MESON Chess Problem Database

Problem Display
PID: 82079 (1B1R1N1r/7p/4pr2/1KNp4/p1Pk4/b6b/3P4/1B6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemnoter, 1960

1B1R1N1r/7p/4pr2/1KNp4/p1Pk4/b6b/3P4/1B6

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Scxe6#
      • 2.Sfxe6#
    • 1...e5
      • 2.Rxd5#
  • Tries
    • 1.Scxe6+?
      • 1...Rxe6
        • 2.Rxd5#
      • 1...Bxe6!
    • 1.Scd7?
      • threat
        • 2.Be5#
      • 1...dxc4
        • 2.Sc5#
      • 1...Rf5
        • 2.Sxe6#
      • 1...e5
        • 2.Bxe5#
      • 1...Bd6!
    • 1.Sfxe6+?
      • 1...Rxe6
        • 2.Rxd5#
      • 1...Bxe6!
  • Keys
    • 1.Sfd7!
      • threat
        • 2.Be5#
      • 1...dxc4
        • 2.Sf8#
      • 1...Rf5
        • 2.Sxe6#
      • 1...e5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(f);N_GUARD::R1(G),XP(e)
  • Tries
    • Try
      • S(E);CHECK,XP(f)
      • Vars
        • R(g);XS(E)::R1(G),XP(e)
      • Refutation
        • B(b);XS(E)
    • Try
      • S(E);N_PINP(e)
      • Threat
        • B(F)
      • Vars
        • P(e);XP(C)::R(G)+S(E)
        • R(g);N_GUARD,S_CUTB(b)::S(H),XP(f)
        • P(f);::B(F),XP(f)
      • Refutation
        • B(a);
    • Try
      • S(H);CHECK,XP(f)
      • Vars
        • R(g);XS(H)::R1(G),XP(e)
      • Refutation
        • B(b);XS(H)
  • Actual
    • S(H);N_PINP(e)
    • Threat
      • B(F)
    • Vars
      • P(e);XP(C)::R(G)+S(H)
      • R(g);N_GUARD,S_CUTB(b)::S(E),XP(f)
      • P(f);::B(F),XP(f)
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