MESON Chess Problem Database

Problem Display
PID: 78902 (2r1q1bb/1N5p/p6r/P3n1Qp/2k1P1n1/RRN1P3/K3P3/B4B2 w - - 0 1)

Commandeur, Henri

L'Echiquier de Paris, 1951

2r1q1bb/1N5p/p6r/P3n1Qp/2k1P1n1/RRN1P3/K3P3/B4B2

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Rxa4#
    • 1...Qg6
      • 2.Ra4#
    • 1...Qf7
      • 2.Ra4#
    • 1...Qe6
      • 2.Ra4#
    • 1...Qd8
      • 2.Ra4#
    • 1...Rhc6
      • 2.Ra4#
    • 1...Rcc6
      • 2.Ra4#
    • 1...Sd3
      • 2.exd3#
    • 1...Sf3
      • 2.exf3#
    • 1...Sc6
      • 2.Qc5#
    • 1...Sg6
      • 2.Sd6#
    • 1...Sd7
      • 2.Ra4#
    • 1...Sf7
      • 2.Qd5#
  • Keys
    • 1.Sd1!
      • threat
        • 2.Sb2#
      • 1...Sxe3
        • 2.Sxe3#
      • 1...Sd3
        • 2.exd3#
      • 1...Sf3
        • 2.exf3#
      • 1...Sc6
        • 2.Qc5#
      • 1...Sg6
        • 2.Sd6#
      • 1...Sd7
        • 2.Ra4#
      • 1...Sf7
        • 2.Qd5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(i);N_GUARD,P_PINR(E)::R(E),XQ(i)
    • Q(i);N_GUARD::R(E)
    • R(f);S_CUTQ(i)::R(E)
    • R(h);S_CUTQ(i)::R(E)
    • S(c);OGATE::P(D),XS(c)
    • S(c);OGATE::B(B)+P(D),XS(c)
    • S(c);OGATE::QAR1(K)
    • S(c);S_CUTR(f)::S(L)
    • S(c);S_CUTQ(i)::R(E)
    • S(c);OGATE::QAB1(K)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • S(b);XP(H)::S(G),XS(b)
      • S(c);OGATE::P(D),XS(c)
      • S(c);OGATE::B(B)+P(D),XS(c)
      • S(c);OGATE::QAR1(K)
      • S(c);S_CUTR(f)::S(L)
      • S(c);S_CUTQ(i)::R(E)
      • S(c);OGATE::QAB1(K)
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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).