MESON Chess Problem Database

Problem Display
PID: 212387 (8/5p2/5p2/5Q2/7k/7N/8/5KN1 w - - 0 1)

Speckmann, Werner

The Problemist, 1986

8/5p2/5p2/5Q2/7k/7N/8/5KN1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kg3
      • 2.Qf4#
  • Tries
    • 1.Qe4+?
      • 1...Kg3
        • 2.Qf4#
      • 1...Kh5!
    • 1.Qg6?
      • 1...f5
        • 2.Qg5#
      • 1...fxg6!
  • Keys
    • 1.Qxf6+!
      • 1...Kg3
        • 2.Qf4#
      • 1...Kg4
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • P(b);N_GUARD::QAB1(D)
      • Refutation
        • P(c);XQ(D)
  • Actual
    • Q(D);CHECK,XP(b)
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR1(D)
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