MESON Chess Problem Database

Problem Display
PID: 226637 (2N1k1K1/1R1rB3/8/8/8/8/8/3R4 w - - 0 1)

Hogrefe, Max

Deutsche Schachzeitung, 1928

2N1k1K1/1R1rB3/8/8/8/8/8/3R4

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rxb7
      • 2.Rd8#
    • 1...Rc7
      • 2.Rd8#
    • 1...Rxe7
      • 2.Rxe7#
    • 1...Rd8
      • 2.Rxd8#
  • Tries
    • 1.Rd5?
      • 1...Rxb7
        • 2.Rd8#
      • 1...Rxe7
        • 2.Rxe7#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Rc7
        • 2.Rd8#
      • 1...Rd8
        • 2.Rxd8#
      • 1...Rxd5!
  • Keys
    • 1.Rd6!
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Rxb7
        • 2.Rd8#
      • 1...Rxe7
        • 2.Rxe7#
      • 1...Rc7
        • 2.Rd8#
      • 1...Rd8
        • 2.Rxd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::S(D),XR(a)
    • R(a);OGATE,XR(B)::R1(A)
    • R(a);OGATE::R1(A)
    • R(a);OGATE,XB(C)::R1(B),XR(a)
    • R(a);OGATE::R1(A),XR(a)
  • Tries
    • Try
      • R(A);
      • Vars
        • R(a);OGATE,XR(B)::R1(A)
        • R(a);OGATE,XB(C)::R1(B),XR(a)
        • R(a);N_GUARD::S(D),XR(a)
        • R(a);OGATE::R1(A)
        • R(a);OGATE::R1(A),XR(a)
      • Refutation
        • R(a);XR(A)
  • Actual
    • R(A);
    • Vars
      • R(a);XR(A)::S(D),XR(a)
      • R(a);OGATE,XR(B)::R1(A)
      • R(a);OGATE,XB(C)::R1(B),XR(a)
      • R(a);OGATE::R1(A)
      • R(a);OGATE::R1(A),XR(a)
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