MESON Chess Problem Database

Problem Display
PID: 248229 (Q3nNK1/5p2/5p1k/8/4N1P1/8/8/5n2 w - - 0 1)

Blikeng, Bjarne

British Chess Magazine, 1949

Q3nNK1/5p2/5p1k/8/4N1P1/8/8/5n2

#2

5 + 5

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qh3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sg3
        • 2.Qc1#
        • 2.Qe3#
      • 1...Sg7!
    • 1.Qd8?
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sh2
        • 2.Qd2#
      • 1...Sg3
        • 2.Qd2#
      • 1...Sd6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qxf6#
      • 1...Sg7
        • 2.Qxf6#
      • 1...f5
        • 2.Qh4#
        • 2.Qg5#
      • 1...Se3!
  • Keys
    • 1.Qa1!
      • 1...Sd2
        • 2.Qh1#
      • 1...Sh2
        • 2.Qc1#
      • 1...Se3
        • 2.Qh1#
      • 1...Sg3
        • 2.Qc1#
      • 1...Sd6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qxf6#
      • 1...Sg7
        • 2.Qxf6#
      • 1...f5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • S(a);N_GUARD::QAB(C),XS(a)
      • Refutation
        • S(e);
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAB(C),XS(a)
        • S(a);N_GUARD::QAB(C)
        • S(e);N_GUARD::QAR2(C),XP(b)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • S(a);OGATE::QAR(C)
      • S(a);N_GUARD::QAB(C)
      • S(e);N_GUARD::QAR2(C),XP(b)
      • P(b);OGATE::QAR2(C)
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