MESON Chess Problem Database

Problem Display
PID: 221670 (8/8/4K3/3p4/4k3/5p2/1b1B4/5Q2 w - - 0 1)

McDowell, Michael

The Problemist, 1987

8/8/4K3/3p4/4k3/5p2/1b1B4/5Q2

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qb1#
  • Tries
    • 1.Qxf3+?
      • 1...Kd4
        • 2.Qxd5#
      • 1...Kxf3!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qxd5#
      • 1...Bd4
        • 2.Qb1#
      • 1...d4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(A),XP(d)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(d)
    • Vars
      • K(c);P-FLIGHT::QAR1(A),XP(d)
      • B(a);OGATE,SBLOCK::QAB(A)
      • P(d);OGATE,SBLOCK::QAB1(A)
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