MESON Chess Problem Database

Problem Display
PID: 246478 (4Kn2/2Q5/5B2/3k4/8/3P4/3P4/8 w - - 0 1)

Speckmann, Werner

Europe Echecs, 1965

4Kn2/2Q5/5B2/3k4/8/3P4/3P4/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe5#
  • Tries
    • 1.Be7?
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qd6#
      • 1...Ke6!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc5!
  • Keys
    • 1.Bd4!
      • 1...Kxd4
        • 2.Qd6#
      • 1...Ke6
        • 2.Qe5#
      • 1...Se6
        • 2.Qd7#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sh7
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(D)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
  • Actual
    • B(C);
    • Vars
      • K(a);P-FLIGHT,XB(C)::QAR2(D)
      • K(a);S_FLIGHT::QAR1(D)
      • S(b);N_GUARD::QAR2(D)
      • S(b);N_GUARD::QAR2(D),XS(b)
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