MESON Chess Problem Database

Problem Display
PID: 82361 (b4B1b/8/qp6/R2p2pn/2pkN3/2N2p2/2KP2PQ/4Rr2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Suomen Shakki, 1995

b4B1b/8/qp6/R2p2pn/2pkN3/2N2p2/2KP2PQ/4Rr2

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qb7
      • 2.Sb5#
    • 1...Qc8
      • 2.Sb5#
    • 1...Qa7
      • 2.Sb5#
    • 1...Sg3
      • 2.Qxh8#
    • 1...Sf4
      • 2.Qxh8#
    • 1...bxa5
      • 2.Bc5#
    • 1...b5
      • 2.Bc5#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Sf5#
      • 1...Sxg3
        • 2.Qxh8#
      • 1...fxg2
        • 2.Sge2#
      • 1...Qc8
        • 2.Sb5#
      • 1...Sg7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf5#
      • 1...fxg2
        • 2.Se2#
      • 1...Qc8
        • 2.Sdb5#
      • 1...Sg3
        • 2.Qxh8#
      • 1...Sg7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD::S(F),XQ(h)
    • Q(h);N_GUARD::S(F)
    • S(g);OGATE::QAB(E),XB(k)
    • P(i);N_GUARD,XR(H)::B(I)
    • P(i);N_GUARD::B(I)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • S(g);OGATE,XS(G)::QAB(E),XB(k)
        • P(b);N_GUARD,XP(D)::S(G)
        • Q(h);N_GUARD::S(F)
      • Refutation
        • S(g);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • P(b);N_GUARD,XP(D)::S(F)
      • Q(h);N_GUARD::S(G)
      • S(g);OGATE::QAB(E),XB(k)
      • S(g);S_CUTB(k)::QAB1(E)
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