MESON Chess Problem Database

Problem Display
PID: 151591 (4Q2B/4P3/1R6/7B/8/2p5/2pk1K2/8 w - - 0 1)

Ahlheim, Karl-Heinz

Die Schwalbe, 1961

4Q2B/4P3/1R6/7B/8/2p5/2pk1K2/8

#2

6 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5?
      • 1...Kc1
        • 2.Qg5#
      • 1...c1Q
        • 2.Qe2#
      • 1...c1B
        • 2.Qe2#
      • 1...c1R
        • 2.Qe2#
      • 1...c1S!
    • 1.Qg6?
      • 1...Kc1
        • 2.Qg5#
        • 2.Qh6#
      • 1...c1Q
        • 2.Rd6#
      • 1...c1B
        • 2.Rd6#
      • 1...c1R
        • 2.Rd6#
      • 1...c1S!
  • Keys
    • 1.Qa4!
      • 1...Kc1
        • 2.Qf4#
      • 1...Kd3
        • 2.Rd6#
        • 2.Qd4#
      • 1...c1Q
        • 2.Rd6#
      • 1...c1S
        • 2.Qd1#
      • 1...c1B
        • 2.Rd6#
        • 2.Qd1#
      • 1...c1R
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
        • P(a);SBLOCK::QAR1(E)
      • Refutation
        • P(a);
    • Try
      • Q(E);
      • Vars
        • P(a);SBLOCK::R(C)
      • Refutation
        • P(a);
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB(E)
      • P(a);SBLOCK::R(C)
      • P(a);OGATE::QAR1(E)
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