MESON Chess Problem Database

Problem Display
PID: 173891 (8/2N2Q2/3r4/1pp1k1N1/8/3p4/1K6/8 w - - 0 1)

Lubton, Yehuda

Boletim da UBP, 1985

8/2N2Q2/3r4/1pp1k1N1/8/3p4/1K6/8

#2

4 + 5

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qf4#
  • Tries
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qe4#
        • 2.Qf4#
      • 1...Kxf5!
  • Keys
    • 1.Sh3!
      • threat
        • 2.Qf4#
      • 1...Kd4
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Rf6
        • 2.Qd5#
      • 1...Rd4
        • 2.Qe6#

Anticipated by 12076(1974)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAR2(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(D)
  • Actual
    • S(B);
    • Threat
      • QAB1(D)
    • Vars
      • K(d);S_FLIGHT::QAR2(D)
      • K(d);P-FLIGHT::QAR1(D)
      • R(e);N_GUARD,SBLOCK::QAR1(D)
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