MESON Chess Problem Database

Problem Display
PID: 132517 (1B6/8/8/7B/4k3/2K5/2b4p/Q7 w - - 0 1)

Lincoln, Robert A

Kozhakin-50 JT, 2007

1B6/8/8/7B/4k3/2K5/2b4p/Q7

#2

4 + 3

145 StrateGems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qe1#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qe5#
      • 1...Kd5!
    • 1.Qe1+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Kd5!
    • 1.Qh1+?
      • 1...Ke3
        • 2.Qf3#
        • 2.Qe1#
      • 1...Kf5!
    • 1.Qa8+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kf5!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qe6#
      • 1...Ke3
        • 2.Qe2#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg6#
      • 1...Bb3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • K(c);S_FLIGHT::QAB1(A)
      • B(a);N_GUARD::QAB1(A)
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