MESON Chess Problem Database

Problem Display
PID: 22526 (1B6/5B2/8/8/4kp2/8/3K1P2/Q7 w - - 0 1)

Pikulik, Aleksandr Vasilevich

Znamya junosti, 1961

1B6/5B2/8/8/4kp2/8/3K1P2/Q7

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qe5#
  • Tries
    • 1.Bh5?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qe5#
      • 1...Kd5!
    • 1.Be6?
      • 1...f3
        • 2.Qe5#
        • 2.Qa4#
      • 1...Kf3!
    • 1.Qf6?
      • threat
        • 2.Qxf4#
      • 1...f3
        • 2.Qe5#
        • 2.Qf4#
      • 1...Kf3!
    • 1.Qg7?
      • 1...Kf5
        • 2.Qg6#
      • 1...f3
        • 2.Qe5#
        • 2.Qg4#
      • 1...Kf3!
    • 1.Qb1+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf3!
    • 1.Qa3?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf5!
    • 1.Qa4+?
      • 1...Kf5
        • 2.Qxf4#
      • 1...Kf3!
    • 1.Qa5?
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Qb4#
        • 2.Qd5#
        • 2.Qe5#
      • 1...Kf3!
    • 1.Qa6?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg6#
      • 1...Kf3!
    • 1.Qa8+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf5!
    • 1.f3+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Kxf3!
  • Keys
    • 1.Qg1!
      • 1...Kf3
        • 2.Bd5#
      • 1...Kd4
        • 2.f3#
      • 1...Kf5
        • 2.Qg6#
      • 1...f3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR1(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(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
      • P(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);P-FLIGHT::QAB(A)+P(C)
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);OGATEB::QAR2(A)
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