MESON Chess Problem Database

Problem Display
PID: 165346 (B7/b1p2b2/Qp6/pnkPB3/3p3K/8/2NN4/2n5 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2016

B7/b1p2b2/Qp6/pnkPB3/3p3K/8/2NN4/2n5

#2

7 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Se4#
    • 1...Sc3
      • 2.Qc4#
    • 1...Sd6
      • 2.Bxd4#
  • Tries
    • 1.Bxd4+?
      • 1...Sxd4
        • 2.Se4#
      • 1...Kd6!
    • 1.Qb7?
      • threat
        • 2.Qc6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...c6
        • 2.Qxc6#
      • 1...Be8!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Qxb5#
      • 1...Sa3
        • 2.Se4#
      • 1...Sc3
        • 2.Qc4#
      • 1...Sd6
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(d);::S(B)
    • S(d);OGATE::QAR1(F)
    • S(d);N_GUARD,SBLOCK::B(E),XP(b)
  • Tries
    • Try
      • B(E);CHECK,XP(b)
      • Vars
        • S(d);XB(E)::S(B)
      • Refutation
        • K(e);P_SPINP(f),S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • B(i);OGATE,XP(D)::QAR1(F),XB(i)
        • P(h);::QAR1(F),XP(h)
      • Refutation
        • B(i);
  • Actual
    • B(G);
    • Threat
      • QAR1(F),XS(d)
    • Vars
      • S(d);::S(B)
      • S(d);OGATE::QAR1(F)
      • S(d);N_GUARD,SBLOCK::B(E),XP(b)
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