MESON Chess Problem Database

Problem Display
PID: 48450 (nN3n2/P1kNP2R/Qp1bP3/2p1q3/2Rp1B2/4r3/4p3/4K3 w - - 0 1)

Haring, Jacobus

3rd Prize, Het Belgisch Schaakbord (L'Echiquier Belge), 1976-1977

nN3n2/P1kNP2R/Qp1bP3/2p1q3/2Rp1B2/4r3/4p3/4K3

#2

10 + 10

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qc6#
  • Tries
    • 1.Qxb6+?
      • 1...Kc8
        • 2.e8Q#
        • 2.e8R#
      • 1...Sxb6!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Qb7#
      • 1...Qxc5
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Bxc5
        • 2.exf8Q#
      • 1...Bxe7
        • 2.Sb7#
      • 1...bxc5
        • 2.Qc6#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Qd5
        • 2.exf8Q#
        • 2.exf8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE::QAR1(D)
  • Tries
    • Try
      • Q(D);CHECK,XP(f)
      • Vars
        • K(h);P-FLIGHT::P=Q
      • Refutation
        • S(i);XQ(D)
  • Actual
    • S(G);XP(d)
    • Threat
      • QAR1(D)
    • Vars
      • Q(e);N_GUARD,P_SPINB(g),P_SPINQ(e),XS(G)::PXS(j)=Q
      • B(g);N_GUARD,P_SPINB(g),P_SPINQ(e),XS(G)::PXS(j)=Q
      • B(g);N_GUARD,P_SPINB(g),P_SPINQ(e),XP(H)::R(B)+S(G)
      • P(f);OGATE,P_SPINP(f),XS(G)::QAR1(D)
      • Q(e);N_GUARD,P_SPINB(g)::R(B)+S(G),XQ(e)
      • Q(e);N_GUARD,P_SPINB(g)::PXS(j)=Q
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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).