MESON Chess Problem Database

Problem Display
PID: 56754 (8/2PPk3/2n2R2/2P2B2/2p2R2/2BbK3/8/8 w - - 0 1)

Lazard, Frederic

Bulletin de la FFE, 1924

8/2PPk3/2n2R2/2P2B2/2p2R2/2BbK3/8/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.d8Q#
    • 1...Sd4
      • 2.d8Q#
    • 1...Sa5
      • 2.d8Q#
    • 1...Se5
      • 2.d8Q#
    • 1...Sa7
      • 2.d8Q#
    • 1...Sb8
      • 2.d8Q#
    • 1...Sd8
      • 2.c8S#
  • Tries
    • 1.Re4+?
      • 1...Se5
        • 2.d8Q#
      • 1...Bxe4!
    • 1.Rh4?
      • threat
        • 2.Rh7#
      • 1...Sd4
        • 2.d8Q#
      • 1...Se5
        • 2.d8Q#
      • 1...Sd8
        • 2.c8S#
      • 1...Bxf5!
    • 1.c8Q?
      • threat
        • 2.Qe8#
        • 2.Qf8#
      • 1...Bxf5
        • 2.Qe8#
      • 1...Sd4
        • 2.Qf8#
        • 2.d8Q#
      • 1...Se5
        • 2.Qf8#
        • 2.d8Q#
      • 1...Sd8!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rg7#
      • 1...Sd4
        • 2.d8Q#
      • 1...Se5
        • 2.d8Q#
      • 1...Sd8
        • 2.c8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::P=Q
    • S(c);SBLOCK::P=S
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::P=Q
      • Refutation
        • B(a);XR(C)
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • S(c);N_GUARD::P=Q
        • S(c);SBLOCK::P=S
      • Refutation
        • B(a);XB(E)
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XB(E)::QAR1(G)
      • Refutation
        • S(c);
  • Actual
    • R(C);
    • Threat
      • R(C)
    • Vars
      • S(c);N_GUARD::P=Q
      • S(c);SBLOCK::P=S
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Developed and maintained by Brian Stephenson.
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