MESON Chess Problem Database

Problem Display
PID: 85365 (1Q6/5Kp1/7k/7B/6PN/8/8/8 w - - 0 1)

Zheltonozhko, Vladimir Ivanovich

Probleemblad, 1991

1Q6/5Kp1/7k/7B/6PN/8/8/8

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qh8#
  • Tries
    • 1.Sf5+?
      • 1...Kh7
        • 2.Bg6#
        • 2.Qg8#
      • 1...Kg5!
    • 1.Qe5?
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...g5
        • 2.Qg7#
        • 2.Qh8#
      • 1...g6!
    • 1.Qd6+?
      • 1...Kg5
        • 2.Sf3#
      • 1...g6
        • 2.Qxg6#
      • 1...Kh7!
    • 1.Qb1?
      • threat
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...Kg5!
    • 1.Qf8?
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Kg5!
    • 1.Qg8?
      • threat
        • 2.Qxg7#
      • 1...g6
        • 2.Qxg6#
      • 1...g5
        • 2.Sf5#
        • 2.Qg6#
        • 2.Qg7#
        • 2.Qh8#
      • 1...Kg5!
  • Keys
    • 1.Sg6!
      • 1...Kg5
        • 2.Qf4#
      • 1...Kh7
        • 2.Qh8#

Anticipated by 11878(1973)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);SBLOCK::QAR2(E)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(B)
        • P(b);P_SPINP(b)::QAR1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(b);::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Threat
        • QAB1(E),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E),XP(b)
      • Vars
        • P(b);OGATE::QAR1(E),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::QAR1(E)
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