MESON Chess Problem Database

Problem Display
PID: 151800 (N1k1K3/2B2pRP/P1R3Pr/5P2/2r1p3/3p3B/2q2b2/8 w - - 0 1)

Allison, Christopher John

Chess, 1958

N1k1K3/2B2pRP/P1R3Pr/5P2/2r1p3/3p3B/2q2b2/8

#2

10 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sb6#
    • 1...Rc5
      • 2.Sb6#
    • 1...Be1
      • 2.Sb6#
    • 1...Bg3
      • 2.Sb6#
    • 1...Bh4
      • 2.Sb6#
      • 2.f6#
    • 1...Bc5
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bf4#
      • 2.Be5#
      • 2.Bd6#
    • 1...Bb6
      • 2.Sxb6#
    • 1...e3
      • 2.Sb6#
  • Tries
    • 1.Rg8?
      • threat
        • 2.Ke7#
      • 1...Rd4
        • 2.Sb6#
      • 1...Bh4
        • 2.Sb6#
        • 2.f6#
      • 1...Bc5
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Be5#
        • 2.Bd6#
      • 1...Rxg6!
  • Keys
    • 1.Ke7!
      • threat
        • 2.Rg8#
      • 1...Bh4+
        • 2.f6#
      • 1...Bc5+
        • 2.Bd6#
      • 1...Rxg6
        • 2.h8Q#
        • 2.h8R#
      • 1...Rd4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(d);S_CUTB(b)::S(I)
    • B(b);N_GUARD::S(I)
    • B(b);N_GUARD::S(I),XB(b)
    • P(e);S_CUTB(b)::S(I)
  • Tries
    • Try
      • R(G);
      • Threat
        • R(G)+K(J)
      • Vars
        • R(d);S_CUTB(b)::S(I)
      • Refutation
        • R(f);XP(E)
  • Actual
    • K(J);P-FLIGHT
    • Threat
      • R(G)
    • Vars
      • B(b);CHECK,S_CUTR(f)::B(A)+P(B)
      • B(b);CHECK,S_CUTR(d)::R(D)+B(F)
      • R(f);N_GUARD,XP(E)::P=Q
      • R(d);S_CUTB(b)::S(I)
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