MESON Chess Problem Database

Problem Display
PID: 4528 (Q7/5B2/8/8/6k1/8/6N1/5K2 w - - 0 1)

Blumenthal, Oscar

Osterreichische Schachzeitung, 1875

Q7/5B2/8/8/6k1/8/6N1/5K2

#2

4 + 1

3757 Schachminiaturen I 1902
16 Chess Amateur (The) 1908
2838 Fun with Chess Miniatures 1996
3713 Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3+?
      • 1...Kg5
        • 2.Qf4#
      • 1...Kxf3!
    • 1.Qe4+?
      • 1...Kh3
        • 2.Qh4#
      • 1...Kg5
        • 2.Qg6#
        • 2.Qf4#
      • 1...Kg3!
    • 1.Qa4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kh3
        • 2.Qh4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kg5
        • 2.Qf4#
      • 1...Kg3!
  • Keys
    • 1.Qb8!
      • 1...Kf3
        • 2.Qf4#
      • 1...Kh3
        • 2.Be6#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kg5
        • 2.Qf4#

Anticipated by 121004(0000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);OGATE,S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::B(C)
      • K(a);P-FLIGHT::QAB1(D)
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