MESON Chess Problem Database

Problem Display
PID: 162047 (3b1n2/2p5/2R2pPK/q4kpB/1r2N1R1/3p4/5P1B/5Q2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1986

3b1n2/2p5/2R2pPK/q4kpB/1r2N1R1/3p4/5P1B/5Q2

#2

9 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qh3?
      • threat
        • 2.Qf3#
      • 1...Rxe4
        • 2.Rxg5#
      • 1...Sxg6
        • 2.Bxg6#
      • 1...Qe5
        • 2.Rf4#
      • 1...Se6!
    • 1.Qe1?
      • threat
        • 2.Sg3#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Qe5!
  • Keys
    • 1.Qxd3!
      • threat
        • 2.Qf3#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sxg6
        • 2.Qd7#
      • 1...Qe5
        • 2.Sg3#
      • 1...Qa3
        • 2.Qd5#
      • 1...Rb3
        • 2.Sc3#
      • 1...Se6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • R(b);SBLOCK,XS(D)::QAB(A)+R(E),DCHECK,XP(e)
        • S(i);OGATE,XP(H)::B(F),XS(i)
        • Q(c);SBLOCK::QAB(A)+R(E),DCHECK
      • Refutation
        • S(i);
    • Try
      • Q(A);
      • Threat
        • S(D)
      • Vars
        • R(b);OGATE,XS(D)::QAB1(A),XR(b)
      • Refutation
        • Q(c);
  • Actual
    • Q(A);XP(a)
    • Threat
      • QAR2(A)
    • Vars
      • R(b);OGATE,P_SPINR(b),XS(D)::QAB1(A),XR(b)
      • S(i);N_GUARD,XP(H)::QAB(A)
      • Q(c);SBLOCK::QAB(A)+S(D),DCHECK
      • Q(c);N_GUARD::QAR2(A)
      • R(b);N_GUARD::QAB(A)+S(D)
      • S(i);SBLOCK::QAB(A)+S(D),DCHECK
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