MESON Chess Problem Database

Problem Display
PID: 100997 (1bn5/B3p3/8/r3k1Nb/BPP2R2/6K1/3R4/8 w - - 0 1)

Heftman, Hyman

Good Companions, 1921

1bn5/B3p3/8/r3k1Nb/BPP2R2/6K1/3R4/8

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Rd5#
    • 1...Rd5
      • 2.Rxd5#
    • 1...Ra6
      • 2.Rd5#
    • 1...Rxa7
      • 2.Rd5#
    • 1...Bd6
      • 2.Bd4#
    • 1...Sb6
      • 2.Bxb8#
    • 1...Sd6
      • 2.Bd4#
  • Tries
    • 1.Sf3+?
      • 1...Ke6
        • 2.Bd7#
      • 1...Bxf3!
    • 1.Sf7+?
      • 1...Ke6
        • 2.Bd7#
      • 1...Bxf7!
    • 1.Re2+?
      • 1...Kd6
        • 2.Bxb8#
      • 1...Bxe2!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Re6#
      • 1...Kxd6
        • 2.Bxb8#
      • 1...Bxd6
        • 2.Bd4#
      • 1...Sxd6
        • 2.Bd4#
      • 1...exd6
        • 2.Bd4#
      • 1...Ra6
        • 2.Rd5#
      • 1...Bg4
        • 2.Sf7#
      • 1...Bf7
        • 2.Sxf7#
      • 1...e6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD,XB(C)::R1(A)
    • R(a);N_GUARD::R1(A),XR(a)
    • R(a);N_GUARD::R1(A)
    • R(a);N_GUARD,XB(H)::R1(A)
    • B(e);SBLOCK::B(H)
    • S(f);N_GUARD::B(H),XB(e)
    • S(f);SBLOCK::B(H)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_PINR(F)::B(C)
      • Refutation
        • B(c);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_PINR(F)::B(C)
      • Refutation
        • B(c);XS(G)
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::B(H),XB(e)
      • Refutation
        • B(c);XR(A)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(A)::B(H),XB(e)
      • B(e);SBLOCK,XR(A)::B(H)
      • S(f);SBLOCK,XR(A)::B(H)
      • P(d);SBLOCK,XR(A)::B(H)
      • R(a);N_GUARD::R1(A)
      • B(c);N_GUARD::S(G)
      • B(c);N_GUARD::S(G),XB(c)
      • P(d);::R1(A),XP(d)
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