MESON Chess Problem Database

Problem Display
PID: 144774 (1Q6/2r1b3/2P1p1p1/R1N1k3/4N1P1/K3B2b/6B1/8 w - - 0 1)

Mackay, Donald

Bristol Times and Mirror, 1925

(First published on Sat Nov 21 1925)

1Q6/2r1b3/2P1p1p1/R1N1k3/4N1P1/K3B2b/6B1/8

#2

9 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sa6#
      • 2.Sb7#
      • 2.Sd7#
    • 1...Bxc5+
      • 2.Rxc5#
    • 1...Bg5
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sa6#
      • 2.Sb7#
      • 2.Sd7#
    • 1...Bf6
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sa6#
      • 2.Sb7#
      • 2.Sd7#
    • 1...Bd8
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sa6#
      • 2.Sb7#
      • 2.Sd7#
  • Tries
    • 1.Qxc7+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kd5!
    • 1.Qb4?
      • threat
        • 2.Sd3#
        • 2.Sd7#
        • 2.Qd4#
      • 1...Bxg4
        • 2.Sd3#
        • 2.Sd7#
      • 1...Bxc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Rd7
        • 2.Sd3#
        • 2.Sxd7#
      • 1...Kd5!
    • 1.Qh8+?
      • 1...Bf6
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Kd5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sce4#
      • 1...Kxd6
        • 2.Sb7#
      • 1...Kf6
        • 2.Qh8#
      • 1...Rxc6
        • 2.Sd7#
      • 1...Bxd6
        • 2.Qb2#
      • 1...Ra7
        • 2.Sd7#
      • 1...Rb7
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(f);CHECK,OGATE,P_SPINB(f),XS(G)::R(F),XB(f)
  • Tries
    • Try
      • Q(I);CHECK,XR(e)
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(I),XB(f)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(I);N_PINR(e),N_SPINS(G)
      • Threat
        • DUALS(3)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(I);CHECK,N_PINR(e)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(D);N_PINR(e),N_SPINS(G)
    • Threat
      • R(F)+S(G)
    • Vars
      • K(b);P_SPINR(e),S_FLIGHT,XS(D)::S(G)
      • K(b);S_FLIGHT::QAB(I)
      • R(e);XP(H)::R(F)+S(G),DCHECK
      • B(f);P_PINS(G),SBLOCK,XS(D)::QAB(I)
      • R(e);P_PINR(F)::R(F)+S(G),DCHECK
      • R(e);::R(F)+S(G),DCHECK
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