MESON Chess Problem Database

Problem Display
PID: 56793 (R3n2K/4k3/7N/P3BB2/2N5/8/8/8 w - - 0 1)

Loyd, Sam

St. Louis Globe Democrat, 1879

R3n2K/4k3/7N/P3BB2/2N5/8/8/8

#2

7 + 2

5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Bd6#
    • 1...Sf6
      • 2.Bd6#
  • Tries
    • 1.Bf4?
      • 1...Kf8
        • 2.Bd6#
      • 1...Sd6
        • 2.Bg5#
      • 1...Sf6
        • 2.Bd6#
      • 1...Sc7
        • 2.Bg5#
      • 1...Sg7
        • 2.Bg5#
      • 1...Kf6!
    • 1.Ra7+?
      • 1...Kd8
        • 2.Sf7#
      • 1...Kf8
        • 2.Rf7#
      • 1...Sc7!
  • Keys
    • 1.Bg3!
      • 1...Kf6
        • 2.Bh4#
      • 1...Kf8
        • 2.Bd6#
      • 1...Sd6
        • 2.Bh4#
      • 1...Sf6
        • 2.Bd6#
      • 1...Sc7
        • 2.Bh4#
      • 1...Sg7
        • 2.Bh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINS(b),S_FLIGHT::B(C)
    • S(b);N_GUARD,SBLOCK::B(C)
  • Tries
    • Try
      • B(C);
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT::B(C)
        • S(b);N_GUARD::B(C)
        • S(b);N_GUARD,SBLOCK::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);OGATE,S_FLIGHT::R1(F)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • B(C);
    • Vars
      • K(a);S_FLIGHT::B(C)
      • K(a);P_SPINS(b),S_FLIGHT::B(C)
      • S(b);N_GUARD::B(C)
      • S(b);N_GUARD,SBLOCK::B(C)
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