MESON Chess Problem Database

Problem Display
PID: 212404 (nn6/1BRp4/2b5/1p1kpP2/1P1pN3/2PK4/1N6/8 w - - 0 1)

Overath, Lothar

Badische Neueste Nachrichten, 1978

nn6/1BRp4/2b5/1p1kpP2/1P1pN3/2PK4/1N6/8

#2

8 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb7
      • 2.Rc5#
    • 1...Sa6
      • 2.Rxd7#
    • 1...d6
      • 2.Sf6#
  • Tries
    • 1.Bxc6+?
      • 1...Sxc6
        • 2.Rxd7#
      • 1...dxc6!
    • 1.Bxa8?
      • 1...Bxa8
        • 2.Rc5#
      • 1...Bb7
        • 2.Rc5#
      • 1...Sa6
        • 2.Rxd7#
      • 1...d6
        • 2.Sf6#
      • 1...dxc3!
  • Keys
    • 1.Sa4!
      • 1...Bxb7
        • 2.Rc5#
      • 1...Sxc7
        • 2.Sb6#
      • 1...dxc3
        • 2.Saxc3#
      • 1...bxa4
        • 2.c4#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sa6
        • 2.Rxd7#
      • 1...d6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(e);N_SPINB(e),OGATE,XB(G)::R1(H)
    • S(h);N_GUARD::R(H),XP(f)
    • P(f);SBLOCK::S(E)
  • Tries
    • Try
      • B(G);CHECK,XB(e)
      • Vars
        • S(h);SBLOCK,XB(G)::R(H),XP(f)
      • Refutation
        • P(f);XB(G)
    • Try
      • B(G);XS(g)
      • Vars
        • B(e);N_SPINB(e),OGATE,XB(G)::R1(H)
        • B(e);OGATE::R1(H)
        • S(h);N_GUARD::R(H),XP(f)
        • P(f);SBLOCK::S(E)
      • Refutation
        • P(a);XP(B)
  • Actual
    • S(A);
    • Vars
      • B(e);N_SPINB(e),OGATE,XB(G)::R1(H)
      • S(g);N_GUARD,XR(H)::S(A)
      • P(a);XP(B)::S(A),XP(a)
      • P(b);N_GUARD,XS(A)::P(B)
      • S(g);N_GUARD::S(A),XS(g)
      • S(h);N_GUARD::R(H),XP(f)
      • P(f);SBLOCK::S(E)
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