MESON Chess Problem Database

Problem Display
PID: 81675 (K4n2/5Qb1/p1pp4/2kN4/1R6/2P2N2/q4nB1/8 w - - 0 1)

Macleod, Norman Alasdair

Schach-Aktiv, 1985

K4n2/5Qb1/p1pp4/2kN4/1R6/2P2N2/q4nB1/8

#2

7 + 8

6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Qa7#
    • 1...Bd4
      • 2.cxd4#
    • 1...cxd5
      • 2.Qc7#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qa7#
      • 1...cxd5
        • 2.Qc7#
      • 1...Qa5
        • 2.Sb3#
      • 1...Se4
        • 2.Sxe4#
      • 1...Sd7!
    • 1.Sd4?
      • threat
        • 2.Qa7#
      • 1...Qa5
        • 2.Sb3#
      • 1...Sd7
        • 2.Se6#
      • 1...Se4!
    • 1.Sg5?
      • threat
        • 2.Qa7#
      • 1...cxd5
        • 2.Qc7#
      • 1...Se4
        • 2.Sxe4#
      • 1...Sd7
        • 2.Se6#
      • 1...Qa5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qa7#
      • 1...dxe5
        • 2.Qe7#
      • 1...Qa5
        • 2.Qxf2#
      • 1...Se4
        • 2.Sd3#
      • 1...Sd7
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(a);SBLOCK,XS(E)::QAB(F)
    • B(g);OGATE::P(B),XB(g)
    • P(e);OGATEB,SBLOCK,XS(E)::QAR2(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB(F)
      • Vars
        • P(e);OGATEB,XS(E)::QAR2(F)
        • Q(a);N_GUARD::S(C)
        • S(b);N_GUARD::S(C),XS(b)
      • Refutation
        • S(h);
    • Try
      • S(C);
      • Threat
        • QAB(F)
      • Vars
        • Q(a);N_GUARD::S(C)
        • S(h);N_GUARD::S(C)
      • Refutation
        • S(b);
    • Try
      • S(C);
      • Threat
        • QAB(F)
      • Vars
        • P(e);OGATEB,XS(E)::QAR2(F)
        • S(b);N_GUARD::S(C),XS(b)
        • S(h);N_GUARD::S(C)
      • Refutation
        • Q(a);
  • Actual
    • S(C);
    • Threat
      • QAB(F)
    • Vars
      • P(f);OGATEB,XS(C)::QAB(F)
      • Q(a);N_GUARD::QAB(F),XS(b)
      • S(b);N_GUARD::S(C)
      • S(h);N_GUARD::S(C),XS(h)
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