MESON Chess Problem Database

Problem Display
PID: 79553 (Q7/3K1R2/7P/6k1/8/6N1/8/8 w - - 0 1)

Degenkolbe, Mirko

Tribune, 1990

Q7/3K1R2/7P/6k1/8/6N1/8/8

#2

5 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1?
      • threat
        • 2.Qh5#
      • 1...Kg6
        • 2.Qh5#
      • 1...Kg4!
    • 1.Qf3?
      • threat
        • 2.Qh5#
      • 1...Kg6
        • 2.Qh5#
        • 2.Qf6#
      • 1...Kxh6
        • 2.Qh5#
        • 2.Qf6#
      • 1...Kh4!
    • 1.Qd8+?
      • 1...Kg6
        • 2.Qf6#
      • 1...Kxh6
        • 2.Qf6#
      • 1...Kg4!
    • 1.Qg8+?
      • 1...Kxh6
        • 2.Rf6#
        • 2.Rh7#
        • 2.Qg7#
      • 1...Kh4!
  • Keys
    • 1.Rg7+!
      • 1...Kf4
        • 2.Qe4#
      • 1...Kh4
        • 2.Qh1#
      • 1...Kf6
        • 2.Qa1#
      • 1...Kxh6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
        • K(a);S_FLIGHT,XP(B)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(D);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAR(E)
      • K(a);S_FLIGHT::QAB(E)
      • K(a);S_FLIGHT,XP(B)::QAR2(E)
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