MESON Chess Problem Database

Problem Display
PID: 71547 (Q2B1k2/4NN1p/4PR2/1r1p4/B6p/6bK/8/6R1 w - - 0 1)

Cristoffanini, Guido

Comm., L'Italia Scacchistica, 1931

Q2B1k2/4NN1p/4PR2/1r1p4/B6p/6bK/8/6R1

#2

9 + 6

56 The Problemist 1938
102 Probleemblad 2006
102 Probleemblad 2007
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Sd6#
      • 2.Rg8#
    • 1...Bf2
      • 2.Sd6#
      • 2.Rg8#
    • 1...Bh2
      • 2.Sd6#
      • 2.Rg8#
    • 1...Bf4
      • 2.Sd6#
      • 2.Rg8#
    • 1...Be5
      • 2.Rg8#
    • 1...Bd6
      • 2.Sxd6#
      • 2.Rg8#
    • 1...Bc7
      • 2.Sd6#
      • 2.Rg8#
    • 1...Bb8
      • 2.Sd6#
      • 2.Rg8#
  • Tries
    • 1.Se5+?
      • 1...Ke8
        • 2.Bxb5#
      • 1...Kg7!
    • 1.Sg5+?
      • 1...Ke8
        • 2.Bxb5#
      • 1...Kg7!
    • 1.Sh6+?
      • 1...Ke8
        • 2.Bxb5#
      • 1...Kg7!
    • 1.Sh8+?
      • 1...Ke8
        • 2.Bxb5#
      • 1...Kg7!
    • 1.Bb6+?
      • 1...Kxe7
        • 2.Qd8#
      • 1...Kg7
        • 2.Qh8#
      • 1...Bb8!
    • 1.Bc7+?
      • 1...Kxe7
        • 2.Qd8#
      • 1...Kg7
        • 2.Qh8#
      • 1...Rb8!
    • 1.Rxg3?
      • threat
        • 2.Sd6#
        • 2.Rg8#
      • 1...Ke8
        • 2.Sd6#
        • 2.Rg8#
      • 1...Rb3
        • 2.Se5#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Sh8#
      • 1...hxg3!
    • 1.Rg6?
      • threat
        • 2.Rg8#
      • 1...Ke8
        • 2.Rg8#
      • 1...hxg6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Be7#
      • 1...Ke8
        • 2.Bc7#
      • 1...Kg8
        • 2.Bb6#
      • 1...Rb8
        • 2.S7h6#
      • 1...Bb8
        • 2.S7d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE::R1(A)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c)::B(C),XR(c)
      • Refutation
        • K(f);P_SPINB(a),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c)::B(C),XR(c)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c)::B(C),XR(c)
      • Refutation
        • K(f);P_SPINB(a),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c)::B(C),XR(c)
      • Refutation
        • K(f);P_SPINB(a),S_FLIGHT
    • Try
      • B(I);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(F)::QAB1(H)
        • K(f);OGATE,P_SPINB(a),S_FLIGHT::QAB1(H)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • B(I);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(F)::QAB1(H)
        • K(f);OGATE,P_SPINB(a),S_FLIGHT::QAB1(H)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(A);XB(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XR(A)
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c)::R(E)
      • Refutation
        • P(e);XR(E)
  • Actual
    • S(F);
    • Threat
      • QAR(H)+B(I),DCHECK
    • Vars
      • K(f);P-FLIGHT,P_SPINR(c)::QAR(H)+B(I)
      • K(f);P-FLIGHT,P_SPINB(a)::QAR(H)+B(I)
      • R(c);::R(E)+S(G)
      • B(a);::R(E)+S(G)
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