MESON Chess Problem Database

Problem Display
PID: 162052 (4K3/B3p3/3k4/8/4Q3/8/8/8 w - - 0 1)

Albertz, Heinrich

Aachener Anzeiger, 1926

4K3/B3p3/3k4/8/4Q3/8/8/8

#2

3 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qd5+?
      • 1...Kc7
        • 2.Qd7#
      • 1...Kxd5!
    • 1.Qd4+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kc7
        • 2.Qd7#
      • 1...Ke6!
    • 1.Qe6+?
      • 1...Kc7
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Qxe7+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kd5!
  • Keys
    • 1.Qf5!
      • 1...Kc6
        • 2.Qd7#
      • 1...Kc7
        • 2.Qd7#
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#

FEATURES

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