MESON Chess Problem Database

Problem Display
PID: 219913 (1b6/2nb4/1q6/5R2/2kP3R/1pNN4/1K1BP1B1/8 w - - 0 1)

Watney, Charles Gold

British Chess Magazine, 1924

1b6/2nb4/1q6/5R2/2kP3R/1pNN4/1K1BP1B1/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Rc5#
    • 1...Qa5
      • 2.d5#
    • 1...Qc5
      • 2.Rxc5#
      • 2.dxc5#
    • 1...Qb4
      • 2.Se5#
      • 2.d5#
    • 1...Qb5
      • 2.d5#
    • 1...Qa6
      • 2.Rc5#
      • 2.d5#
    • 1...Qc6
      • 2.d5#
    • 1...Qe6
      • 2.Rc5#
    • 1...Qf6
      • 2.Rc5#
    • 1...Qg6
      • 2.Rc5#
    • 1...Qh6
      • 2.Rc5#
    • 1...Qb7
      • 2.Rc5#
      • 2.d5#
    • 1...Sb5
      • 2.Bd5#
    • 1...Sd5
      • 2.Bxd5#
    • 1...Sa6
      • 2.Bd5#
    • 1...Se6
      • 2.Bd5#
    • 1...Sa8
      • 2.Bd5#
    • 1...Se8
      • 2.Bd5#
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sa3#
      • 1...Qxd4+
        • 2.Rxd4#
      • 1...Qxb5
        • 2.d5#
      • 1...Bxb5
        • 2.Se5#
      • 1...Sxb5
        • 2.Bd5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qa5
        • 2.Sd6#
        • 2.Rc5#
      • 1...Qa7
        • 2.Sd6#
      • 1...Qa6
        • 2.Rc5#
      • 1...Qd6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD,P_PINS(E),P_SPINQ(c),XP(G)::R1(I)
    • Q(c);N_GUARD::R(H)+P(G)
    • Q(c);N_GUARD::R1(I)
    • S(d);N_GUARD::B(D)
    • S(d);N_GUARD::B(D),XS(d)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XP(G)::R1(H),XQ(c)
      • Q(c);N_GUARD,SBLOCK,XS(E)::R(H)+P(G)
      • B(e);SBLOCK,XS(E)::S(F)
      • S(d);N_GUARD,SBLOCK,XS(E)::B(D)
      • Q(c);N_GUARD::R1(I),XQ(c)
      • Q(c);N_GUARD::S(E)
      • Q(c);N_GUARD::R1(I)
      • Q(c);N_GUARD::S(E),XQ(c)
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