MESON Chess Problem Database

Problem Display
PID: 227229 (3R4/b4n2/2B3Q1/3Np3/3k4/1P6/8/6K1 w - - 0 1)

Berhausen, Fritz

Die Schwalbe, 1928

3R4/b4n2/2B3Q1/3Np3/3k4/1P6/8/6K1

#2

6 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qc4#
      • 1...e4
        • 2.Qc3#
      • 1...Sd6!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qc3#
      • 1...Kxd3+!
    • 1.Qe4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kxe4+!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe3#
      • 1...Ke4+
        • 2.Se3#
      • 1...Kc5
        • 2.Qc3#
      • 1...e4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(b);SBLOCK::QAB1(E)
      • Refutation
        • S(d);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);CHECK,P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);CHECK,P-FLIGHT,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);CHECK,P-FLIGHT::B(D)+S(C)
      • K(a);S_FLIGHT::QAR2(E)
      • P(b);SBLOCK::QAB1(E)
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