MESON Chess Problem Database

Problem Display
PID: 18726 (K1kB1n1r/8/n2Q4/8/8/8/8/8 w - - 0 1)

Speckmann, Werner

Tijdschrift vd KNSB, 1957

K1kB1n1r/8/n2Q4/8/8/8/8/8

#2

3 + 4

3295 Einfuhrung in die Welt des Schachproblem 1984
2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qc7#
    • 1...Sc5
      • 2.Qc7#
    • 1...Sc7+
      • 2.Qxc7#
    • 1...Sb8
      • 2.Qc7#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Qd8#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#
      • 1...Sd7!
    • 1.Qc6+?
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Kxd8!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Qd8#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qxa6#
      • 1...Sh7
        • 2.Qe6#

There are these versions: 230760

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);CHECK,N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(A),XS(a)
        • S(c);N_GUARD::QAB(A),XS(c)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);CHECK,N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XB(C)
  • Actual
    • B(C);
    • Threat
      • QAR1(A)
    • Vars
      • S(a);CHECK,N_GUARD::QAR1(A),XS(a)
      • S(c);N_GUARD::QAB(A),XS(c)
      • S(c);N_GUARD::QAB(A)
      • S(c);SBLOCK::QAB(A),XS(a)
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