MESON Chess Problem Database

Problem Display
PID: 231145 (BQ1N4/1P1k2K1/3N4/8/8/8/8/8 w - - 0 1)

Giobel, Bengt Rudolf

Aftonbladet, 1927

BQ1N4/1P1k2K1/3N4/8/8/8/8/8

#2

6 + 1

3713 Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Qc7#
  • Tries
    • 1.Qc8+?
      • 1...Ke7
        • 2.Qc7#
      • 1...Kxd6!
  • Keys
    • 1.Qa7!
      • threat
        • 2.b8Q#
      • 1...Kxd6
        • 2.b8Q#
        • 2.b8B#
      • 1...Kc7
        • 2.b8Q#
      • 1...Ke7
        • 2.b8Q#
      • 1...Kxd8
        • 2.b8Q#
        • 2.b8R#

Anticipated by 5982(1926)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
  • Actual
    • Q(E);
    • Threat
      • P=Q
    • Vars
      • K(a);P-FLIGHT,XS(A)::P=Q
      • K(a);P-FLIGHT::P=Q
      • K(a);P-FLIGHT,XS(F)::P=Q
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