MESON Chess Problem Database

Problem Display
PID: 56344 (1rB4N/3R4/4k3/R2p4/4p1n1/8/1B6/K3Q3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

1st Prize, Die Schwalbe, 1965/II

1rB4N/3R4/4k3/R2p4/4p1n1/8/1B6/K3Q3

#2

7 + 5

23 Die Schwalbe 1969
3772 FIDE Album (1965-1967) 1976

SOLUTION

  • SOUND
  • Tries
    • 1.Qh4?
      • threat
        • 2.Qxg4#
      • 1...Kf5
        • 2.Rf7#
      • 1...Rxb2
        • 2.Rdxd5#
      • 1...Sf2
        • 2.Qf6#
      • 1...Sh2
        • 2.Qf6#
      • 1...Se3
        • 2.Qf6#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sh6
        • 2.Qf6#
      • 1...d4
        • 2.Qe7#
      • 1...Se5!
    • 1.Qxe4+?
      • 1...Se5
        • 2.Qxe5#
      • 1...dxe4!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxg4#
      • 1...Kf5
        • 2.Rdxd5#
      • 1...Rxb2
        • 2.Rf7#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf2
        • 2.Qe5#
        • 2.Qg6#
      • 1...Sh2
        • 2.Qe5#
        • 2.Qg6#
      • 1...Se3
        • 2.Qe5#
        • 2.Qg6#
      • 1...Sf6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
        • 2.Qg6#
      • 1...d4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB(B),XS(b)
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT::B(F)+R(E),DCHECK
        • R(e);N_GUARD,XB(C)::B(F)+R(E),XP(c)
        • S(b);N_GUARD::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
        • P(c);::QAR1(B)
      • Refutation
        • S(b);
    • Try
      • Q(B);CHECK,XP(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(B),XS(b)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • QAB(B),XS(b)
    • Vars
      • K(d);P_SPINP(c),S_FLIGHT::B(F)+R(E),DCHECK,XP(c)
      • R(e);N_GUARD,XB(C)::B(F)+R(E)
      • S(b);N_GUARD::QAR1(B),XS(b)
      • S(b);N_GUARD::QAR1(B)
      • P(c);::QAR1(B)
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