MESON Chess Problem Database

Problem Display
PID: 73592 (1N1krN2/3pp3/1PR5/3B1R2/4K3/8/8/8 w - - 0 1)

Schreckenbach, Michael

Freie Presse, 1993

1N1krN2/3pp3/1PR5/3B1R2/4K3/8/8/8

#2

7 + 4

6113 Problemschach-Jahrbuch (1993) 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf8
      • 2.Rxf8#
    • 1...d6
      • 2.Se6#
  • Tries
    • 1.Rf7?
      • 1...Rxf8
        • 2.Rxf8#
      • 1...d6
        • 2.Se6#
      • 1...e5
        • 2.Rxd7#
      • 1...e6
        • 2.Rxd7#
      • 1...dxc6!
  • Keys
    • 1.Be6!
      • 1...d5+
        • 2.Rxd5#
      • 1...Rxf8
        • 2.Rxf8#
      • 1...dxc6
        • 2.Sxc6#
      • 1...dxe6
        • 2.Sxe6#
      • 1...d6
        • 2.Rc8#

This is after

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATE,XS(G)::R(C),XR(d)
    • P(a);N_GUARD::S(G)
  • Tries
    • Try
      • R(C);
      • Vars
        • R(d);OGATE,XS(G)::R(C),XR(d)
        • P(a);N_GUARD::S(G)
        • P(b);OGATE::R1(C),XP(a)
      • Refutation
        • P(a);XR(E)
  • Actual
    • B(B);
    • Vars
      • P(a);CHECK,OGATEB::R(C),XP(a)
      • R(d);OGATE,XS(G)::R(C),XR(d)
      • P(a);XR(E)::S(F),XP(a)
      • P(a);XB(B)::S(G),XP(a)
      • P(a);::R1(E)
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