MESON Chess Problem Database

Problem Display
PID: 120665 (6B1/4Q3/P3n3/2Nk4/8/1p2P3/4K3/8 w - - 0 1)

McGregor, John NO

Toronto Globe, 1882

6B1/4Q3/P3n3/2Nk4/8/1p2P3/4K3/8

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qxe6#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Kc6!
    • 1.Sa4?
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kc6!
    • 1.Sxe6?
      • threat
        • 2.Sd4#
        • 2.Sd8#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Sd4#
        • 2.Sg7#
      • 1...Ke5
        • 2.Sd4#
        • 2.Sg7#
      • 1...Kc6!
    • 1.Sb7?
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kc6!
    • 1.Sd7?
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Kc6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kc6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(E),XS(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(E),XS(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAR2(E),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAB1(E),XS(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAR2(E),XS(c)
        • K(b);P-FLIGHT::QAR1(E),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • S(C);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAB1(E),XS(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAR2(E),XS(c)
        • K(b);P-FLIGHT::QAR1(E),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAB1(E),XS(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAR2(E),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB1(E),XS(c)
    • Vars
      • K(b);S_FLIGHT::QAR1(E)
      • K(b);S_FLIGHT,XS(C)::QAR2(E),XS(c)
      • K(b);P-FLIGHT::QAR1(E),XS(c)
      • K(b);N_SPINS(c),S_FLIGHT::QAB1(E)
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