MESON Chess Problem Database

Problem Display
PID: 259243 (8/3NKN2/8/8/4k3/4P3/2RB2R1/8 w - - 0 1)

Alpi, A

Pirrone, Santi

L'Italia Scacchistica, 1974

8/3NKN2/8/8/4k3/4P3/2RB2R1/8

#2

7 + 1

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sf6#
    • 1...Kf5
      • 2.Sd6#
  • Tries
    • 1.Sf6+?
      • 1...Kd3
        • 2.Rc3#
      • 1...Kf5
        • 2.Rc5#
        • 2.Rg5#
        • 2.e4#
      • 1...Kf3!
    • 1.Sg5+?
      • 1...Kd3
        • 2.Rc3#
      • 1...Kd5
        • 2.Rc5#
      • 1...Kf5!
    • 1.Sd6+?
      • 1...Kd3
        • 2.Rc3#
      • 1...Kd5
        • 2.Rc5#
        • 2.Rg5#
      • 1...Kf3!
    • 1.Rc1?
      • 1...Kd3
        • 2.Sc5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Kf5
        • 2.Sd6#
      • 1...Kf3!
    • 1.Rc3?
      • 1...Kd5
        • 2.Sf6#
      • 1...Kf5
        • 2.Sd6#
      • 1...Kf3!
    • 1.Rc4+?
      • 1...Kd3
        • 2.Sde5#
        • 2.Sfe5#
      • 1...Kd5
        • 2.Sb6#
      • 1...Kf5
        • 2.Sd6#
        • 2.Sh6#
        • 2.Rg5#
        • 2.Rf4#
        • 2.e4#
      • 1...Kf3!
    • 1.Rf2?
      • 1...Kd5
        • 2.Sf6#
      • 1...Kd3!
    • 1.Rg3?
      • 1...Kd5
        • 2.Sf6#
      • 1...Kf5
        • 2.Sd6#
      • 1...Kd3!
  • Keys
    • 1.Bc1!
      • 1...Kd3
        • 2.Sc5#
      • 1...Kf3
        • 2.Sg5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Kf5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::S(E)
    • K(a);N_GUARD,S_FLIGHT::S(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(E)
        • K(a);N_GUARD,S_FLIGHT::S(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(E)
        • K(a);N_GUARD,S_FLIGHT::S(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(E)
        • K(a);N_GUARD,S_FLIGHT::S(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::S(E)
      • K(a);N_GUARD,S_FLIGHT::S(G)
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