MESON Chess Problem Database

Problem Display
PID: 147926 (8/3p1Q2/1K1N2p1/4k3/1p1p3P/B2R4/bRP2N2/1r4b1 w - - 0 1)

Neale, Harry R

The Problemist, 1940

8/3p1Q2/1K1N2p1/4k3/1p1p3P/B2R4/bRP2N2/1r4b1

#2

9 + 8

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Sxc4#
    • 1...b3
      • 2.Sg4#
      • 2.Sc4#
  • Tries
    • 1.Re3+?
      • 1...Kxd6
        • 2.Bxb4#
      • 1...dxe3!
    • 1.Qf5+?
      • 1...Kxd6
        • 2.Bxb4#
      • 1...gxf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf6!
  • Keys
    • 1.Sg4+!
      • 1...Kxd6
        • 2.Bxb4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::S(H),XB(c)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P_SPINP(d),S_FLIGHT,XS(H)::B(D),XP(d)
      • Refutation
        • P(e);XR(E)
    • Try
      • Q(I);CHECK
      • Vars
        • K(f);P_SPINP(d),S_FLIGHT,XS(H)::B(D),XP(d)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(e)::R1(E),XP(e)
      • Refutation
        • K(f);S_FLIGHT,XQ(I)
  • Actual
    • S(C);CHECK
    • Vars
      • K(f);P_SPINP(d),S_FLIGHT,XS(H)::B(D),XP(d)
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