MESON Chess Problem Database

Problem Display
PID: 141600 (8/1K6/8/8/2k2P1Q/3N4/6R1/B7 w - - 0 1)

Speckmann, Werner

Die Schwalbe, 1969

8/1K6/8/8/2k2P1Q/3N4/6R1/B7

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1?
      • 1...Kb3
        • 2.Qb4#
      • 1...Kxd3
        • 2.Qe2#
      • 1...Kb5
        • 2.Qb4#
      • 1...Kd5!
    • 1.Qf6?
      • 1...Kxd3
        • 2.Qd4#
      • 1...Kb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kb3!
    • 1.Qe7?
      • 1...Kb3
        • 2.Qb4#
      • 1...Kxd3
        • 2.Qe2#
      • 1...Kb5
        • 2.Qb4#
      • 1...Kd5!
    • 1.Qh5?
      • 1...Kxd3
        • 2.Qe2#
      • 1...Kb3!
  • Keys
    • 1.f5+!
      • 1...Kb3
        • 2.Qb4#
      • 1...Kxd3
        • 2.Qd4#
      • 1...Kb5
        • 2.Qb4#
      • 1...Kd5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(D);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • K(a);S_FLIGHT::QAR1(E)
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