MESON Chess Problem Database

Problem Display
PID: 17918 (1B6/1Q1b4/1p1rp3/1R1qP3/1K2k3/2R2NbB/4Npr1/8 w - - 0 1)

McWilliam, Robert C

The Problemist, 1951

1B6/1Q1b4/1p1rp3/1R1qP3/1K2k3/2R2NbB/4Npr1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sg5#
    • 1...Qxb7
      • 2.Sg5#
    • 1...Rc6
      • 2.Sg5#
    • 1...Bxe5
      • 2.Sd2#
    • 1...Bxb5
      • 2.Qh7#
    • 1...Bc6
      • 2.Qh7#
    • 1...Bc8
      • 2.Qh7#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...Bxe5
        • 2.Sd2#
      • 1...f1S
        • 2.Sg5#
      • 1...Bh2
        • 2.Sd2#
      • 1...Bh4
        • 2.Sd2#
      • 1...Bc6
        • 2.Sg5#
        • 2.Qh7#
      • 1...Bf4!
    • 1.Qxd5+?
      • 1...Rxd5
        • 2.Sg5#
      • 1...exd5!
  • Keys
    • 1.Ka3!
      • threat
        • 2.Rb4#
      • 1...Qxb7
        • 2.Sg5#
      • 1...Bxe5
        • 2.Sd2#
      • 1...Bxb5
        • 2.Qh7#
      • 1...Qc6
        • 2.Sg5#
      • 1...Rc6
        • 2.Sg5#
      • 1...Bc6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(e);::S(C)
    • Q(e);N_SPINQ(e),XQ(H)::S(C)
    • R(g);N_SPINQ(e)::S(C)
    • B(c);SBLOCK,XP(G)::S(C)
    • B(i);OGATE,XR(F)::QAB(H)
    • B(i);N_SPINQ(e),OGATE::QAB(H)
    • B(i);OGATE::QAB(H)
  • Tries
    • Try
      • B(I);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XP(G)::S(C)
        • P(a);::S(C)
        • B(c);::S(C)
      • Refutation
        • B(c);
    • Try
      • Q(H);CHECK,XQ(e)
      • Vars
        • R(g);XQ(H)::S(C)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • R(F)
    • Vars
      • Q(e);N_SPINQ(e),XQ(H)::S(C)
      • B(c);SBLOCK,XP(G)::S(C)
      • B(i);OGATE,XR(F)::QAB(H)
      • Q(e);::S(C)
      • R(g);N_SPINQ(e)::S(C)
      • B(i);N_SPINQ(e),OGATE::QAB(H)
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