MESON Chess Problem Database

Problem Display
PID: 219468 (1B6/5B2/2k5/K7/8/8/8/Q7 w - - 0 1)

Nikitin, Vladimir V

Schach-Report, 1991

1B6/5B2/2k5/K7/8/8/8/Q7

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qc3#
  • Tries
    • 1.Ka6?
      • 1...Kc5
        • 2.Qc3#
      • 1...Kd7!
    • 1.Be6?
      • 1...Kc5
        • 2.Qc3#
      • 1...Kb7!
    • 1.Qb2?
      • threat
        • 2.Qb5#
      • 1...Kc5
        • 2.Qc3#
        • 2.Qb6#
      • 1...Kd7!
    • 1.Qc3+?
      • 1...Kd7
        • 2.Qc7#
      • 1...Kb7!
    • 1.Qe5?
      • threat
        • 2.Qc7#
        • 2.Qb5#
        • 2.Qd5#
      • 1...Kd7
        • 2.Qc7#
        • 2.Qe8#
      • 1...Kb7!
    • 1.Qb1?
      • threat
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb6#
      • 1...Kd7!
    • 1.Qc1+?
      • 1...Kd7
        • 2.Qc7#
      • 1...Kb7!
    • 1.Qd1?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qd5#
        • 2.Qd6#
      • 1...Kb7!
    • 1.Qe1?
      • 1...Kc5
        • 2.Qc3#
      • 1...Kd7
        • 2.Qe8#
      • 1...Kb7!
    • 1.Qh1+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Kd7!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kb7!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qc8#
      • 1...Kc5
        • 2.Qc3#
      • 1...Kb7
        • 2.Bd5#
      • 1...Kd7
        • 2.Qe8#

Anticipated by 157611(1986)

This anticipates 105387(1992), 245997(2009)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-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
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::B(C)
      • K(a);S_FLIGHT::QAB1(A)
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