MESON Chess Problem Database

Problem Display
PID: 230279 (Q7/5p1p/6kP/8/4P3/6K1/8/2B5 w - - 0 1)

Kriuckov, Pavel

Vovnejko, Viktor Ivanovich

Zadachi i Etyudi, 2000

Q7/5p1p/6kP/8/4P3/6K1/8/2B5

#2

5 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Qe8#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qf5#
        • 2.Qg5#
      • 1...Kf6
        • 2.Qd6#
      • 1...f5
        • 2.Qxf5#
      • 1...f6!
    • 1.Qc6+?
      • 1...f6
        • 2.Qe8#
      • 1...Kh5!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...Kh5
        • 2.Qg4#
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...f6
        • 2.Qe8#
      • 1...Kf6!
    • 1.Qd8?
      • threat
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#
      • 1...f6
        • 2.Qe8#
      • 1...f5!
    • 1.Qe8?
      • 1...Kh5
        • 2.Qxf7#
      • 1...Kf6!
    • 1.Qg8+?
      • 1...Kh5
        • 2.Qxf7#
        • 2.Qg4#
        • 2.Qg5#
      • 1...Kf6!
  • Keys
    • 1.Qf8!
      • 1...Kh5
        • 2.Qxf7#
      • 1...Kf6
        • 2.Qd6#
      • 1...f6
        • 2.Qe8#
      • 1...f5
        • 2.Qxf5#

Anticipated by 187962(1910)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK::QAB(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);::QAB1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(b);::QAB1(E),XP(b)
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(E)
      • P(b);OGATEB,SBLOCK::QAB(E)
      • P(b);OGATE::QAB1(E),XP(b)
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