MESON Chess Problem Database

Problem Display
PID: 271514 (8/pB2p3/Rb6/4kNK1/3p4/B2pnpP1/3N1r2/4Q3 w - - 0 1)

Stallybrass, Don HR

The Problemist, 1956

8/pB2p3/Rb6/4kNK1/3p4/B2pnpP1/3N1r2/4Q3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Sc4#
    • 1...Bc5
      • 2.Sc4#
    • 1...Bc7
      • 2.Sc4#
    • 1...Bd8
      • 2.Sc4#
    • 1...e6
      • 2.Sc4#
      • 2.Bd6#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Sc4#
      • 1...Re2
        • 2.Sxf3#
      • 1...Rxd2!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Qxe3#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Bxd4
        • 2.Sc4#
      • 1...Re2
        • 2.S2xf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(g);::S(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(B)
      • Vars
        • R(a);N_GUARD,N_SPINS(c)::S(B),XP(d)
      • Refutation
        • R(a);XS(B)
  • Actual
    • S(E);XP(e)
    • Threat
      • QAR2(A),XS(c)
    • Vars
      • K(f);N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • B(g);SBLOCK,XS(E)::S(B)
      • R(a);N_GUARD,N_SPINS(c)::S(B),XP(d)
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