MESON Chess Problem Database

Problem Display
PID: 871 (8/8/2Np4/1K6/4k1p1/8/4BQ2/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 1993

8/8/2Np4/1K6/4k1p1/8/4BQ2/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qf5#
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Kb6?
      • 1...Kd5
        • 2.Qf5#
      • 1...g3
        • 2.Qf3#
      • 1...d5!
    • 1.Bd3+?
      • 1...Kd5
        • 2.Qa2#
        • 2.Qf5#
        • 2.Qf7#
      • 1...Kxd3!
    • 1.Bxg4?
      • threat
        • 2.Qd4#
        • 2.Qf3#
      • 1...Kd5
        • 2.Qd4#
        • 2.Qg2#
        • 2.Qf3#
        • 2.Qf5#
      • 1...Kd3!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Bc4#
        • 2.Qc4#
        • 2.Qf5#
      • 1...Kxf4!
    • 1.Qf6?
      • 1...Kd5
        • 2.Qf5#
      • 1...d5
        • 2.Qe5#
      • 1...g3
        • 2.Qf3#
      • 1...Ke3!
  • Keys
    • 1.Bd1!
      • 1...Kd3
        • 2.Qd4#
      • 1...Kd5
        • 2.Qf5#
      • 1...d5
        • 2.Bc2#
      • 1...g3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(B)
    • P(b);N_GUARD::QAB1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
        • P(b);N_GUARD::QAB1(B)
      • Refutation
        • P(c);
    • Try
      • B(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XB(A)
    • Try
      • B(A);XP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
        • P(c);N_GUARD::QAR1(B)
        • P(b);N_GUARD::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::QAR2(B)
      • P(c);SBLOCK::B(A)
      • P(b);N_GUARD::QAB1(B)
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