MESON Chess Problem Database

Problem Display
PID: 230406 (4B3/4k1NK/5R2/4B3/8/8/8/8 w - - 0 1)

Riczu, Lajos

Deutsche Schachzeitung, 1973

4B3/4k1NK/5R2/4B3/8/8/8/8

#2

5 + 1

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Ra6?
      • 1...Kf8
        • 2.Bd6#
      • 1...Kd8!
    • 1.Rb6?
      • 1...Kf8
        • 2.Bd6#
      • 1...Kd8!
    • 1.Re6+?
      • 1...Kf8
        • 2.Bd6#
      • 1...Kd8!
    • 1.Rg6?
      • 1...Kf8
        • 2.Bd6#
      • 1...Kd8!
    • 1.Rh6?
      • 1...Kf8
        • 2.Bd6#
      • 1...Kd8!
    • 1.Rf8?
      • 1...Kxf8
        • 2.Bd6#
      • 1...Kd8!
  • Keys
    • 1.Rc6!
      • 1...Kd8
        • 2.Bf6#
      • 1...Kf8
        • 2.Bd6#

Anticipated by 222445(1884), 181779(1910), 201343(1922), 205509(1925), 176177(1962)

This anticipates 136399(1981/5), 222223(1982)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT,XR(B)::B(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(a);S_FLIGHT::B(A)
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