MESON Chess Problem Database

Problem Display
PID: 197454 (7b/7b/8/P1k2rR1/Pp2Q3/7K/7B/7B w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1944

(First published on Sun Mar 19 1944)

7b/7b/8/P1k2rR1/Pp2Q3/7K/7B/7B

#2

7 + 5

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...Bd4
      • 2.Qc6#
    • 1...Be5
      • 2.Qd5#
  • Tries
    • 1.Bg1+?
      • 1...Bd4
        • 2.Qc6#
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Rxf5+?
      • 1...Be5
        • 2.Qd5#
      • 1...Bxf5+!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Bd6#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Re5
        • 2.Bg1#
      • 1...Bd4
        • 2.Qb5#
      • 1...Be5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR1(E),XR(c)
    • B(e);SBLOCK::QAR1(E)
    • B(e);N_SPINR(c),S_CUTR(c)::QAR1(E)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
    • Try
      • R(G);CHECK,XR(c)
      • Vars
        • B(e);P_SPINB(e)::QAR1(E)
      • Refutation
        • B(d);CHECK,XR(G)
  • Actual
    • Q(E);
    • Threat
      • B(B)
    • Vars
      • R(c);N_GUARD::QAR1(E),XR(c)
      • R(c);S_CUTB(e)::B(B)
      • B(e);SBLOCK::QAR1(E)
      • B(e);N_SPINR(c),S_CUTR(c)::QAR1(E)
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