MESON Chess Problem Database

Problem Display
PID: 107072 (1R2Qn1q/3r4/4p3/p1BN4/k3Bn2/3N3p/3K4/8 w - - 0 1)

Boyer, Jean-Pierre

De Waarheid, 1969

1R2Qn1q/3r4/4p3/p1BN4/k3Bn2/3N3p/3K4/8

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2+
      • 2.Sxb2#
    • 1...Qc3+
      • 2.Sxc3#
    • 1...Qh4
      • 2.Sb2#
      • 2.Sc3#
    • 1...Qh5
      • 2.Sb2#
      • 2.Sc3#
    • 1...Qh6
      • 2.Sb2#
      • 2.Sc3#
    • 1...Qh7
      • 2.Sb2#
      • 2.Sc3#
    • 1...Qg8
      • 2.Sb2#
      • 2.Sc3#
    • 1...Sg6
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qxd7#
    • 1...e5
      • 2.Sb2#
      • 2.Sc3#
  • Tries
    • 1.Se5?
      • threat
        • 2.Bc2#
      • 1...Sd3
        • 2.Sc3#
      • 1...Qh7!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Bc6#
      • 1...Sd5
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(h);CHECK,N_GUARD::S(B),XQ(h)
    • Q(h);CHECK,N_GUARD::S(E),XQ(h)
    • S(g);N_GUARD::QAB(G),XR(f)
  • Tries
    • Try
      • S(B);P_SPINS(E)
      • Threat
        • B(C)
      • Vars
        • S(c);N_PINS(E)::S(E)
      • Refutation
        • Q(h);
  • Actual
    • S(E);P_SPINS(B)
    • Threat
      • B(C)
    • Vars
      • S(c);N_PINS(B)::S(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).