)
      • S(b);S_CUTB(c)::QAR2(F)
      • S(b);SBLOCK::S(D),XS(e)
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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).