MESON Chess Problem Database

Problem Display
PID: 7894 (8/6Nn/6pK/R3P1p1/2N2k2/Qp3P2/q2pnP2/4R2B w - - 0 1)

Ahues, Herbert Siegfried Oskar

4/5 Prize, Sakkelet, 1994

8/6Nn/6pK/R3P1p1/2N2k2/Qp3P2/q2pnP2/4R2B

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Re4#
    • 1...Sg1
      • 2.Re4#
    • 1...Sd4
      • 2.Re4#
    • 1...Sf8
      • 2.Qxf8#
    • 1...b2
      • 2.Qe3#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Se6#
      • 1...Sd4
        • 2.Re4#
      • 1...b2
        • 2.Qe3#
      • 1...Sf8!
    • 1.Qc5?
      • threat
        • 2.Qe3#
      • 1...Sd4
        • 2.Re4#
        • 2.Qxd4#
      • 1...d1S!
    • 1.Qf8+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sxf8!
  • Keys
    • 1.Se3!
      • threat
        • 2.Se6#
      • 1...Sd4
        • 2.Sd5#
      • 1...Sf8
        • 2.Qxf8#
      • 1...b2
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • S(c);OGATE::R1(A)
    • S(h);N_GUARD::QAR(D),XS(h)
    • P(d);OGATE::QAB1(D)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(J)
      • Vars
        • S(c);OGATE::R1(A)
        • P(d);OGATE::QAB1(D)
      • Refutation
        • S(h);
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAR2(D),XS(h)
      • Refutation
        • S(h);XQ(D)
  • Actual
    • S(F);
    • Threat
      • S(J)
    • Vars
      • S(c);::S(F)
      • S(h);N_GUARD::QAR(D),XS(h)
      • P(d);::S(F)
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