MESON Chess Problem Database

Problem Display
PID: 169802 (8/3Q4/3n4/2Nk4/8/K2NP3/8/8 w - - 0 1)

Quindt, Paul

Die Schwalbe, 1945

8/3Q4/3n4/2Nk4/8/K2NP3/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb2?
      • 1...Ke5
        • 2.Qe6#
      • 1...Kxc5!
    • 1.Sb4+?
      • 1...Kxc5
        • 2.Qc6#
      • 1...Ke5
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qb7+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Sxb7!
  • Keys
    • 1.Se5!
      • 1...Kxc5
        • 2.Qc6#
      • 1...Kxe5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT,XS(D)
    • Try
      • S(B);CHECK
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT,XS(D)::QAR1(E)
        • K(a);N_SPINS(b),P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(E);CHECK,N_PINS(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • S(b);XQ(E)
  • Actual
    • S(B);
    • Vars
      • K(a);N_SPINS(b),P-FLIGHT,XS(D)::QAR1(E)
      • K(a);N_SPINS(b),P-FLIGHT,XS(B)::QAR1(E)
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