MESON Chess Problem Database

Problem Display
PID: 224595 (N7/3p4/3p4/2pk4/Pp6/1N3R1B/4K3/5R2 w - - 0 1)

Keeble, John Frederick

English Mechanic and World of Science, 1888

(First published on Fri Mar 16 1888)

N7/3p4/3p4/2pk4/Pp6/1N3R1B/4K3/5R2

#2

7 + 5

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sb6#
  • Tries
    • 1.Sb6+?
      • 1...Ke4
        • 2.Re3#
      • 1...Ke5
        • 2.Re3#
      • 1...Kc6!
    • 1.Sc7+?
      • 1...Kc4
        • 2.Rc1#
      • 1...Ke4
        • 2.Re3#
      • 1...Ke5
        • 2.Re3#
      • 1...Kc6!
    • 1.Re3?
      • 1...Kc4
        • 2.Sb6#
      • 1...c4
        • 2.Bg2#
      • 1...Kc6!
  • Keys
    • 1.Bg2!
      • 1...Kc4
        • 2.Sb6#
      • 1...Ke4
        • 2.Re3#
        • 2.Rf5#
      • 1...Ke5
        • 2.Re3#
      • 1...Kc6
        • 2.Rf6#
      • 1...Ke6
        • 2.Re3#
      • 1...c4
        • 2.Re3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(D)
        • K(c);P-FLIGHT::R(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_FLIGHT::R(A)
        • K(c);S_FLIGHT::R1(D)
        • K(c);P-FLIGHT::R(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(c);S_FLIGHT::S(G)
        • P(b);SBLOCK::B(E)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • B(E);
    • Vars
      • K(c);S_FLIGHT::S(G)
      • K(c);P-FLIGHT::R(D)
      • K(c);S_FLIGHT::B(E)+R(D)
      • K(c);S_FLIGHT::R(D)
      • P(b);SBLOCK::B(E)+R(D)
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