MESON Chess Problem Database

Problem Display
PID: 226336 (rN6/Nk6/8/2QK4/8/8/8/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

Deutsche Schachzeitung, 1983

rN6/Nk6/8/2QK4/8/8/8/8

#2

4 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb8
      • 2.Qb6#
  • Tries
    • 1.Qb5+?
      • 1...Kxa7
        • 2.Sc6#
      • 1...Kc7!
    • 1.Qc8+?
      • 1...Kxa7
        • 2.Qc7#
      • 1...Kb6!
  • Keys
    • 1.Qc6+!
      • 1...Kxa7
        • 2.Qc7#
      • 1...Kxb8
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(D)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(C)::S(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR2(A)
      • K(a);P-FLIGHT,XS(D)::QAR2(A)
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