MESON Chess Problem Database

Problem Display
PID: 160609 (2k3N1/b7/2K5/1p6/8/2Q5/8/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2014

2k3N1/b7/2K5/1p6/8/2Q5/8/8

#2

3 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Se7+?
      • 1...Kb8
        • 2.Qh8#
      • 1...Kd8!
    • 1.Qg7?
      • threat
        • 2.Qf8#
        • 2.Qc7#
      • 1...Kb8
        • 2.Qf8#
        • 2.Qb7#
      • 1...Kd8
        • 2.Qf8#
        • 2.Qd7#
      • 1...Bc5
        • 2.Qc7#
      • 1...Bb8
        • 2.Qf8#
        • 2.Qd7#
      • 1...Bb6!
    • 1.Qh8?
      • threat
        • 2.Sf6#
        • 2.Sh6#
        • 2.Se7#
      • 1...Kb8
        • 2.Sf6#
        • 2.Sh6#
        • 2.Se7#
      • 1...Bb6
        • 2.Se7#
      • 1...Bd4
        • 2.Sf6#
        • 2.Se7#
      • 1...Bc5
        • 2.Se7#
      • 1...Kd8!
    • 1.Qa3?
      • threat
        • 2.Qf8#
      • 1...Kb8
        • 2.Qf8#
      • 1...Kd8
        • 2.Qf8#
      • 1...Bb6
        • 2.Qa8#
      • 1...Bc5
        • 2.Qa8#
      • 1...b4!
    • 1.Qh3+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kb8!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc7#
      • 1...Kb8
        • 2.Qd8#
      • 1...Bb6
        • 2.Qa8#
      • 1...Bb8
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);::QAR(A)+S(C),DCHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR(A)
        • K(c);P-FLIGHT::QAR2(A)
        • B(b);OGATE::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • B(b);OGATE::QAR2(A)
      • B(b);SBLOCK::S(C)
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