MESON Chess Problem Database

Problem Display
PID: 174396 (3R4/4B3/1pNp1P1n/RKbk1P2/1n1pp3/N4p2/6Q1/8 w - - 0 1)

Viccari, Geraldo

Boletim da UBP, 1988

3R4/4B3/1pNp1P1n/RKbk1P2/1n1pp3/N4p2/6Q1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qxa2#
    • 1...Sd3
      • 2.Qa2#
    • 1...Sa6
      • 2.Qa2#
    • 1...Sxf5
      • 2.Qg8#
    • 1...Sg8
      • 2.Qxg8#
    • 1...e3
      • 2.Qxf3#
  • Tries
    • 1.Qg8+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sxg8!
  • Keys
    • 1.Bxd6!
      • threat
        • 2.Se7#
        • 2.Bxc5#
      • 1...Bxd6
        • 2.Kxb6#
      • 1...Sxc6
        • 2.Qa2#
      • 1...Sxf5
        • 2.Qg8#
      • 1...e3
        • 2.Qxf3#
      • 1...Sf7
        • 2.Se7#
      • 1...Sg8
        • 2.Bxc5#
        • 2.Qxg8#
      • 1...d3
        • 2.Bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAB(A),XS(b)
    • S(b);N_GUARD::QAB(A)
    • S(i);N_GUARD,XP(E)::QAB(A)
    • S(i);N_GUARD::QAB(A),XS(i)
    • P(d);N_SPINP(h),OGATEB,P_SPINP(a)::QAB(A),XP(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAB(A),XS(i)
      • Refutation
        • S(i);XQ(A)
  • Actual
    • B(H);XP(h)
    • Threat
      • DUALS(2)
    • Vars
      • B(e);P_SPINB(e),XB(H)::R(C)+K(D),XP(g)
      • S(b);N_GUARD,XS(F)::QAB(A)
      • S(i);N_GUARD,XP(E)::QAB(A)
      • P(d);OGATEB,P_SPINP(a)::QAB(A),XP(a)
      • S(i);::S(F)
      • P(c);::R(I)+B(H),XB(e)
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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).