MESON Chess Problem Database

Problem Display
PID: 217603 (8/3p3p/1p1N1P1P/1K2k3/2Q2N2/8/3P3P/8 w - - 0 1)

Miles, John Augustus

English Mechanic and World of Science, 1873

(First published on Fri Mar 28 1873)

8/3p3p/1p1N1P1P/1K2k3/2Q2N2/8/3P3P/8

#2

8 + 4

508 Chess Chips 1878
23 Die Schwalbe 2017
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kxb6?
      • 1...Kxd6
        • 2.Qd5#
        • 2.Qd4#
        • 2.Qc5#
        • 2.Qc7#
      • 1...Kxf6!
    • 1.Qd3?
      • 1...Kxf4
        • 2.Qf5#
        • 2.Qg3#
      • 1...Kxf6!
    • 1.Qd5+?
      • 1...Kxf4
        • 2.Qf5#
      • 1...Kxf6!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Sf5#
        • 2.Qd5#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kxf4
        • 2.Qf5#
      • 1...dxe6!
    • 1.Qc3+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6!
  • Keys
    • 1.Qg8!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);P-FLIGHT,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(C);
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • K(a);OGATEB,S_FLIGHT,XS(F)::QAB(C)
      • K(a);OGATEB,S_FLIGHT,XP(G)::QAB1(C)
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