MESON Chess Problem Database

Problem Display
PID: 260746 (1q6/5NPp/2Q1np1K/3n1kpR/3r1PN1/4P3/4P1BP/5RB1 w - - 0 1)

Piatesi, Antonio

2nd Prize, Neue Zurcher Zeitung, 1982

1q6/5NPp/2Q1np1K/3n1kpR/3r1PN1/4P3/4P1BP/5RB1

#2

13 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxg4
      • 2.Bh3#
    • 1...Sxe3
      • 2.Sxe3#
    • 1...Sxf4
      • 2.Qd7#
  • Tries
    • 1.Sd6+?
      • 1...Kxg4
        • 2.Bf3#
        • 2.Bh3#
      • 1...Qxd6!
    • 1.e4+?
      • 1...Kxg4
        • 2.Bh3#
      • 1...Rxe4!
  • Keys
    • 1.Bh3!
      • threat
        • 2.Sf2#
      • 1...Ke4
        • 2.Sxf6#
      • 1...Qxf4
        • 2.Sd6#
      • 1...Rxf4
        • 2.Qc2#
      • 1...Sxe3
        • 2.Sxe3#
      • 1...Sdxf4
        • 2.Sge5#
      • 1...Sexf4
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(d),OGATEB,S_FLIGHT,XS(H)::B(D)
    • S(b);XP(F)::S(H),XS(b)
    • S(e);OGATEB,P_SPINS(e),XP(G)::QAB(J)
  • Tries
    • Try
      • S(L);CHECK
      • Refutation
        • Q(h);XS(L)
    • Try
      • P(F);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(d),S_CUTR(a),S_FLIGHT,XS(H)::B(D)
      • Refutation
        • R(a);XP(F)
  • Actual
    • B(D);
    • Threat
      • B(D)+S(H)
    • Vars
      • K(c);N_GUARD,N_SPINP(d),P_SPINS(b),S_FLIGHT::S(H),XP(f)
      • Q(h);N_GUARD,P_SPINQ(h),XP(G)::S(L)
      • R(a);N_GUARD,P_SPINR(a),XP(G)::QAB(J)
      • S(b);XP(F)::B(D)+S(H),DCHECK,XS(b)
      • S(b);P_SPINS(b),XP(G)::B(D)+S(H)
      • S(e);P_SPINS(e),XP(G)::B(D)+S(H),XP(f)
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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).