MESON Chess Problem Database

Problem Display
PID: 274972 (8/B4N2/2Rp1R2/8/4kbn1/1BPp1p2/3p1p2/5N1K w - - 0 1)

Hersom, Donald H

The Problemist, 1933

8/B4N2/2Rp1R2/8/4kbn1/1BPp1p2/3p1p2/5N1K

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Sxd2#
    • 1...Be3
      • 2.Sg3#
    • 1...Bg3
      • 2.Sxd2#
      • 2.Sxg3#
    • 1...Be5
      • 2.Sxd2#
      • 2.Sg5#
    • 1...Bg5
      • 2.Sg3#
    • 1...Bh6
      • 2.Sg3#
    • 1...Se3
      • 2.Sxd2#
    • 1...Se5
      • 2.Sxd6#
  • Tries
    • 1.Sg5+?
      • 1...Ke5
        • 2.Bd4#
      • 1...Bxg5!
    • 1.Sxd6+?
      • 1...Ke5
        • 2.Bd4#
        • 2.Rf5#
        • 2.Re6#
      • 1...Bxd6!
    • 1.Rcxd6?
      • threat
        • 2.Bd5#
        • 2.Rd4#
      • 1...Bxd6
        • 2.Sxd2#
      • 1...Be3
        • 2.Sg3#
        • 2.Bd5#
      • 1...Be5
        • 2.Sxd2#
        • 2.Sg5#
        • 2.Bd5#
      • 1...Se3
        • 2.Sxd2#
        • 2.Rd4#
      • 1...Sxf6!
  • Keys
    • 1.Be6!
      • threat
        • 2.Rc4#
      • 1...Be3
        • 2.Sg3#
      • 1...Be5
        • 2.Sxd2#
        • 2.Sg5#
      • 1...Se3
        • 2.Sxd2#
      • 1...Se5
        • 2.Sxd6#
      • 1...d5
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD::S(A),XP(a)
    • B(f);N_GUARD::S(A)
    • S(g);S_CUTB(f)::S(A),XP(a)
    • S(g);SBLOCK,S_CUTB(f)::S(H),XP(h)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,S_CUTB(f)::B(G)
      • Refutation
        • B(f);XS(H)
    • Try
      • S(H);CHECK,XP(h)
      • Refutation
        • B(f);XS(H)
    • Try
      • R(E);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);N_GUARD,XR(E)::S(A),XP(a)
      • Refutation
        • S(g);XR(F)
  • Actual
    • B(C);
    • Threat
      • R(E)
    • Vars
      • B(f);N_GUARD::S(A)
      • S(g);S_CUTB(f)::S(A),XP(a)
      • S(g);SBLOCK,S_CUTB(f)::S(H),XP(h)
      • P(h);SBLOCK::B(C)
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