MESON Chess Problem Database

Problem Display
PID: 67387 (8/5R1N/2B5/4kN2/QpK5/b7/8/8 w - - 0 1)

Gamza, Grigory Stepanovich

Vecherni Novosibirsk, 1982

8/5R1N/2B5/4kN2/QpK5/b7/8/8

#2

6 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd6#
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke6
        • 2.Qd5#
      • 1...b3!
    • 1.Qb3?
      • threat
        • 2.Qe3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Ke6
        • 2.Kd4#
      • 1...Bc1!
    • 1.Qb5+?
      • 1...Ke6
        • 2.Sg5#
        • 2.Rf6#
        • 2.Re7#
        • 2.Qd5#
      • 1...Kf4!
    • 1.Qa5+?
      • 1...Ke6
        • 2.Sg5#
        • 2.Rf6#
        • 2.Re7#
        • 2.Qd5#
      • 1...Kf4!
    • 1.Qa7?
      • threat
        • 2.Qe3#
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke6
        • 2.Qe7#
      • 1...Bc1!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Ke6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT::QAR2(A)
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • K(c);P-FLIGHT::QAB(A)+K(B)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);S_FLIGHT::QAR2(A)
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);S_FLIGHT::QAR1(A)
      • K(c);P-FLIGHT::R1(E)
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