MESON Chess Problem Database

Problem Display
PID: 232354 (5R2/3k2P1/8/3K4/8/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1975

5R2/3k2P1/8/3K4/8/8/8/8

#2

3 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.g8Q?
      • threat
        • 2.Rf7#
        • 2.Qf7#
        • 2.Qh7#
        • 2.Qg7#
      • 1...Ke7
        • 2.Rf7#
        • 2.Qf7#
        • 2.Qg7#
      • 1...Kc7!
  • Keys
    • 1.Rf7+!
      • 1...Kc8
        • 2.g8Q#
        • 2.g8R#
      • 1...Kd8
        • 2.g8Q#
        • 2.g8R#
      • 1...Ke8
        • 2.g8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(B);
      • Threat
        • DUALS(4)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(C);CHECK
    • Vars
      • K(a);S_FLIGHT::P=Q
      • K(a);P-FLIGHT::P=Q
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