MESON Chess Problem Database

Problem Display
PID: 102779 (8/3p3B/K1N5/n7/p1kP4/8/6Q1/1N1nB3 w - - 0 1)

Mackenzie, Arthur Ford

Revue d'Echecs, 1904

8/3p3B/K1N5/n7/p1kP4/8/6Q1/1N1nB3

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Sxa5#
      • 2.Qc2#
    • 1...Sc3
      • 2.Sd2#
    • 1...Sb3
      • 2.Sa3#
    • 1...Sb7
      • 2.Qa2#
  • Tries
    • 1.Se5+?
      • 1...Kb3
        • 2.Qc2#
      • 1...Kxd4!
    • 1.Bxa5?
      • threat
        • 2.Sd2#
        • 2.Qa2#
      • 1...Kb3
        • 2.Qc2#
      • 1...Sb2
        • 2.Sd2#
      • 1...Sf2
        • 2.Sd2#
      • 1...Sc3
        • 2.Sd2#
      • 1...dxc6!
    • 1.Bd3+?
      • 1...Kb3
        • 2.Sxa5#
        • 2.Qc2#
      • 1...Kxd3!
    • 1.Qe2+?
      • 1...Kb3
        • 2.Sxa5#
        • 2.Qc2#
      • 1...Kd5!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Sxa5#
      • 1...Kb3
        • 2.Sxa5#
      • 1...Sxc3
        • 2.Sd2#
      • 1...Sxc6
        • 2.Qa2#
      • 1...dxc6
        • 2.Qg8#
      • 1...Sb3
        • 2.Se5#
      • 1...Sb7
        • 2.Qa2#

FEATURES

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