MESON Chess Problem Database

Problem Display
PID: 6379 (Q5br/p1p2NR1/r2pNBB1/1p6/1n3Pk1/pK3R2/8/6n1 w - - 0 1)

Lebedev, Aleksandr N

Comm., Bristol Times and Mirror, 1929

Q5br/p1p2NR1/r2pNBB1/1p6/1n3Pk1/pK3R2/8/6n1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh6
      • 2.Sxh6#
    • 1...Bh7
      • 2.Sh6#
    • 1...d5
      • 2.Se5#
  • Tries
    • 1.Bf5+?
      • 1...Kh5
        • 2.Bg4#
      • 1...Kxf5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qc8#
      • 1...Bxf7+
        • 2.Bxf7#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Rh5
        • 2.Bf5#
      • 1...Bh7
        • 2.Sh6#
      • 1...d5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(k);N_GUARD::S(G),XR(k)
    • B(j);S_CUTR(k)::S(G)
    • P(g);N_GUARD::S(G)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(d);S_FLIGHT::B(F)
      • Refutation
        • K(d);S_FLIGHT,XB(F)
  • Actual
    • S(D);P_SPINS(G)
    • Threat
      • QAB(I)
    • Vars
      • B(j);CHECK,OGATE,XS(G)::R(H)+B(F),XB(j)
      • S(a);OGATE,XR(B)::QAB1(I),XS(a)
      • R(k);SBLOCK::R(H)+B(F),DCHECK
      • B(j);N_PINS(G)::S(G)
      • P(g);N_PINS(G)::S(G)
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