MESON Chess Problem Database

Problem Display
PID: 135574 (1Q6/8/8/N4p2/4k3/8/2N4B/5K2 w - - 0 1)

Chepizhni, Viktor Ivanovich

1st Prize, Zheltonozhko JT, 2006

1Q6/8/8/N4p2/4k3/8/2N4B/5K2

#2

5 + 2

145 StrateGems 2008
145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qf4#
    • 1...Kd5
      • 2.Qe5#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qe5#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kd5
        • 2.Qe5#
      • 1...f4!
    • 1.Se1?
      • threat
        • 2.Qe5#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...f4!
    • 1.Qg3?
      • 1...Kd5
        • 2.Qe5#
      • 1...f4!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qe5#
        • 2.Qc4#
        • 2.Qxf5#
      • 1...Kd3!
    • 1.Qe5+?
      • 1...Kf3
        • 2.Qf4#
        • 2.Qe2#
        • 2.Qxf5#
      • 1...Kd3!
    • 1.Qd6?
      • 1...Kf3
        • 2.Qf4#
      • 1...f4!
    • 1.Qb4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kd3!
    • 1.Qb5?
      • 1...Kf3
        • 2.Qe2#
        • 2.Qxf5#
      • 1...f4!
    • 1.Qe8+?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd5
        • 2.Qc6#
        • 2.Qe5#
      • 1...Kd3!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qf4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kf3
        • 2.Qf4#
      • 1...Kd4
        • 2.Qe5#
      • 1...f4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR1(E)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • S(B);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(E)
    • Vars
      • K(a);P-FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAR1(E)
      • P(b);::QAR1(E),XP(b)
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