MESON Chess Problem Database

Problem Display
PID: 287199 (2B2K2/NPP5/nBpk4/5Rp1/1pp1P1P1/5n2/2QP4/5b2 w - - 0 1)

Heyl, Peter

Problem-Forum, 2008

2B2K2/NPP5/nBpk4/5Rp1/1pp1P1P1/5n2/2QP4/5b2

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Rf6#
    • 1...Sxc7
      • 2.Bc5#
    • 1...Sb8
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...c5
      • 2.Rd5#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qxc6#
      • 1...Se5
        • 2.Rf6#
      • 1...Sb8
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...c5
        • 2.Rd5#
        • 2.Qc6#
        • 2.Qd7#
      • 1...Sd4!
    • 1.Qxc4?
      • threat
        • 2.Qe6#
        • 2.Qxc6#
      • 1...Sxc7
        • 2.Bc5#
        • 2.Qc5#
        • 2.Qxc6#
      • 1...Sd4
        • 2.Qxd4#
        • 2.e5#
      • 1...Se5
        • 2.Rf6#
        • 2.Qe6#
        • 2.Qd4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb8
        • 2.Qe6#
        • 2.Qc5#
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...c5
        • 2.Rd5#
        • 2.Qd5#
        • 2.Qe6#
      • 1...Bxc4!
  • Keys
    • 1.d4!
      • threat
        • 2.Rf6#
      • 1...Sxd4
        • 2.Qh2#
      • 1...Sxc7
        • 2.Bc5#
      • 1...cxd4 ep
        • 2.Qxc6#
      • 1...Sc5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);SBLOCK::R(E)
    • S(f);N_GUARD,SBLOCK,XP(I)::B(F)
    • S(f);OGATE::PXS(f)=Q
    • P(g);N_GUARD::R1(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(g)
      • Vars
        • S(b);SBLOCK::R(E)
        • S(f);OGATE::PXS(f)=Q
      • Refutation
        • S(b);
    • Try
      • Q(A);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);N_GUARD::QAB1(A),XS(f)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • P(B);
    • Threat
      • R(E)
    • Vars
      • S(b);N_GUARD,XP(B)::QAB(A)
      • S(f);N_GUARD,SBLOCK,XP(I)::B(F)
      • P(d);EP,OGATE,XP(B)::QAR1(A),XP(g)
      • S(f);OGATE::P(B),XS(f)
HTML5 logo

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).