MESON Chess Problem Database

Problem Display
PID: 180227 (8/1N2P3/2n5/8/k7/8/NK6/5B2 w - - 0 1)

Lider, Valentin Viktorovich

Bulletin of the Central Chess Club of USSR, 1969

8/1N2P3/2n5/8/k7/8/NK6/5B2

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sc3#
    • 1...Sa5
      • 2.Sc5#
  • Keys
    • 1.e8R!
      • 1...Sd4
        • 2.Ra8#
      • 1...Sb4
        • 2.Sc3#
      • 1...Sa5
        • 2.Sc5#
      • 1...Se5
        • 2.Ra8#
      • 1...Sa7
        • 2.Re4#
      • 1...Se7
        • 2.Ra8#
      • 1...Sb8
        • 2.Re4#
      • 1...Sd8
        • 2.Re4#

Anticipated by 21725(1920), 17916(1951), 74082(1954), 18405(1955)

This anticipates 252994(1983)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::S(B)
    • S(b);SBLOCK::S(D)
  • Actual
    • P(E);
    • Vars
      • S(b);N_GUARD::R(E)
      • S(b);SBLOCK::S(B)
      • S(b);SBLOCK::S(D)
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