MESON Chess Problem Database

Problem Display
PID: 15182 (8/1P6/k7/4Q3/8/K7/6B1/8 w - - 0 1)

Walther, Frank

Urania, 1980

8/1P6/k7/4Q3/8/K7/6B1/8

#2

4 + 1

3295 Einfuhrung in die Welt des Schachproblem 1984
23 Die Schwalbe 2005

SOLUTION

  • SOUND
  • Tries
    • 1.Ka4?
      • threat
        • 2.Qa5#
      • 1...Kb6
        • 2.Qa5#
      • 1...Ka7!
    • 1.Kb4?
      • threat
        • 2.Qa5#
      • 1...Kb6
        • 2.Qa5#
      • 1...Ka7!
    • 1.Qb5+?
      • 1...Ka7
        • 2.b8Q#
        • 2.b8B#
      • 1...Kxb5!
    • 1.b8S+?
      • 1...Ka7
        • 2.Qc7#
      • 1...Kb6!
  • Keys
    • 1.Qc7!
      • 1...Kb5
        • 2.Bf1#
      • 1...Ka7
        • 2.b8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::P=Q
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • P(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::B(A)
      • K(a);P-FLIGHT::P=S
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