MESON Chess Problem Database

Problem Display
PID: 261379 (5K2/6N1/5k1p/1B1PN3/1p3P2/8/3B4/1q1b4 w - - 0 1)

Jaeger, Peter R

Neue Zurcher Zeitung, 1994

5K2/6N1/5k1p/1B1PN3/1p3P2/8/3B4/1q1b4

#2

7 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Se8#
    • 1...Qg6
      • 2.Sd7#
  • Tries
    • 1.Bd3?
      • threat
        • 2.Sd7#
        • 2.Se8#
      • 1...Ba4
        • 2.Sg4#
        • 2.Sh5#
      • 1...Bg4
        • 2.Sxg4#
        • 2.Se8#
      • 1...Bh5
        • 2.Sd7#
        • 2.Sxh5#
      • 1...Qxd3!
    • 1.Bd7?
      • threat
        • 2.Se8#
      • 1...Bh5
        • 2.Sxh5#
      • 1...Qg6!
    • 1.Be8?
      • threat
        • 2.Sd7#
      • 1...Ba4
        • 2.Sg4#
      • 1...Bg4
        • 2.Sxg4#
      • 1...Qf5!
  • Keys
    • 1.Be1!
      • threat
        • 2.Bh4#
      • 1...Qf5
        • 2.Se8#
      • 1...Qg6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::S(F)
    • Q(a);SBLOCK::S(E)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Refutation
        • Q(a);XB(C)
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • B(b);N_GUARD::S(F),XB(b)
      • Refutation
        • Q(a);
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • B(b);N_GUARD::S(E)
        • B(b);N_GUARD::S(E),XB(b)
      • Refutation
        • Q(a);
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • Q(a);SBLOCK::S(F)
      • Q(a);SBLOCK::S(E)
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