MESON Chess Problem Database

Problem Display
PID: 188652 (2B5/5r2/3nN3/3pq3/3BkP2/1n4RP/2P2R1K/5N2 w - - 0 1)

Alexander, Frederick Forrest Lawrie

To Alain White, 1945

2B5/5r2/3nN3/3pq3/3BkP2/1n4RP/2P2R1K/5N2

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sg5#
    • 1...Qf5
      • 2.Re2#
      • 2.Re3#
    • 1...Rf5
      • 2.Re2#
      • 2.Re3#
    • 1...Sxd4
      • 2.Sc5#
  • Tries
    • 1.Sd2+?
      • 1...Kf5
        • 2.fxe5#
      • 1...Sxd2!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Sg3#
      • 1...Kf5
        • 2.fxe5#
      • 1...Qxd4
        • 2.Sg5#
      • 1...Qxe6
        • 2.f5#
      • 1...Sxd4
        • 2.Sc5#
      • 1...Sf5
        • 2.fxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(d);N_GUARD,SBLOCK,XB(G)::S(I)
    • S(a);N_GUARD,SBLOCK,XB(G)::S(I)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(b);S_FLIGHT::R(C)+P(H),XQ(d)
      • Refutation
        • S(a);XS(A)
  • Actual
    • R(E);P_SPINP(H)
    • Threat
      • S(A)
    • Vars
      • K(b);S_FLIGHT::R(C)+P(H),XQ(d)
      • Q(d);N_GUARD,N_PINP(H),SBLOCK,XB(G)::S(I)
      • Q(d);N_PINP(H),XS(I)::R(E)+P(H)
      • S(a);N_GUARD,SBLOCK,XB(G)::S(I)
      • S(e);S_CUTR(f)::R(E)+P(H),XQ(d)
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