MESON Chess Problem Database

Problem Display
PID: 78375 (5B2/8/2p5/3k4/3p1K2/3Q4/1P6/3b4 w - - 0 1)

Lincoln, Robert A

5th HM., The Problemist, 1988

5B2/8/2p5/3k4/3p1K2/3Q4/1P6/3b4

#2

4 + 4

6329 Australian Chess 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qf5#
    • 1...Bb3
      • 2.Qxb3#
    • 1...Bf3
      • 2.Qb3#
    • 1...Bg4
      • 2.Qb3#
    • 1...Bh5
      • 2.Qb3#
  • Keys
    • 1.b3!
      • threat
        • 2.Qc4#
        • 2.Qe4#
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Bxb3
        • 2.Qxb3#
      • 1...c5
        • 2.Qe4#
      • 1...Bc2
        • 2.Qc4#
      • 1...Be2
        • 2.Qe4#
        • 2.Qf5#
      • 1...Bf3
        • 2.Qc4#
        • 2.Qf5#
      • 1...Bg4
        • 2.Qc4#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(c);N_SPINP(b),S_FLIGHT::QAB1(B)
    • B(a);N_GUARD::QAB(B),XB(a)
    • B(a);N_GUARD::QAB(B)
  • Actual
    • P(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(c);N_SPINP(b),S_FLIGHT::QAB1(B)
      • B(a);OGATE,XP(A)::QAB(B),XB(a)
      • P(d);::QAB1(B)
      • B(a);::QAB1(B)
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