MESON Chess Problem Database

Problem Display
PID: 77647 (6K1/1B6/1p6/4k3/4N3/Q5P1/8/8 w - - 0 1)

Zurov, N

Snamya, 1983

6K1/1B6/1p6/4k3/4N3/Q5P1/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc3#
  • Tries
    • 1.Kf7?
      • 1...Kd4
        • 2.Qc3#
      • 1...b5
        • 2.Qc5#
      • 1...Kf5!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Bc8#
      • 1...bxc5!
    • 1.Qb3?
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5!
    • 1.Qf3?
      • threat
        • 2.Qf6#
      • 1...Kd4
        • 2.Qc3#
      • 1...Ke6!
  • Keys
    • 1.g4!
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Ke6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);N_GUARD::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::B(D)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
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