MESON Chess Problem Database

Problem Display
PID: 154908 (1Q6/1B2p3/p1NpP1R1/Rb5p/3Nk2K/4B3/2PP4/8 w - - 0 1)

McWilliam, Robert C

BCCA, 1943

1Q6/1B2p3/p1NpP1R1/Rb5p/3Nk2K/4B3/2PP4/8

#2

11 + 6

15393 McWilliam Scrapbook 2015

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qf4#
      • 2.Qe5#
  • Tries
    • 1.Sb4+?
      • 1...Ke5
        • 2.Sd3#
        • 2.Qh8#
      • 1...d5
        • 2.Bxd5#
        • 2.Qf4#
      • 1...Bc6!
    • 1.Sa7+?
      • 1...Ke5
        • 2.Qh8#
      • 1...d5
        • 2.Qf4#
      • 1...Bc6!
    • 1.Sxe7+?
      • 1...Ke5
        • 2.Sf3#
        • 2.Qh8#
      • 1...d5
        • 2.Bxd5#
        • 2.Qf4#
      • 1...Bc6!
    • 1.Sd8+?
      • 1...Ke5
        • 2.Sf7#
      • 1...d5
        • 2.Qf4#
      • 1...Bc6!
    • 1.Qf8?
      • threat
        • 2.Qf3#
        • 2.Qf5#
      • 1...Be2
        • 2.Qf4#
        • 2.Qf5#
      • 1...Kd5!
  • Keys
    • 1.Sf3!
      • 1...Kxf3
        • 2.Sd4#
      • 1...Kd5
        • 2.Sce5#
      • 1...Kf5
        • 2.Sxe7#
      • 1...Bxc6
        • 2.Sg5#
      • 1...Bf1
        • 2.Sg5#
      • 1...Be2
        • 2.Sg5#
      • 1...Bd3
        • 2.Sg5#
      • 1...Ba4
        • 2.Sg5#
      • 1...Bc4
        • 2.Sg5#
      • 1...d5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • S(G);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b),P_SPINP(e)::QAB(K)
        • P(e);OGATE,P_SPINP(e)::QAR1(K)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • S(G);CHECK,XP(f)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • S(G);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b),P_SPINP(e)::S(G)
        • P(e);OGATE,P_SPINP(e)::QAR1(K)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);P_SPINB(b),S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT,XS(D)::B(J)+S(G),DCHECK
      • K(a);P_SPINB(b),S_FLIGHT::B(J)+S(G)
      • K(a);P_SPINB(b),S_FLIGHT::S(G),XP(f)
      • B(b);P_SPINB(b),XS(G)::S(D)
      • B(b);::S(D)
      • P(e);OGATE,SBLOCK::QAR1(K)
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