MESON Chess Problem Database

Problem Display
PID: 205591 (1b4q1/3n1B2/2p2pn1/R1p2k1p/7P/2N4P/2KQ4/4R3 w - - 0 1)

Woodward, LA

The Observer, 1953

(First published on Sun May 31 1953)

1b4q1/3n1B2/2p2pn1/R1p2k1p/7P/2N4P/2KQ4/4R3

#2

8 + 9

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Be6#
    • 1...Qg7
      • 2.Be6#
    • 1...Qc8
      • 2.Be6#
    • 1...Qd8
      • 2.Be6#
    • 1...Qf8
      • 2.Be6#
    • 1...Qh8
      • 2.Be6#
    • 1...Bf4
      • 2.Qd3#
      • 2.Qxd7#
  • Keys
    • 1.Se2!
      • threat
        • 2.Sd4#
      • 1...Ke4
        • 2.Sd4#
      • 1...Ke5
        • 2.Sg3#
      • 1...Be5
        • 2.Qd3#
      • 1...Sge5
        • 2.Qf4#
      • 1...Sde5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(i);N_GUARD::B(H)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::R(A)+S(D)
      • K(b);P-FLIGHT::R(A)+S(D)
      • B(h);N_SPINP(a),SBLOCK::QAB(C)
      • S(f);N_GUARD,N_SPINP(a),S_CUTB(h)::QAR1(C)
      • S(g);N_SPINP(a),S_CUTB(h)::S(D)
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