MESON Chess Problem Database

Problem Display
PID: 90264 (3K4/6k1/6N1/R7/8/6B1/B7/6R1 w - - 0 1)

Hoy, Paul

Die Schwalbe, 1940

3K4/6k1/6N1/R7/8/6B1/B7/6R1

#2

6 + 1

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Bf4?
      • 1...Kh7
        • 2.Ra7#
      • 1...Kf6!
    • 1.Rh5?
      • threat
        • 2.Be5#
      • 1...Kf6
        • 2.Be5#
      • 1...Kxg6!
  • Keys
    • 1.Sf8!
      • 1...Kf6
        • 2.Bh4#
      • 1...Kh6
        • 2.Bf4#
      • 1...Kxf8
        • 2.Bd6#
      • 1...Kh8
        • 2.Be5#

This anticipates 169934(1945), 18264(1954), 171998(1970), 35521(1994), 79150(2001)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Threat
        • B(C)
      • Vars
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT,XS(E)
  • Actual
    • S(E);
    • Vars
      • K(a);S_FLIGHT::B(C)
      • K(a);S_FLIGHT,XS(E)::B(C)
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