MESON Chess Problem Database

Problem Display
PID: 239803 (2nnBN2/2PPkbP1/q3PN2/pp5p/1P6/8/3Q4/3KR3 w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1931

2nnBN2/2PPkbP1/q3PN2/pp5p/1P6/8/3Q4/3KR3

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Sg8#
    • 1...Bg6
      • 2.Sg8#
    • 1...Bxe8
      • 2.Sg8#
    • 1...Bg8
      • 2.Sxg8#
    • 1...Sd6
      • 2.Sd5#
    • 1...Sxe6
      • 2.d8Q#
      • 2.d8B#
  • Tries
    • 1.Sg6+?
      • 1...Bxg6
        • 2.Sg8#
      • 1...Kxf6!
    • 1.exf7+?
      • 1...Qe6
        • 2.Sg8#
      • 1...Se6
        • 2.Sg8#
        • 2.d8Q#
        • 2.d8B#
      • 1...Kxf6!
    • 1.g8S+?
      • 1...Kxf8
        • 2.Qh6#
      • 1...Bxg8!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Se4#
      • 1...Qd6+
        • 2.Sd5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Qxe6
        • 2.dxc8S#
      • 1...Sxe6
        • 2.d8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • B(f);N_GUARD,P_SPINB(f),XP(E)::S(F)
    • B(f);N_GUARD::S(F)
    • B(f);N_GUARD,XB(J)::S(F)
    • B(f);N_GUARD::S(F),XB(f)
    • S(g);SBLOCK::S(F)
    • S(h);OGATE,P_SPINS(h),XP(E)::P=Q
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • B(f);XS(K)::S(F)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • P(E);CHECK,XB(f)
      • Vars
        • Q(d);P_SPINQ(d)::S(F)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • P(I);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(K)::QAB(C)
      • Refutation
        • B(f);XS(I)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+S(F)
    • Vars
      • Q(d);CHECK,SBLOCK::QAB(C)+S(F),DCHECK
      • K(e);S_FLIGHT::QAB1(C)
      • Q(d);N_GUARD,P_SPINQ(d),XP(E)::PXS(g)=S
      • S(h);OGATE,P_SPINS(h),XP(E)::P=Q
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