MESON Chess Problem Database

Problem Display
PID: 868 (2BB4/1NP1NK2/1k3P2/RPr5/8/1Pp5/2P5/R7 w - - 0 1)

Beal, Edward W

British Chess Magazine, 1993

2BB4/1NP1NK2/1k3P2/RPr5/8/1Pp5/2P5/R7

#2

12 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Sd5#
    • 1...Rxb5
      • 2.Ra6#
    • 1...Rd5
      • 2.Sxd5#
    • 1...Rc6
      • 2.Sd5#
  • Tries
    • 1.Re1?
      • 1...Rxb5
        • 2.Re6#
      • 1...Rxc7
        • 2.Re6#
      • 1...Rc4
        • 2.Sd5#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Rf5
        • 2.Re6#
      • 1...Rg5
        • 2.Re6#
      • 1...Rh5
        • 2.Re6#
      • 1...Rc6
        • 2.Sd5#
      • 1...Re5!
  • Keys
    • 1.Rd1!
      • 1...Rxb5
        • 2.Rd6#
      • 1...Rxc7
        • 2.Rd6#
      • 1...Re5
        • 2.Rd6#
      • 1...Rc4
        • 2.Sd5#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Rf5
        • 2.Rd6#
      • 1...Rg5
        • 2.Rd6#
      • 1...Rh5
        • 2.Rd6#
      • 1...Rc6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::S(I)
    • R(b);SBLOCK,XP(E)::R1(D)
    • R(b);N_GUARD::S(I),XR(b)
  • Tries
    • Try
      • R(A);
      • Vars
        • R(b);N_GUARD,XP(E)::R(A)
        • R(b);N_GUARD,P_PINS(I),P_SPINR(b),XP(H)::R(A)
        • R(b);N_GUARD::S(I)
        • R(b);N_GUARD::S(I),XR(b)
        • R(b);N_GUARD,P_PINP(F)::R(A)
        • R(b);N_GUARD::R(A)
      • Refutation
        • R(b);
  • Actual
    • R(A);
    • Vars
      • R(b);N_GUARD,XP(E)::R(A)
      • R(b);N_GUARD,P_PINS(I),P_SPINR(b),XP(H)::R(A)
      • R(b);N_GUARD::R(A)
      • R(b);N_GUARD::S(I)
      • R(b);N_GUARD::S(I),XR(b)
      • R(b);N_GUARD,P_PINP(F)::R(A)
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