MESON Chess Problem Database

Problem Display
PID: 208232 (5K2/3p4/4k3/N4p2/Q7/6B1/8/8 w - - 0 1)

Dukic, Milenko

Land og Folk, 1975

5K2/3p4/4k3/N4p2/Q7/6B1/8/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc4#
    • 1...d5
      • 2.Qc6#
  • Tries
    • 1.Qc6+?
      • 1...d6
        • 2.Qxd6#
      • 1...dxc6!
    • 1.Qc4+?
      • 1...d5
        • 2.Qc6#
      • 1...Kf6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qc4#
      • 1...Kf6
        • 2.Qh6#
      • 1...d6
        • 2.Qxd6#
      • 1...d5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • P(c);N_GUARD::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR1(B),XP(c)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);N_GUARD,P_SPINP(c)::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(B)
      • P(c);::QAR1(B),XP(c)
      • P(c);::QAR1(B)
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