MESON Chess Problem Database

Problem Display
PID: 200648 (6Q1/2n5/8/8/b4Bp1/8/6k1/4K2R w K - 0 1)

Dukic, Milenko

Stella Polaris, 1967

6Q1/2n5/8/8/b4Bp1/8/6k1/4K2R

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qd5#
      • 2.Qa8#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
  • Tries
    • 1.Rh2+?
      • 1...Kg1
        • 2.Qxg4#
      • 1...Kf3!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qf1#
        • 2.Qe4#
      • 1...Kxh1
        • 2.Qf1#
      • 1...Kf3
        • 2.0-0#
      • 1...Bd1
        • 2.Qf1#
      • 1...Bc2
        • 2.Qf1#
      • 1...Bb5
        • 2.Qe4#
      • 1...Bc6
        • 2.Qf1#

This is after

After S Svetec.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • S(d);N_GUARD::QAB(D),XS(d)
    • S(d);N_GUARD::QAB(D)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(D),XP(c)
      • Refutation
        • K(a);N_SPINP(c),S_FLIGHT
  • Actual
    • Q(D);N_PINP(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR2(D)
      • K(a);S_FLIGHT::0-0
      • B(b);::QAB1(D)
      • B(b);::QAB(D)
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