MESON Chess Problem Database

Problem Display
PID: 80153 (4R3/4bN2/8/3pNpn1/Qqp1kP2/3p1nK1/5BP1/8 w - - 0 1)

Boyer, Jean-Pierre

Nice-Matin, 1971

4R3/4bN2/8/3pNpn1/Qqp1kP2/3p1nK1/5BP1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.gxf3#
    • 1...Se6
      • 2.gxf3#
    • 1...Sxf7
      • 2.gxf3#
    • 1...Sh7
      • 2.gxf3#
    • 1...d2
      • 2.Qc2#
    • 1...d4
      • 2.Qc6#
  • Tries
    • 1.Sxg5+?
      • 1...Bxg5
        • 2.gxf3#
      • 1...Sxg5!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Scd6#
      • 1...Qxc4
        • 2.Sd6#
      • 1...Sxf7
        • 2.gxf3#
      • 1...dxc4
        • 2.Qc6#
      • 1...d2
        • 2.Qc2#
      • 1...d4
        • 2.Qc6#
      • 1...Qd6
        • 2.Sd2#
        • 2.Scxd6#
        • 2.Sfxd6#
      • 1...Sd4
        • 2.Sxg5#
      • 1...Se5
        • 2.Sd2#
      • 1...Se6
        • 2.gxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD::P(B),XS(b)
    • S(h);N_GUARD,XS(G)::P(B),XS(b)
    • P(a);OGATEB::QAB(D)
    • P(f);OGATEB::QAB(D)
  • Tries
    • Try
      • S(G);CHECK,XS(h)
      • Vars
        • B(i);XS(G)::P(B),XS(b)
      • Refutation
        • S(b);XS(G)
  • Actual
    • S(F);P_PINB(i),XP(d)
    • Threat
      • S(F)
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XS(F)::S(G)
      • S(h);N_GUARD,XS(G)::P(B),XS(b)
      • P(f);OGATEB,XS(F)::QAB(D)
      • P(a);OGATEB::QAB(D)
      • P(f);OGATEB::QAB(D)
      • S(b);N_GUARD::S(G),XS(h)
      • S(b);N_GUARD,N_SPINB(i)::S(F)
      • S(h);N_GUARD,N_SPINB(i)::P(B),XS(b)
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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).