MESON Chess Problem Database

Problem Display
PID: 7479 (8/3Rp3/Kp6/1Pkppn2/nRp5/1B2N3/1p1Q3b/4N2b w - - 0 1)

Lacny, Ludovit

1/2 Prize, Pravda, 1990-1991

8/3Rp3/Kp6/1Pkppn2/nRp5/1B2N3/1p1Q3b/4N2b

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rc7#
    • 1...cxb3
      • 2.Sd3#
    • 1...c3
      • 2.Sd3#
    • 1...d4
      • 2.Rxc4#
    • 1...e4
      • 2.Rxd5#
  • Tries
    • 1.Sd3+?
      • 1...Kd4
        • 2.Rxc4#
      • 1...cxd3!
    • 1.Sxc4?
      • threat
        • 2.Rc7#
      • 1...dxc4
        • 2.Rxc4#
      • 1...Sd4
        • 2.Sd3#
      • 1...d4
        • 2.Sd3#
      • 1...e4
        • 2.Rxd5#
      • 1...Sc3!
    • 1.Sxf5?
      • threat
        • 2.Rc7#
      • 1...c3
        • 2.Sd3#
      • 1...d4
        • 2.Rxc4#
      • 1...e4
        • 2.Rxd5#
      • 1...Sc3!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Rxc4#
      • 1...Bxd5
        • 2.Rxd5#
      • 1...cxb3
        • 2.Sd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd6
        • 2.Rc7#
      • 1...c3
        • 2.Sd3#
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(i);SBLOCK::R(H)
    • P(e);N_GUARD,XB(C)::S(A)
    • P(e);N_GUARD::S(A)
    • P(g);N_GUARD::R1(E),XP(e)
    • P(h);S_CUTB(a)::R1(H),XP(g)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(f);P_SPINP(e),S_FLIGHT::R1(E),XP(e)
      • Refutation
        • P(e);XS(A)
    • Try
      • S(D);XP(e)
      • Threat
        • R(H)
      • Vars
        • P(g);OGATE,XS(D)::R1(E),XP(g)
        • S(i);SBLOCK::S(A)
        • P(g);::S(A)
        • P(h);S_CUTB(a)::R1(H),XP(g)
      • Refutation
        • S(d);
    • Try
      • S(D);XS(i)
      • Threat
        • R(H)
      • Vars
        • P(e);N_GUARD::S(A)
        • P(g);N_GUARD::R1(E),XP(e)
        • P(h);S_CUTB(a)::R1(H),XP(g)
      • Refutation
        • S(d);
  • Actual
    • S(D);XP(g)
    • Threat
      • R1(E),XP(e)
    • Vars
      • B(a);OGATE,XS(D)::R1(H),XB(a)
      • P(e);N_GUARD,XB(C)::S(A)
      • S(i);N_GUARD::QAB(B),XS(i)
      • S(i);SBLOCK::R(H)
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