MESON Chess Problem Database

Problem Display
PID: 91366 (8/p2K4/8/1k1p4/3Q4/8/qp1B4/8 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

Die Schwalbe, 1941

8/p2K4/8/1k1p4/3Q4/8/qp1B4/8

#2

3 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Qb4#
    • 1...a6
      • 2.Qb4#
  • Tries
    • 1.Qc5+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Ka6
        • 2.Qc6#
      • 1...Kxc5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc6#
      • 1...Ka4
        • 2.Qb4#
      • 1...Ka6
        • 2.Qc6#
      • 1...Kb6
        • 2.Qc6#
      • 1...Qc4
        • 2.Qa5#
      • 1...Qa6
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(a);SBLOCK::QAR1(B)
    • P(e);SBLOCK::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
        • K(c);S_FLIGHT::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);S_FLIGHT::QAR1(B)
      • K(c);S_FLIGHT::QAR2(B)
      • K(c);P-FLIGHT::QAR1(B)
      • Q(a);N_GUARD,SBLOCK::QAR1(B)
      • Q(a);SBLOCK::QAR1(B)
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