MESON Chess Problem Database

Problem Display
PID: 174391 (7k/2n2KN1/2P5/6N1/8/6n1/8/2Q5 w - - 0 1)

Fleiuss, J Roxo

Boletim da UBP, 1988

7k/2n2KN1/2P5/6N1/8/6n1/8/2Q5

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sh1
      • 2.Qxh1#
    • 1...Se2
      • 2.Qh1#
    • 1...Se4
      • 2.Qh1#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qh7#
      • 1...Se4
        • 2.Qh1#
      • 1...Sf5!
    • 1.Qh1+?
      • 1...Sh5
        • 2.Qxh5#
      • 1...Sxh1!
    • 1.Qc2?
      • threat
        • 2.Qh7#
      • 1...Se4
        • 2.Qh2#
      • 1...Sf5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sf5#
        • 2.Sh5#
        • 2.S7e6#
        • 2.Se8#
      • 1...Sf5
        • 2.Sxf5#
      • 1...Se2
        • 2.Qh1#
      • 1...Se4
        • 2.Qh1#
      • 1...Sh5
        • 2.Sxh5#
      • 1...Sb5
        • 2.Qa8#
      • 1...Sd5
        • 2.Qa8#
      • 1...Se6
        • 2.S7xe6#
      • 1...Se8
        • 2.Sxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAR(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • DUALS(4)
    • Vars
      • S(a);::QAB(A)+S(E),XS(a)
      • S(a);N_GUARD::QAB(A)
      • S(b);N_GUARD::QAB1(A)
      • S(b);::QAB(A)+S(E),XS(b)
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).