MESON Chess Problem Database

Problem Display
PID: 133466 (4N3/4p3/4r2n/4kb1R/2P1n1p1/r2pK3/3P2N1/7Q w - - 0 1)

Ahues, Herbert Siegfried Oskar

Der Tagesspiegel (Berlin), 1999

4N3/4p3/4r2n/4kb1R/2P1n1p1/r2pK3/3P2N1/7Q

#2

7 + 9

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Tries
    • 1.Se1?
      • threat
        • 2.Qxe4#
      • 1...Sxd2
        • 2.Qd5#
      • 1...Sf2
        • 2.Qd5#
      • 1...Sc3
        • 2.Sxd3#
      • 1...Sg3
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sf6!
    • 1.Sh4?
      • threat
        • 2.Qxe4#
      • 1...Sxd2
        • 2.Qd5#
      • 1...Sf2
        • 2.Qd5#
      • 1...Sg3
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sf6
        • 2.Sg6#
      • 1...Sc3!
    • 1.Qh2+?
      • 1...Sg3
        • 2.Qxg3#
      • 1...g3!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qxe4#
      • 1...Sxd2
        • 2.Qd5#
      • 1...Sf2
        • 2.Qd5#
      • 1...Sc3
        • 2.Sxd3#
      • 1...Sg3
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sf6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A),XS(c)
      • Vars
        • S(c);OGATE,XP(B)::QAR1(A)
        • S(c);OGATE::QAR1(A)
        • S(c);S_CUTR(a)::S(C),XP(b)
        • S(c);N_SPINB(f),OGATE::QAR1(A)
      • Refutation
        • S(c);
    • Try
      • S(C);
      • Threat
        • QAR1(A),XS(c)
      • Vars
        • S(c);OGATE,XP(B)::QAR1(A)
        • S(c);OGATE::QAR1(A)
        • S(c);N_SPINB(f),OGATE::QAR1(A)
        • S(c);S_CUTR(g)::S(C)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • S(C);
    • Threat
      • QAR1(A),XS(c)
    • Vars
      • S(c);OGATE,XP(B)::QAR1(A)
      • S(c);OGATE::QAR1(A)
      • S(c);S_CUTR(a)::S(C),XP(b)
      • S(c);N_SPINB(f),OGATE::QAR1(A)
      • S(c);S_CUTR(g)::S(C)
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