MESON Chess Problem Database

Problem Display
PID: 159823 (5B2/Q1p1R3/2b5/1PR4r/1k1p4/n7/2pN4/1nK2Bb1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

The Australian Problemist, 1964

5B2/Q1p1R3/2b5/1PR4r/1k1p4/n7/2pN4/1nK2Bb1

#2

8 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb5
      • 2.Rc4#
  • Tries
    • 1.Qa5+?
      • 1...Kxc5
        • 2.Re5#
        • 2.Rd7#
      • 1...Kxa5!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Rb3#
      • 1...Kxc3
        • 2.Qa5#
      • 1...Sxd2
        • 2.Qxa3#
      • 1...Sxc3
        • 2.Re5#
      • 1...dxc3
        • 2.Re4#
      • 1...Rh3
        • 2.Ree3#
      • 1...Bd5
        • 2.Rexc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD,SBLOCK,XP(D)::R1(E)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(e);S_FLIGHT,XQ(F)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • K(e);S_FLIGHT,XR(E)::QAB(F)
      • S(a);N_GUARD,XS(C)::QAB1(F),XS(d)
      • S(a);SBLOCK,XR(E)::B(H)+R(G)
      • P(f);SBLOCK,XR(E)::B(H)+R(G),DCHECK
      • R(g);N_GUARD::B(H)+R(G)
      • B(h);S_CUTR(g)::B(H)+R(G),XP(i)
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