MESON Chess Problem Database

Problem Display
PID: 19002 (5RK1/8/3k4/3P4/Q7/4N3/P7/8 w - - 0 1)

Billi, L

L'Italia Scacchistica, 1911

5RK1/8/3k4/3P4/Q7/4N3/P7/8

#2

6 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qf4#
    • 1...Kc7
      • 2.Qc6#
    • 1...Ke7
      • 2.Sf5#
  • Tries
    • 1.Kg7?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc7
        • 2.Qc6#
      • 1...Ke7
        • 2.Sf5#
      • 1...Kc5!
    • 1.Rf7?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc5!
    • 1.Re8?
      • threat
        • 2.Qc6#
      • 1...Kc7
        • 2.Qc6#
      • 1...Kc5!
    • 1.Qb5?
      • 1...Kc7
        • 2.Qc6#
      • 1...Ke7
        • 2.Sf5#
      • 1...Ke5!
    • 1.Qc6+?
      • 1...Ke7
        • 2.Sf5#
        • 2.Re8#
        • 2.Qe6#
        • 2.Qc7#
      • 1...Ke5!
    • 1.Qe8?
      • 1...Kc7
        • 2.Qc6#
      • 1...Kc5!
    • 1.Qc4?
      • 1...Ke5
        • 2.Qf4#
      • 1...Ke7
        • 2.Qc7#
      • 1...Kd7!
    • 1.Qa5?
      • 1...Kd7
        • 2.Qd8#
      • 1...Ke7
        • 2.Qc7#
        • 2.Qd8#
      • 1...Ke5!
  • Keys
    • 1.a3!
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kc7
        • 2.Qc6#
      • 1...Ke7
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(C)
    • K(a);S_FLIGHT::QAR1(C)
    • K(a);S_FLIGHT::S(B)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::S(B)
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