MESON Chess Problem Database

Problem Display
PID: 137981 (2nrNn1b/1KpkP3/1prp4/5R2/4P1NB/7B/8/8 w - - 0 1)

Piatesi, Antonio

1st Prize=, Due Alfieri, 1979

2nrNn1b/1KpkP3/1prp4/5R2/4P1NB/7B/8/8

#2

8 + 9

56 The Problemist 1980
14744 Nuova Antologia dei Problemisti Italiani 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.exf8S#
    • 1...Kxe8
      • 2.exd8Q#
      • 2.exd8R#
  • Tries
    • 1.Se5+?
      • 1...Ke6
        • 2.Rh5#
        • 2.exd8S#
        • 2.exf8S#
      • 1...Kxe8
        • 2.Rxf8#
        • 2.exd8Q#
        • 2.exd8R#
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Bxe5
        • 2.Rxf8#
      • 1...dxe5!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Sgf6#
      • 1...Ke6
        • 2.exd8S#
      • 1...Kxe8
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Bf6
        • 2.Sgxf6#
      • 1...Se6
        • 2.exd8Q#
        • 2.exd8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::PXS(h)=S
    • K(e);S_FLIGHT,XS(H)::PXR(g)=Q
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(i);XS(C)::B(A)+R(E),XS(h)
      • Refutation
        • P(c);XS(C)
  • Actual
    • R(E);
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • K(e);S_FLIGHT::PXR(g)=S
      • K(e);S_FLIGHT,XS(H)::PXS(h)=Q
      • B(i);::B(A)+S(C),DCHECK,XB(i)
      • S(h);SBLOCK::PXR(g)=Q
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