MESON Chess Problem Database

Problem Display
PID: 85775 (8/4Kn1p/6kN/5N2/8/5Q2/8/7n w - - 0 1)

Speckmann, Werner

Das Ratsel, 1935

8/4Kn1p/6kN/5N2/8/5Q2/8/7n

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Qg4#
    • 1...Sd6
      • 2.Qg4#
    • 1...Sd8
      • 2.Qg4#
    • 1...Sh8
      • 2.Qg4#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qf6#
      • 1...Kg5
        • 2.Qf6#
      • 1...Kxh6
        • 2.Qf6#
      • 1...Kg7
        • 2.Qf6#
      • 1...Sxg3!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Qf6#
      • 1...Kg5
        • 2.Qf6#
      • 1...Kxh6
        • 2.Qf6#
      • 1...Kxg7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(b);P-FLIGHT::QAR1(A)
    • S(c);N_GUARD::QAR2(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • S(a);XS(B)
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • K(b);P-FLIGHT,XS(B)::QAB1(A)
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