MESON Chess Problem Database

Problem Display
PID: 270188 (8/1r1p2BK/r3k3/1p3N2/4p1Q1/3N1R2/8/b3R3 w - - 0 1)

Eddy, Edwin John

1st Prize, The Observer, 1958

(First published on Sun Oct 19 1958)

8/1r1p2BK/r3k3/1p3N2/4p1Q1/3N1R2/8/b3R3

#2

7 + 7

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qxe4#
  • Tries
    • 1.Qxe4+?
      • 1...Kf7
        • 2.Sd6#
        • 2.Sh6#
        • 2.Qe7#
        • 2.Qe8#
      • 1...Be5!
    • 1.Qg6+?
      • 1...Kd5
        • 2.Se3#
      • 1...Bf6!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Se3#
      • 1...d5+
        • 2.Sg7#
      • 1...d6+
        • 2.Se7#
      • 1...Kd5
        • 2.Qxe4#
      • 1...Kf6
        • 2.Qg6#
      • 1...Kf7
        • 2.Sd6#
      • 1...Bf6
        • 2.Qg8#
      • 1...e3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(e);N_GUARD,N_SPINP(b),S_CUTB(a),S_FLIGHT::QAB1(D),XP(b)
  • Tries
    • Try
      • Q(D);CHECK,XP(b)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINP(b),S_CUTB(a),S_FLIGHT::S(E)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(F);
    • Threat
      • QAB(D)+S(E)
    • Vars
      • P(g);CHECK,SBLOCK::QAB(D)+S(E),DCHECK
      • P(g);CHECK,SBLOCK::QAB(D)+S(E)
      • K(e);N_GUARD,N_SPINP(b),S_CUTB(a),S_FLIGHT::QAB1(D),XP(b)
      • K(e);N_GUARD,N_SPINP(b),P-FLIGHT,S_CUTB(a)::QAR1(D)
      • K(e);N_GUARD,N_SPINP(b),S_FLIGHT::R(C)+S(E),DCHECK
      • B(a);SBLOCK::QAB(D)
      • P(b);::QAB(D)+S(E),XP(b)
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