MESON Chess Problem Database

Problem Display
PID: 69777 (1b6/4N1R1/1Q2pp1n/3B1p2/4pkPB/1pR1p3/b3K3/2N5 w - - 0 1)

Lacny, Ludovit

4th HM., Phenix, 1989

1b6/4N1R1/1Q2pp1n/3B1p2/4pkPB/1pR1p3/b3K3/2N5

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe3#
    • 1...Sxg4
      • 2.Sg6#
    • 1...exd5
      • 2.Qxb8#
    • 1...e5
      • 2.Qxe3#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Qxb8#
      • 1...Ke5
        • 2.Sg6#
      • 1...Sxg4
        • 2.Sg6#
      • 1...Be5
        • 2.Sd5#
        • 2.Qxe3#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Ba7
        • 2.Qc7#
        • 2.Qd6#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Sf7!
    • 1.Rc4?
      • threat
        • 2.Sd3#
      • 1...Ke5
        • 2.Qxb8#
      • 1...Bb1!
    • 1.Rg5?
      • threat
        • 2.Sg6#
      • 1...Ke5
        • 2.Bg3#
      • 1...fxg5!
  • Keys
    • 1.Rxe3!
      • threat
        • 2.Bg3#
      • 1...Ke5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(j);SBLOCK::QAB1(G),XP(c)
    • S(i);SBLOCK,XP(D)::S(H)
    • P(g);N_GUARD,XB(F)::QAB(G),XB(j)
    • P(g);SBLOCK::QAB1(G),XP(c)
  • Tries
    • Try
      • B(F);XP(g)
      • Threat
        • QAB(G),XB(j)
      • Vars
        • K(e);S_FLIGHT::S(H)
        • S(i);SBLOCK,XP(D)::S(H)
        • B(j);N_GUARD::QAB(G),XB(j)
      • Refutation
        • S(i);
    • Try
      • R(C);P_PINP(d)
      • Threat
        • S(A)
      • Vars
        • K(e);N_SPINP(d),S_FLIGHT::QAB(G),XB(j)
      • Refutation
        • B(a);
    • Try
      • R(I);
      • Threat
        • S(H)
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT::B(E)
      • Refutation
        • P(h);XR(I)
  • Actual
    • R(C);XP(c)
    • Threat
      • B(E)
    • Vars
      • K(e);P_SPINP(d),S_FLIGHT::S(A)
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