MESON Chess Problem Database

Problem Display
PID: 271952 (1n1bQ1bq/Rpk1N2R/4n3/P2KPB2/1N3B2/8/8/8 w - - 0 1)

Cowley, Norman

Sunday Referee, 1934

(First published on Sun Feb 4 1934)

1n1bQ1bq/Rpk1N2R/4n3/P2KPB2/1N3B2/8/8/8

#2

10 + 7

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5+
      • 2.Bxe5#
    • 1...Sg7+
      • 2.e6#
    • 1...Sa6
      • 2.Sxa6#
    • 1...Sc6
      • 2.Sa6#
    • 1...Sd7
      • 2.Sa6#
  • Tries
    • 1.Qd7+?
      • 1...Sxd7
        • 2.Sa6#
      • 1...Kxd7!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Sbd5#
      • 1...Sd4+
        • 2.Sed5#
      • 1...Sxf4+
        • 2.Sed5#
      • 1...Sc5+
        • 2.Sed5#
      • 1...Sg5+
        • 2.Sed5#
      • 1...Sg7+
        • 2.e6#
      • 1...Sf8+
        • 2.Sed5#
      • 1...Qxe5
        • 2.Bxe5#
      • 1...Sa6
        • 2.Sxa6#
      • 1...Sc6
        • 2.Sa6#
      • 1...Sd7
        • 2.Sa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(g);CHECK,OGATE,P_SPINQ(g),XP(E)::B(B),XQ(g)
    • S(a);CHECK,OGATE::B(B)+P(E)
    • S(d);N_GUARD::S(A),XS(d)
    • S(d);N_GUARD::S(A)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • S(d);SBLOCK,XQ(J)::S(A)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(a),XQ(J)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • S(A)
    • Vars
      • S(a);CHECK::R(I)+S(H),DCHECK
      • S(a);CHECK,XB(B)::R(I)+S(H),DCHECK
      • S(a);CHECK,OGATE::B(B)+P(E)
      • Q(g);OGATE,P_SPINQ(g),XP(E)::B(B),XQ(g)
      • S(d);N_GUARD::S(A),XS(d)
      • S(d);N_GUARD::S(A)
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