MESON Chess Problem Database

Problem Display
PID: 169805 (8/4Q3/4p3/3NkN2/8/4K3/8/8 w - - 0 1)

Gebhard, Franz

Stettiner Generalanzeiger, 1945

8/4Q3/4p3/3NkN2/8/4K3/8/8

#2

4 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kd3?
      • 1...Kxd5
        • 2.Qd6#
      • 1...Kxf5!
    • 1.Kf3?
      • 1...Kxf5
        • 2.Qf6#
      • 1...Kxd5!
    • 1.Qc7+?
      • 1...Kxd5
        • 2.Se7#
      • 1...Kxf5!
    • 1.Qg7+?
      • 1...Kxf5
        • 2.Se7#
      • 1...Kxd5!
  • Keys
    • 1.Qe8!
      • 1...Kxd5
        • 2.Qb5#
      • 1...Kxf5
        • 2.Qh5#

Anticipated by 23002(1881), 222665(1884), 194199(1917)

This anticipates 2154(1964), 109480(1986), 103549(2006)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XS(B)::QAR1(D)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XS(C)
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XS(B)
    • Try
      • Q(D);CHECK,N_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XS(B)::S(C)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(D);CHECK,N_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XS(C)::S(B)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • Q(D);
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(B)::QAR2(D)
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR2(D)
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