MESON Chess Problem Database

Problem Display
PID: 205572 (7Q/1K5P/1N2k3/5N2/8/5P2/8/8 w - - 0 1)

Berhausen, Fritz

Deutsche Schachblatter, 1925

7Q/1K5P/1N2k3/5N2/8/5P2/8/8

#2

6 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd5?
      • 1...Kxf5
        • 2.Qf6#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#
      • 1...Kxd5!
  • Keys
    • 1.Sd7!
      • 1...Kd5
        • 2.Qg8#
      • 1...Kxf5
        • 2.Qf6#
      • 1...Kxd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#

Anticipated by 165386(1891), 143280(1893), 194131(1917)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(F)
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAB(F)
      • K(a);S_FLIGHT,XS(B)::QAR1(F)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(F)
      • K(a);S_FLIGHT::QAB1(F)
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