MESON Chess Problem Database

Problem Display
PID: 75978 (4R3/8/4B3/8/1rN4K/8/1q2kp1B/Q7 w - - 0 1)

O'Doherty, Father

The Tablet, 1920

(First published on Sat Dec 4 1920)

4R3/8/4B3/8/1rN4K/8/1q2kp1B/Q7

#2

6 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Bd5#
  • Tries
    • 1.Bf5+?
      • 1...Kf3
        • 2.Qh1#
      • 1...Qe5!
  • Keys
    • 1.Qf1+!
      • 1...Kxf1
        • 2.Bh3#
      • 1...Kf3
        • 2.Bg4#
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::B(E)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(b);S_FLIGHT,XQ(A)::B(E)
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