MESON Chess Problem Database

Problem Display
PID: 232340 (8/8/8/2k5/1RPR4/8/1K4N1/7Q w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1973

8/8/8/2k5/1RPR4/8/1K4N1/7Q

#2

6 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1?
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kc6!
    • 1.Qh5+?
      • 1...Kxb4
        • 2.Qb5#
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kc6!
    • 1.Qh6?
      • threat
        • 2.Qb6#
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kxb4!
    • 1.Qh8?
      • 1...Kc6
        • 2.Qc8#
      • 1...Kxb4!
  • Keys
    • 1.Qh3!
      • 1...Kxb4
        • 2.Qa3#
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kc6
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(D)::QAR1(A)
        • K(a);S_FLIGHT,XR(F)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • K(a);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
      • K(a);P-FLIGHT::QAR2(A)
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