MESON Chess Problem Database

Problem Display
PID: 48745 (5N2/1Q6/6n1/R3NkP1/2p2P2/3n2p1/2B4p/K4R2 w - - 0 1)

Cristoffanini, Guido

2nd Prize, Bristol Times and Mirror, 1932/I

5N2/1Q6/6n1/R3NkP1/2p2P2/3n2p1/2B4p/K4R2

#2

9 + 6

371 The Chess Review 1933
133 The Problemist Supplement 2007

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Bxd3#
  • Tries
    • 1.Sxd3+?
      • 1...Se5
        • 2.Sxe5#
      • 1...Kg4!
    • 1.Sxc4+?
      • 1...Se5
        • 2.Se3#
      • 1...Kg4!
    • 1.Sg4+?
      • 1...Se5
        • 2.Se3#
        • 2.Sh6#
      • 1...Kxg4!
    • 1.Sf7+?
      • 1...Se5
        • 2.Sh6#
      • 1...Kg4!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Bg4#
      • 1...Sdxf4
        • 2.Sexg6#
      • 1...Sdxe5
        • 2.Qb1#
      • 1...Sgxf4
        • 2.Sxd3#
      • 1...Sgxe5
        • 2.Qh7#
      • 1...Sf2
        • 2.Sexg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::B(C),XS(b)
  • Tries
    • Try
      • S(F);CHECK,XS(b)
      • Vars
        • S(f);P_SPINS(f)::B(C)+S(F),XS(f)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(F);CHECK,XP(d)
      • Vars
        • S(f);::S(F)
      • Refutation
        • K(e);N_SPINS(b),S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(e);N_SPINS(b),S_FLIGHT,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • S(f);::S(F)
      • Refutation
        • K(e);N_SPINS(b),S_FLIGHT
  • Actual
    • B(C);N_PINS(b)
    • Threat
      • B(C)
    • Vars
      • S(b);N_GUARD,P_SPINS(b),XP(D)::R(E)+S(F),XS(f)
      • S(b);OGATEB,P_SPINS(b),XS(F)::QAB(H)
      • S(f);N_GUARD,P_SPINS(f),XP(D)::R(E)+S(F),XS(b)
      • S(f);OGATEB,P_SPINS(f),XS(F)::QAB(H)
      • S(b);N_GUARD::R(E)+S(F),XS(f)
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