MESON Chess Problem Database

Problem Display
PID: 142144 (8/5K2/8/5k2/Q7/4PN2/4nn2/8 w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 1974

8/5K2/8/5k2/Q7/4PN2/4nn2/8

#2

4 + 3

3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qf4#
    • 1...Sg1
      • 2.Qf4#
    • 1...Sc3
      • 2.Qf4#
    • 1...Sg3
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Se4
      • 2.Qd7#
    • 1...Sg4
      • 2.Qc2#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qe6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sd4!
  • Keys
    • 1.Qh4!
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sg4
        • 2.Qh7#
      • 1...Sc1
        • 2.Qf4#
      • 1...Sg1
        • 2.Qf4#
      • 1...Sc3
        • 2.Qf4#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sd1
        • 2.e4#
      • 1...Sh1
        • 2.e4#
      • 1...Sd3
        • 2.e4#
      • 1...Sh3
        • 2.e4#
      • 1...Se4
        • 2.Qh3#

Anticipated by 254545(1936)

This anticipates 215664(1979)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
    • S(b);SBLOCK::QAB(C)
    • S(b);N_GUARD,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • S(a);N_GUARD::QAR1(C),XS(a)
      • S(b);SBLOCK::QAB(C)
      • S(a);N_GUARD::QAR1(C)
      • S(b);N_GUARD::P(A)
      • S(b);N_GUARD,SBLOCK::QAB(C)
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