MESON Chess Problem Database

Problem Display
PID: 7857 (8/3B1p2/3p4/8/2k5/5K2/1B6/Q7 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1994

8/3B1p2/3p4/8/2k5/5K2/1B6/Q7

#2

4 + 3

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1+?
      • 1...Kd3
        • 2.Bb5#
        • 2.Bf5#
        • 2.Qc3#
      • 1...Kb4
        • 2.Qc3#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kb3!
    • 1.Qf1+?
      • 1...Kb4
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kd5
        • 2.Qb5#
      • 1...Kb3!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qb5#
        • 2.Qd4#
      • 1...Kd5
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qd4#
      • 1...Kd3!
    • 1.Qa5?
      • threat
        • 2.Qb5#
      • 1...Kd3
        • 2.Qc3#
      • 1...Kb3!
    • 1.Qa6+?
      • 1...Kb4
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kd5
        • 2.Qb5#
        • 2.Qc6#
      • 1...Kb3!
  • Keys
    • 1.Bf6!
      • 1...Kb3
        • 2.Qa4#
      • 1...Kd3
        • 2.Qc3#
      • 1...Kb4
        • 2.Qc3#
      • 1...Kc5
        • 2.Qd4#
      • 1...Kd5
        • 2.Qd4#
      • 1...d5
        • 2.Qc3#

Anticipated by 18925(1959), 103960(1993)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
        • K(a);OGATE,S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAR1(A)
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