MESON Chess Problem Database

Problem Display
PID: 21401 (8/8/Q7/8/4k3/8/4N3/R3K2R w QK - 0 1)

Hannemann, Knud Harald

Skakbladet, 1918

8/8/Q7/8/4k3/8/4N3/R3K2R

#2

5 + 1

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Ra4+?
      • 1...Ke3
        • 2.Rh3#
      • 1...Kd5
        • 2.Rh5#
      • 1...Ke5
        • 2.Rh5#
      • 1...Kf5
        • 2.Rh5#
      • 1...Kf3!
    • 1.Rh4+?
      • 1...Ke3
        • 2.Ra3#
        • 2.Qa3#
      • 1...Kd5
        • 2.Ra5#
      • 1...Ke5
        • 2.Ra5#
      • 1...Kf5
        • 2.Ra5#
      • 1...Kf3!
    • 1.Qc6+?
      • 1...Kd3
        • 2.Ra3#
        • 2.Rh3#
      • 1...Ke3
        • 2.Ra3#
        • 2.Rh3#
      • 1...Ke5
        • 2.Ra5#
        • 2.Rh5#
      • 1...Kf5!
    • 1.Qg6+?
      • 1...Ke3
        • 2.Ra3#
        • 2.Rh3#
      • 1...Kf3
        • 2.Ra3#
        • 2.Rh3#
      • 1...Ke5
        • 2.Ra5#
        • 2.Rh5#
      • 1...Kd5!
  • Keys
    • 1.Qe6+!
      • 1...Kd3
        • 2.0-0-0#
      • 1...Kf3
        • 2.0-0#

Anticipated by 159989(1900)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(C)
        • K(a);S_FLIGHT::R(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);S_FLIGHT::R(A)
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);CHECK
    • Vars
      • K(a);S_FLIGHT::0-0-0
      • K(a);S_FLIGHT::0-0
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