MESON Chess Problem Database

Problem Display
PID: 187030 (4q3/2B2N2/8/2p1pPP1/2N2k2/6R1/2BnK1nP/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Landeszeitung fur die Luneburger Heide, 2001

(First published on Sat Mar 31 2001)

4q3/2B2N2/8/2p1pPP1/2N2k2/6R1/2BnK1nP/8

#2

9 + 6

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Bxe5#
    • 1...Qb5
      • 2.Bxe5#
    • 1...Qc6
      • 2.Bxe5#
    • 1...Qd7
      • 2.Bxe5#
    • 1...Qxf7
      • 2.Bxe5#
    • 1...Qa8
      • 2.Bxe5#
    • 1...Qc8
      • 2.Bxe5#
    • 1...Qd8
      • 2.Bxe5#
    • 1...Qf8
      • 2.Bxe5#
    • 1...Qg8
      • 2.Bxe5#
  • Tries
    • 1.Sfxe5?
      • threat
        • 2.Rg4#
      • 1...Qh5+
        • 2.Sf3#
      • 1...Qxe5+
        • 2.Bxe5#
      • 1...Se3
        • 2.Sg6#
      • 1...Se4!
  • Keys
    • 1.Scxe5!
      • threat
        • 2.Rg4#
      • 1...Qb5+
        • 2.Sc4#
      • 1...Qxe5+
        • 2.Bxe5#
      • 1...Se4
        • 2.Rf3#
      • 1...Se3
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD::B(H),XP(e)
    • Q(f);N_GUARD,P_PINS(E)::B(H),XP(e)
    • Q(f);N_GUARD,XS(I)::B(H),XP(e)
  • Tries
    • Try
      • S(I);P_SPINS(I),XP(e)
      • Threat
        • R1(D)
      • Vars
        • Q(f);CHECK,N_PINS(I)::B(H)+S(I)
        • Q(f);CHECK,OGATE,P_SPINQ(f),XS(I)::B(H),XQ(f)
        • S(b);N_PINS(I)::B(H)+S(I),DCHECK
      • Refutation
        • S(a);N_PINS(I)
  • Actual
    • S(E);P_SPINS(E),XP(e)
    • Threat
      • R1(D)
    • Vars
      • Q(f);CHECK,N_PINS(E)::B(H)+S(E)
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(E)::B(H),XQ(f)
      • S(a);N_GUARD,N_PINS(E)::R1(D)
      • S(b);N_PINS(E)::B(H)+S(E),DCHECK
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