MESON Chess Problem Database

Problem Display
PID: 17136 (6n1/p1K1p3/7P/3Nk3/1P3N2/8/2Bp3B/3n2Q1 w - - 0 1)

Mackenzie, Arthur Ford

3rd Prize, Norwood News, 1902

6n1/p1K1p3/7P/3Nk3/1P3N2/8/2Bp3B/3n2Q1

#2

8 + 6

5501 Chess Cameos 1936
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qe3#
    • 1...Sf2
      • 2.Qa1#
    • 1...Se3
      • 2.Qxe3#
      • 2.Qa1#
    • 1...Sxh6
      • 2.Qg7#
  • Tries
    • 1.Se2+?
      • 1...Ke6
        • 2.Qxg8#
      • 1...Kxd5!
    • 1.Sh3+?
      • 1...Ke6
        • 2.Qxg8#
      • 1...Kxd5!
    • 1.Sh5+?
      • 1...Ke6
        • 2.Qxg8#
      • 1...Kxd5!
    • 1.Se6+?
      • 1...Kxe6
        • 2.Qxg8#
      • 1...Kxd5!
    • 1.Sb6?
      • threat
        • 2.Sd7#
      • 1...Kf6
        • 2.Qg7#
      • 1...Sf2
        • 2.Qa1#
      • 1...Se3
        • 2.Qa1#
      • 1...Sf6
        • 2.Sc4#
      • 1...axb6!
    • 1.Sf6?
      • threat
        • 2.Sg4#
        • 2.Sd7#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Sxh6
        • 2.Sd7#
      • 1...exf6
        • 2.Qc5#
      • 1...Sf2
        • 2.Qa1#
      • 1...Se3
        • 2.Qa1#
      • 1...Sxf6!
    • 1.Qxg8?
      • threat
        • 2.Se2#
        • 2.Qg7#
        • 2.Qh8#
      • 1...e6
        • 2.Qg7#
        • 2.Qh8#
      • 1...Kd4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sg4#
      • 1...Kd4
        • 2.Se2#
      • 1...Kf6
        • 2.Qg7#
      • 1...Sxe3
        • 2.Qa1#
      • 1...Sxh6
        • 2.Qg7#
      • 1...Sf2
        • 2.Qa1#
      • 1...Sf6
        • 2.Sc4#

This anticipates 76466(2004)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAR2(A)
    • S(a);OGATE::QAB(A)
    • S(f);N_GUARD,XP(G)::QAB(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(A),XS(f)
      • Refutation
        • K(c);P-FLIGHT,XS(F)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(A),XS(f)
      • Refutation
        • K(c);P-FLIGHT,XS(F)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(A),XS(f)
      • Refutation
        • K(c);P-FLIGHT,XS(F)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAB(A),XS(f)
      • Refutation
        • K(c);P-FLIGHT,XS(F)
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • S(a);OGATE::QAB(A)
        • S(f);SBLOCK::S(F)
      • Refutation
        • P(d);XS(F)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
        • S(f);XP(G)::S(F)
        • P(e);SBLOCK,XS(F)::QAR2(A)
        • S(a);OGATE::QAB(A)
      • Refutation
        • S(f);XS(F)
    • Try
      • Q(A);XS(f)
      • Threat
        • DUALS(3)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(c);S_FLIGHT::S(E)
      • K(c);S_FLIGHT::QAB1(A)
      • S(a);OGATE,XS(F)::QAB(A)
      • S(f);N_GUARD,XP(G)::QAB(A)
      • S(a);OGATE::QAB(A)
      • S(f);SBLOCK::S(F)
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