MESON Chess Problem Database

Problem Display
PID: 73354 (3nQ3/6N1/6Kn/1Npk4/5P2/4b3/4B3/8 w - - 0 1)

Kallaway, AF

Chess Amateur (The), 1910

3nQ3/6N1/6Kn/1Npk4/5P2/4b3/4B3/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
      • 2.Qa8#
    • 1...Sb7
      • 2.Qe6#
    • 1...Sf7
      • 2.Qe6#
      • 2.Qa8#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Kd6!
    • 1.Sc7+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Kd6!
    • 1.Bd3?
      • threat
        • 2.Qd7#
        • 2.Qe4#
      • 1...Bxf4
        • 2.Qe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Shf7
        • 2.Qe4#
      • 1...Se6
        • 2.Qd7#
        • 2.Qxe6#
        • 2.Qa8#
      • 1...Sb7
        • 2.Qe4#
        • 2.Qe6#
      • 1...Sdf7
        • 2.Qe4#
        • 2.Qe6#
        • 2.Qa8#
      • 1...c4!
    • 1.Qxe3?
      • threat
        • 2.Qf3#
      • 1...c4
        • 2.Bf3#
      • 1...Kc6!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sec7#
      • 1...Ke4
        • 2.Sc3#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...Sxe6
        • 2.Qa8#
      • 1...c4
        • 2.Bf3#

FEATURES

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