MESON Chess Problem Database

Problem Display
PID: 199638 (1nQ5/3p1n2/1pq5/1p4p1/pR6/PNk5/4P3/1K3N2 w - - 0 1)

Froberg, Johan Hilding Laurentius

Jonsson, Christer

Suomen Shakki, 1989

1nQ5/3p1n2/1pq5/1p4p1/pR6/PNk5/4P3/1K3N2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Qh8#
    • 1...d5
      • 2.Qh3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sd1#
        • 2.Sd5#
      • 1...d5
        • 2.Sd1#
        • 2.Sxd5#
      • 1...axb3!
    • 1.Sg3?
      • threat
        • 2.Se4#
      • 1...Sd6
        • 2.Qh8#
      • 1...d5!
    • 1.Sbd2?
      • threat
        • 2.Se4#
      • 1...Sd6
        • 2.Qh8#
      • 1...d5
        • 2.Qh3#
      • 1...Qc4!
  • Keys
    • 1.Sfd2!
      • threat
        • 2.Se4#
      • 1...Sd6
        • 2.Qh8#
      • 1...d5
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::QAB(G)
    • P(g);OGATE::QAR(G)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XS(E)
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(h);N_GUARD::QAB(G)
      • Refutation
        • P(g);
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(h);N_GUARD::QAB(G)
        • P(g);OGATE::QAR(G)
      • Refutation
        • Q(f);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • S(h);N_GUARD::QAB(G)
      • P(g);OGATE::QAR(G)
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