MESON Chess Problem Database

Problem Display
PID: 82172 (B7/p7/Nq2p1b1/4n2N/3B3R/QPpk4/4p3/2Kn4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Deutsche Schachzeitung, 1975

B7/p7/Nq2p1b1/4n2N/3B3R/QPpk4/4p3/2Kn4

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qc7
      • 2.Sb4#
    • 1...Qd8
      • 2.Sb4#
      • 2.Sc5#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Qc6
      • 2.Sb4#
    • 1...Qb7
      • 2.Sc5#
    • 1...Qb8
      • 2.Sc5#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Sf4#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Bxh5
        • 2.Be4#
      • 1...Qb7
        • 2.Sc5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Qc6!
    • 1.Qc5?
      • threat
        • 2.Sf4#
      • 1...Qxc5
        • 2.Sxc5#
      • 1...Bxh5
        • 2.Be4#
      • 1...Qc6
        • 2.Sb4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Qb7!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Sf4#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Bxh5
        • 2.Be4#
      • 1...Qb4
        • 2.Sxb4#
      • 1...Qc6
        • 2.Sb4#
      • 1...Qb7
        • 2.Sc5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(f);N_GUARD::S(G),XQ(f)
    • Q(f);N_GUARD::S(G)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • Q(f);OGATE,XB(D)::QAR1(B),XQ(f)
        • Q(f);XQ(B)::S(G),XQ(f)
        • B(h);N_GUARD,XS(F)::B(H)
        • Q(f);N_GUARD::S(G)
        • S(e);N_GUARD::QAB1(B),XS(e)
        • S(e);N_GUARD::QAB1(B)
      • Refutation
        • Q(f);
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • Q(f);XQ(B)::S(G),XQ(f)
        • B(h);N_GUARD,XS(F)::B(H)
        • Q(f);N_GUARD::S(G)
        • S(e);N_GUARD::QAB1(B)
      • Refutation
        • Q(f);
  • Actual
    • Q(B);
    • Threat
      • S(F)
    • Vars
      • Q(f);OGATE,XB(D)::QAR1(B),XQ(f)
      • B(h);N_GUARD,XS(F)::B(H)
      • Q(f);N_GUARD::S(G),XQ(f)
      • Q(f);N_GUARD::S(G)
      • S(e);N_GUARD::QAB1(B),XS(e)
      • S(e);N_GUARD::QAB1(B)
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