MESON Chess Problem Database

Problem Display
PID: 18967 (1b4R1/5n1K/4p3/5k2/8/1N2B3/3N4/Q7 w - - 0 1)

Oudot, Jean

Themes-64, 1959

1b4R1/5n1K/4p3/5k2/8/1N2B3/3N4/Q7

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5+
      • 2.Rxg5#
    • 1...Sd6
      • 2.Rg5#
    • 1...Sh6
      • 2.Rg5#
    • 1...Sd8
      • 2.Rg5#
    • 1...Sh8
      • 2.Rg5#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Sd4#
      • 1...Sg5+
        • 2.Qxg5#
      • 1...e5
        • 2.Qg6#
        • 2.Qxf7#
      • 1...Be5
        • 2.Qg6#
      • 1...Ba7!
    • 1.Qf1+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Ke5!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Qf6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Be5
        • 2.Qb1#
      • 1...Se5
        • 2.Sd4#
      • 1...e5
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(c);CHECK,N_GUARD::R1(F),XS(c)
    • S(c);N_GUARD::R1(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • S(c);CHECK,N_GUARD::QAR1(A),XS(c)
        • B(d);SBLOCK::QAB1(A)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR1(A),XB(d)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(F);
    • Threat
      • QAR1(A)
    • Vars
      • S(c);CHECK,N_GUARD::R1(F),XS(c)
      • B(d);SBLOCK::QAB(A)
      • S(c);SBLOCK::S(C)
      • P(b);SBLOCK,S_CUTB(d)::QAR(A)
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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).