MESON Chess Problem Database

Problem Display
PID: 259370 (1B5K/7N/p1R2R2/N2k4/2n1p3/3nP3/8/b2Q4 w - - 0 1)

Pirrone, Santi

Scacchi e Scienze Applicate, 1994

1B5K/7N/p1R2R2/N2k4/2n1p3/3nP3/8/b2Q4

#2

8 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf6+
      • 2.Sxf6#
    • 1...Sb2
      • 2.Rf5#
    • 1...Se5
      • 2.Rfd6#
  • Tries
    • 1.Qh5+?
      • 1...Be5
        • 2.Qf7#
      • 1...Sce5
        • 2.Rfd6#
      • 1...Sde5!
    • 1.Qxd3+?
      • 1...Bd4
        • 2.Qxc4#
        • 2.Qxd4#
      • 1...exd3!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxc4#
      • 1...Bxf6+
        • 2.Sxf6#
      • 1...Sb2
        • 2.Rf5#
      • 1...Se5
        • 2.Rfd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);CHECK,XR(E)::S(F),XB(a)
    • S(c);N_PINR(E)::R(E)
    • S(c);N_PINR(E),SBLOCK::R1(E)
  • Tries
    • Try
      • Q(A);CHECK,N_PINS(b)
      • Vars
        • B(a);P_SPINB(a)::QAB(A)
        • S(c);N_PINR(E),P_SPINS(c)::R1(E)
      • Refutation
        • S(b);N_PINR(E),P_SPINS(b)
    • Try
      • Q(A);CHECK,XS(b)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);N_PINS(b),P_PINS(c)
    • Threat
      • QAB1(A),XS(c)
    • Vars
      • B(a);CHECK,XR(E)::S(F),XB(a)
      • S(b);N_PINR(E)::R(E)
      • S(b);N_PINR(E),SBLOCK::R1(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).