MESON Chess Problem Database

Problem Display
PID: 81911 (3Q4/8/1b2q3/3bN3/1BR3p1/Kp2P2p/5P2/3k1B1R w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1969

3Q4/8/1b2q3/3bN3/1BR3p1/Kp2P2p/5P2/3k1B1R

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sb2#
        • 2.Rc1#
      • 1...Qxe3
        • 2.Sb2#
      • 1...Bxe3
        • 2.Sb2#
      • 1...Qc8
        • 2.Sb2#
      • 1...Qe5
        • 2.Rc1#
      • 1...Qc6
        • 2.Sb2#
      • 1...Qf6
        • 2.Rc1#
      • 1...Bd4
        • 2.Rc1#
      • 1...b2
        • 2.Sxb2#
      • 1...Bxc4!
    • 1.Qxd5+?
      • 1...Bd4
        • 2.Bd3#
        • 2.Qxd4#
      • 1...Qxd5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Bd3#
      • 1...Kc1
        • 2.Bd3#
      • 1...Kc2
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);N_PINB(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XP(E)::S(H)
        • B(f);XP(E)::S(H)
        • Q(g);::S(H)
        • Q(g);::R1(G)
        • B(f);::R1(G)
        • P(b);::S(H),XP(b)
      • Refutation
        • B(e);XR(G)
    • Try
      • Q(I);CHECK,XB(e)
      • Refutation
        • Q(g);XQ(I)
  • Actual
    • R(G);
    • Threat
      • R(B)+B(A)
    • Vars
      • K(a);N_SPINB(e),P-FLIGHT::R(B)+B(A)
      • K(a);N_SPINB(e),S_FLIGHT::B(A)
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