MESON Chess Problem Database

Problem Display
PID: 227426 (1N1Q4/3B1R2/5p2/3KpPP1/3p1k1b/3P1PNP/PP2P1pR/6B1 w - e5 0 1)

Fasano, Alessandro

Best Problems, 2020

1N1Q4/3B1R2/5p2/3KpPP1/3p1k1b/3P1PNP/PP2P1pR/6B1

#2

16 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg5
      • 2.Sh5#
    • 1...fxg5
      • 2.Sh5#
  • Tries
    • 1.Qxf6?
      • threat
        • 2.Sh5#
      • 1...Kxg3
        • 2.Qxe5#
      • 1...Bxg3!
    • 1.Qc7?
      • 1...Kxg5
        • 2.Qc1#
      • 1...Bxg3
        • 2.Qc1#
      • 1...Bxg5
        • 2.Sh5#
      • 1...fxg5
        • 2.Sh5#
        • 2.Qxe5#
      • 1...Kxg3!
  • Keys
    • 1.fxe5 ep!
      • 1...Kxg3
        • 2.Qc7#
      • 1...Kxg5
        • 2.Qxf6#
      • 1...Bxg3
        • 2.Qxf6#
      • 1...Bxg5
        • 2.Qc7#
      • 1...f5
        • 2.Sh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK,XP(L)::S(H)
    • P(f);XP(L)::S(H)
  • Tries
    • Try
      • Q(P);XP(f)
      • Threat
        • S(H)
      • Vars
        • K(c);S_FLIGHT,XS(H)::QAB(P),XP(e)
      • Refutation
        • B(d);XS(H)
    • Try
      • Q(P);P_PINP(e)
      • Vars
        • K(c);N_SPINP(e),S_FLIGHT,XP(L)::QAB(P)
        • B(d);SBLOCK,XS(H)::QAB(P)
        • B(d);SBLOCK,XP(L)::S(H)
      • Refutation
        • K(c);S_FLIGHT,XS(H)
  • Actual
    • P(K);EP,P_PINP(f),XP(e)
    • Vars
      • K(c);N_SPINP(f),S_FLIGHT,XS(H)::QAB(P)
      • K(c);S_FLIGHT,XP(L)::QAB1(P),XP(f)
      • B(d);SBLOCK,XS(H)::QAR2(P),XP(f)
      • B(d);SBLOCK,XP(L)::QAB(P)
      • P(f);::S(H)
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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).