MESON Chess Problem Database

Problem Display
PID: 27307 (8/1N1k4/6K1/4p1B1/8/8/8/2Q5 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

8/1N1k4/6K1/4p1B1/8/8/8/2Q5

#2

4 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qc6#
    • 1...Ke8
      • 2.Qc8#
  • Tries
    • 1.Kf6?
      • 1...Ke8
        • 2.Qc8#
      • 1...e4!
    • 1.Sd8?
      • threat
        • 2.Qc6#
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke8!
    • 1.Bh4?
      • 1...Ke6
        • 2.Qc6#
      • 1...Ke8
        • 2.Qc8#
      • 1...e4!
    • 1.Bf6?
      • 1...Ke6
        • 2.Qc6#
      • 1...Ke8
        • 2.Qc8#
      • 1...e4!
    • 1.Qc2?
      • 1...Ke6
        • 2.Qc6#
      • 1...Ke8
        • 2.Qc8#
      • 1...e4!
    • 1.Qc3?
      • 1...Ke6
        • 2.Qc6#
      • 1...Ke8
        • 2.Qc8#
      • 1...e4!
    • 1.Qc4?
      • 1...Ke8
        • 2.Qf7#
        • 2.Qc8#
      • 1...e4!
    • 1.Qc5?
      • 1...Ke6
        • 2.Qd6#
        • 2.Qc6#
      • 1...Ke8
        • 2.Qe7#
        • 2.Qc8#
      • 1...e4!
    • 1.Qc7+?
      • 1...Ke6
        • 2.Qd6#
        • 2.Qc6#
        • 2.Qf7#
      • 1...Ke8
        • 2.Qd8#
        • 2.Qe7#
        • 2.Qf7#
        • 2.Qc8#
      • 1...Kxc7!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Qc6#
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke6
        • 2.Qc6#
      • 1...Ke8
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • S(D);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAR2(A)
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