MESON Chess Problem Database

Problem Display
PID: 24892 (8/3N4/3NppK1/bB1kP3/8/4P3/2Pn1P2/8 w - - 0 1)

Pradignat, Emile Leonard

Ruy Lopez, 1899

8/3N4/3NppK1/bB1kP3/8/4P3/2Pn1P2/8

#2

8 + 5

3360 Simple Two-move Themes 1924
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.c4#
    • 1...Sf1
      • 2.c4#
    • 1...Sb3
      • 2.c4#
    • 1...Sf3
      • 2.c4#
    • 1...Se4
      • 2.c4#
  • Tries
    • 1.Sxf6+?
      • 1...Kxe5
        • 2.Sf7#
      • 1...Kc5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sexf6#
      • 1...Kxe4
        • 2.Bc6#
      • 1...Sxe4
        • 2.c4#
      • 1...fxe5
        • 2.Sdf6#
      • 1...Bd8
        • 2.Sc3#
      • 1...f5
        • 2.Sef6#

This anticipates 189474(1911), 196840(1919)

This is a version

There are these versions: 178115

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::P(A)
  • Tries
    • Try
      • S(H);CHECK,XP(e)
      • Vars
        • K(c);P-FLIGHT,XP(E)::S(F)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F),XP(e)
    • Vars
      • K(c);S_FLIGHT,XS(F)::B(D)
      • S(a);N_GUARD,SBLOCK,XS(F)::P(A)
      • P(e);SBLOCK,XP(E)::S(H)
      • B(b);N_GUARD::S(F)
      • P(e);::S(F)
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