MESON Chess Problem Database

Problem Display
PID: 85774 (Q7/4p3/6k1/4PRNR/8/7K/8/8 w - - 0 1)

Speckmann, Werner

Shakhmaty (Riga), 1961

Q7/4p3/6k1/4PRNR/8/7K/8/8

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qe4#
  • Tries
    • 1.Qe8+?
      • 1...Kg7
        • 2.Se6#
        • 2.Rh7#
        • 2.Qf7#
      • 1...Kxf5!
    • 1.Qg8+?
      • 1...Kxh5
        • 2.Sf7#
        • 2.Qh7#
      • 1...Kxf5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Sf3#
        • 2.Se4#
        • 2.Se6#
        • 2.Sf7#
        • 2.Sh7#
      • 1...Kxf5
        • 2.Qe4#
      • 1...Kxh5
        • 2.Sf7#
      • 1...Kg7
        • 2.Sf3#
        • 2.Se4#
        • 2.Se6#
      • 1...e6
        • 2.Sf3#
        • 2.Se4#
        • 2.Sxe6#
        • 2.Sf7#
        • 2.Sh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • Q(F);
    • Threat
      • DUALS(5)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(F)
      • K(a);S_FLIGHT,XR(E)::R(C)+S(D)
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