MESON Chess Problem Database

Problem Display
PID: 7375 (2nn1k2/5P1K/2N5/5Q2/8/8/8/8 w - - 0 1)

Lincoln, Robert A

9th HM., StrateGems, 1999

2nn1k2/5P1K/2N5/5Q2/8/8/8/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000
145 StrateGems 2000

SOLUTION

  • SOUND
  • Tries
    • 1.Sxd8?
      • 1...Ke7
        • 2.f8Q#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sa7
        • 2.Qc5#
      • 1...Se7
        • 2.Se6#
      • 1...Sd6!
    • 1.Qg6?
      • threat
        • 2.Qg7#
        • 2.Qg8#
      • 1...Sxf7
        • 2.Qg8#
      • 1...Se7
        • 2.Qg7#
      • 1...Se6
        • 2.Qg8#
      • 1...Sxc6!
    • 1.Qd7?
      • threat
        • 2.Qe8#
      • 1...Sd6
        • 2.Qe7#
      • 1...Sxf7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sg6#
      • 1...Ke7
        • 2.f8Q#
      • 1...Sxf7
        • 2.Qxf7#
      • 1...Se7
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);XS(b)
      • Vars
        • K(c);OGATE,S_FLIGHT::P=Q
        • S(a);N_GUARD::QAB(A)
        • S(a);SBLOCK::S(B)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(C)::QAR1(A)
        • S(a);::QAB1(A)
        • S(b);::QAR1(A)
      • Refutation
        • S(b);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(b);XP(C)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(c);OGATE,S_FLIGHT::P=Q
      • S(b);OGATE,P_SPINS(b),XP(C)::QAR1(A),XS(b)
      • S(a);SBLOCK::S(B)
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