MESON Chess Problem Database

Problem Display
PID: 144141 (1b6/6K1/1B6/1P2k1N1/3N3P/1B6/1Q4n1/8 w - - 0 1)

McBride, RG

Brisbane Courier, 1919

(First published on Sat Aug 9 1919)

1b6/6K1/1B6/1P2k1N1/3N3P/1B6/1Q4n1/8

#2

8 + 3

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Bc7#
    • 1...Bc7
      • 2.Bxc7#
    • 1...Se1
      • 2.Qh2#
    • 1...Se3
      • 2.Qh2#
    • 1...Sxh4
      • 2.Qh2#
  • Tries
    • 1.Se2+?
      • 1...Kf5
        • 2.Be6#
      • 1...Kd6!
    • 1.Qe2+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Se3
        • 2.Qh2#
      • 1...Kf4!
  • Keys
    • 1.Be6!
      • 1...Kf4
        • 2.Se2#
      • 1...Kd6
        • 2.Sf5#
      • 1...Sxh4
        • 2.Qh2#
      • 1...Bd6
        • 2.Se2#
      • 1...Ba7
        • 2.Bc7#
      • 1...Bc7
        • 2.Bxc7#
      • 1...Se1
        • 2.Qh2#
      • 1...Se3
        • 2.Qh2#
      • 1...Sf4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::B(G)
    • B(c);N_GUARD::B(G),XB(c)
    • S(a);OGATE::QAB(A)
    • S(a);OGATE,XP(D)::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
        • S(a);OGATE,P_SPINS(a)::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(b);S_FLIGHT::S(C)
      • S(a);OGATE,XP(D)::QAB(A)
      • B(c);SBLOCK::QAB(A)+S(C)
      • B(c);N_GUARD::B(G)
      • B(c);N_GUARD::B(G),XB(c)
      • S(a);OGATE::QAB(A)
      • S(a);SBLOCK::QAB(A)+S(C)
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