MESON Chess Problem Database

Problem Display
PID: 18405 (8/1Q1N2P1/4n3/8/2k5/5N2/3K4/8 w - - 0 1)

Korponai, Jozsef

2nd Place, Sztalinvarosi Hirlap, 1955

8/1Q1N2P1/4n3/8/2k5/5N2/3K4/8

#2

5 + 2

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Sfe5#
    • 1...Sc5
      • 2.Sde5#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Qb3#
      • 1...Sc5
        • 2.Sde5#
      • 1...Sd4+!
  • Keys
    • 1.g8R!
      • 1...Sd4
        • 2.Sfe5#
      • 1...Sf4
        • 2.Rc8#
      • 1...Sc5
        • 2.Sde5#
      • 1...Sg5
        • 2.Rc8#
      • 1...Sc7
        • 2.Rg4#
      • 1...Sg7
        • 2.Rc8#
      • 1...Sd8
        • 2.Rg4#
      • 1...Sf8
        • 2.Rg4#

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

This anticipates 180227(1969), 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)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • S(b);SBLOCK::S(D)
      • Refutation
        • S(b);CHECK
  • Actual
    • P(E);
    • Vars
      • S(b);SBLOCK::S(B)
      • S(b);N_GUARD::R(E)
      • S(b);SBLOCK::S(D)
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