MESON Chess Problem Database

Problem Display
PID: 78339 (1B6/3B4/1p1n4/k1N5/3N4/1K6/8/8 w - - 0 1)

Lunn, Peter

The Tablet, 1958

(First published on Sat Nov 1 1958)

1B6/3B4/1p1n4/k1N5/3N4/1K6/8/8

#2

5 + 3

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Sc6#
    • 1...b5
      • 2.Bc7#
  • Tries
    • 1.Ba4?
      • threat
        • 2.Sc6#
      • 1...b5
        • 2.Bc7#
      • 1...bxc5!
    • 1.Bxd6?
      • 1...b5
        • 2.Bc7#
      • 1...bxc5!
  • Keys
    • 1.Bb5!
      • 1...Sxb5
        • 2.Sc6#
      • 1...bxc5
        • 2.Bc7#
      • 1...Sc4
        • 2.Sb7#
      • 1...Se4
        • 2.Sb7#
      • 1...Sf5
        • 2.Sb7#
      • 1...Sb7
        • 2.Sxb7#
      • 1...Sf7
        • 2.Sb7#
      • 1...Sc8
        • 2.Sb7#
      • 1...Se8
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • S(c);SBLOCK::S(B)
    • P(b);OGATEB::B(E)
  • Tries
    • Try
      • B(D);
      • Threat
        • S(B)
      • Vars
        • P(b);OGATEB::B(E)
      • Refutation
        • P(b);XS(C)
    • Try
      • B(E);XS(c)
      • Vars
        • P(b);OGATEB::B(E)
      • Refutation
        • P(b);XS(C)
  • Actual
    • B(D);
    • Vars
      • S(c);SBLOCK,XB(D)::S(B)
      • P(b);OGATEB,XS(C)::B(E)
      • S(c);N_GUARD::S(C)
      • S(c);N_GUARD::S(C),XS(c)
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