MESON Chess Problem Database

Problem Display
PID: 201475 (n3q3/pP6/Nk2pQ2/1P2K3/3NB3/8/1R6/R7 w - - 0 1)

Padulli, Giuseppe

2nd Prize, L'Italia Scacchistica, 1922

n3q3/pP6/Nk2pQ2/1P2K3/3NB3/8/1R6/R7

#2

9 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5+
      • 2.Rxb5#
    • 1...Qc6
      • 2.bxc6#
    • 1...Qg6
      • 2.bxa8S#
      • 2.b8Q#
      • 2.b8R#
    • 1...Qd7
      • 2.bxa8S#
    • 1...Qf7
      • 2.bxa8S#
    • 1...Qe7
      • 2.bxa8S#
    • 1...Qc8
      • 2.bxc8S#
  • Tries
    • 1.Qd8+?
      • 1...Sc7
        • 2.Qxc7#
        • 2.b8Q#
        • 2.b8R#
      • 1...Qxd8!
    • 1.Qxe6+?
      • 1...Qc6
        • 2.Qxc6#
        • 2.bxc6#
        • 2.b8Q#
        • 2.b8R#
      • 1...Qxe6+!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Qf2#
      • 1...Qxb5+
        • 2.Sec5#
      • 1...Qh5+
        • 2.Sg5#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Qb8+
        • 2.Sec7#
      • 1...Qc6
        • 2.bxc6#
      • 1...Qd7
        • 2.bxa8S#
      • 1...Qf7
        • 2.bxa8S#
      • 1...Qe7
        • 2.bxa8S#
      • 1...Qc8
        • 2.bxc8S#
      • 1...Qd8
        • 2.Sxd8#
      • 1...Qf8
        • 2.Sxf8#
      • 1...Qh8
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(e);CHECK,OGATE,P_SPINQ(e),XP(E)::R1(B),XQ(e)
    • Q(e);N_SPINP(b),OGATE::R(B)+P(E),XQ(e)
    • Q(e);N_GUARD::PXS(d)=S
    • Q(e);OGATE::PXQ(e)=S
  • Tries
    • Try
      • Q(H);CHECK,N_PINP(b)
      • Refutation
        • Q(e);XQ(H)
    • Try
      • Q(H);CHECK,P_SPINQ(H),XP(b)
      • Refutation
        • Q(e);CHECK,XQ(H)
  • Actual
    • S(C);P_SPINS(C),XP(b)
    • Threat
      • QAB(H)
    • Vars
      • Q(e);CHECK,N_PINS(C),P_SPINQ(e),XP(E)::QAR(H)+S(C)
      • Q(e);CHECK,N_PINS(C)::QAR(H)+S(C)
      • Q(e);CHECK,OGATE,P_SPINQ(e),XS(C)::QAR(H),XQ(e)
      • Q(e);N_PINS(C),OGATE::R(B)+P(E),XQ(e)
      • Q(e);N_GUARD,N_PINS(C)::PXS(d)=S
      • Q(e);N_GUARD::PXS(d)=S
      • Q(e);N_PINS(C),OGATE::PXQ(e)=S
      • Q(e);N_PINS(C)::QAR(H)+S(C),XQ(e)
      • Q(e);N_PINS(C),P_PINQ(H)::QAR(H)+S(C)
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