MESON Chess Problem Database

Problem Display
PID: 147073 (2B5/8/N7/2Bk4/8/Q7/K7/4n3 w - - 0 1)

Whitehead, Cyril

Australian Chess Problem Magazine, 1996

2B5/8/N7/2Bk4/8/Q7/K7/4n3

#2

5 + 2

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb3#
  • Tries
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qf5#
        • 2.Qd4#
      • 1...Kc6
        • 2.Qd7#
      • 1...Sxd3!
    • 1.Qe3?
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qb3#
      • 1...Kc6!
    • 1.Qf3+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke5
        • 2.Qf5#
      • 1...Sxf3!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Kc6
        • 2.Qd7#

Anticipated by 24215(1957), 176169(1960)

FEATURES

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