MESON Chess Problem Database

Problem Display
PID: 7461 (b7/1Q6/8/2p2pp1/R3q3/8/4NR2/K6k w - - 0 1)

Hoffmann, Fritz

Landeszeitung fur die Luneburger Heide, 1990

b7/1Q6/8/2p2pp1/R3q3/8/4NR2/K6k

#2

5 + 6

23 Die Schwalbe 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qb1#
    • 1...Qd5
      • 2.Qh7#
    • 1...Qc6
      • 2.Qb1#
    • 1...g4
      • 2.Qh7#
  • Tries
    • 1.Rxe4?
      • threat
        • 2.Rh4#
        • 2.Qb1#
        • 2.Qh7#
      • 1...fxe4
        • 2.Qb1#
        • 2.Qh7#
      • 1...f4
        • 2.Qb1#
        • 2.Qh7#
      • 1...g4
        • 2.Qb1#
        • 2.Qh7#
      • 1...Bxb7!
    • 1.Ra6?
      • threat
        • 2.Rh6#
      • 1...Qc6
        • 2.Qb1#
      • 1...Bxb7!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Rh3#
      • 1...Qf3
        • 2.Qb1#
      • 1...g4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::QAR(E)
    • P(e);::QAR(E)
  • Tries
    • Try
      • R(D);XQ(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(f);XQ(E)
    • Try
      • R(D);
      • Threat
        • R(D)
      • Vars
        • Q(b);N_GUARD::QAR(E)
      • Refutation
        • B(f);N_SPINQ(b),XQ(E)
  • Actual
    • R(D);
    • Threat
      • R(D)
    • Vars
      • Q(b);N_GUARD::QAR(E)
      • P(e);::QAR(E)
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