MESON Chess Problem Database

Problem Display
PID: 268480 (8/6n1/2r1pr2/Rq3kBR/7P/1pPP1NPP/7Q/1B3K2 w - - 0 1)

Pietzcker, Eduard

Die Schwalbe, 1931

8/6n1/2r1pr2/Rq3kBR/7P/1pPP1NPP/7Q/1B3K2

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.d4#
    • 1...Qc5
      • 2.d4#
    • 1...Qd5
      • 2.d4#
    • 1...Qe5
      • 2.d4#
    • 1...Rc4
      • 2.dxc4#
      • 2.d4#
    • 1...Rg6
      • 2.g4#
  • Tries
    • 1.Sd4+?
      • 1...Ke5+
        • 2.Bf4#
      • 1...Kg6+!
  • Keys
    • 1.Se5!
      • threat
        • 2.g4#
      • 1...Kxe5+
        • 2.Bf4#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Qxe5
        • 2.d4#
      • 1...Qa4
        • 2.d4#
      • 1...Qc4
        • 2.dxc4#
      • 1...Qb4
        • 2.d4#
      • 1...Rc4
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_PINP(E),N_SPINQ(b),XR(J)::B(A)+P(E)
    • Q(b);N_PINP(E)::B(A)+P(E)
    • R(f);SBLOCK::P(G)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);CHECK,N_GUARD,P-FLIGHT::R(L)+B(K),DCHECK
      • Refutation
        • K(c);CHECK,N_SPINQ(b),S_FLIGHT
  • Actual
    • S(F);N_PINQ(b)
    • Threat
      • P(G)
    • Vars
      • K(c);CHECK,P-FLIGHT,P_SPINQ(b),XS(F)::R(L)+B(K),DCHECK
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(E)::B(A),XQ(b)
      • Q(b);N_PINP(E),P_SPINQ(b),XS(F)::B(A)+P(E)
      • Q(b);N_PINP(E)::B(A)+P(E)
      • Q(b);::B(A)+P(E),XQ(b)
      • R(d);N_PINP(E)::B(A)+P(E)
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Developed and maintained by Brian Stephenson.
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