MESON Chess Problem Database

Problem Display
PID: 66169 (1b5Q/2ppp1rr/pP2P1p1/P1Pk1NR1/1K4N1/5P2/8/1B6 w - - 0 1)

Lacny, Ludovit

3rd Prize, Problem (Zagreb), 1957-1958

1b5Q/2ppp1rr/pP2P1p1/P1Pk1NR1/1K4N1/5P2/8/1B6

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Sd4#
    • 1...c6
      • 2.Ba2#
    • 1...dxe6
      • 2.Be4#
  • Tries
    • 1.Sd6+?
      • 1...Kc6
        • 2.Be4#
      • 1...Kxe6
        • 2.Ba2#
        • 2.Re5#
      • 1...Kd4!
    • 1.Sxe7+?
      • 1...Kd4
        • 2.Rd5#
      • 1...Kxe6!
    • 1.Qe8?
      • threat
        • 2.Qxd7#
      • 1...Kc6
        • 2.Be4#
      • 1...Kxe6
        • 2.Sd4#
      • 1...dxe6
        • 2.Ba2#
        • 2.Be4#
        • 2.Qd7#
      • 1...c6
        • 2.Ba2#
      • 1...d6
        • 2.Ba2#
      • 1...cxb6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxd7#
      • 1...Kc6
        • 2.Sd4#
      • 1...Kxe6
        • 2.Ba2#
      • 1...cxb6
        • 2.Ba2#
      • 1...dxe6
        • 2.Be4#
        • 2.Qd7#
      • 1...c6
        • 2.Ba2#
      • 1...d6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(g);::R(H)+S(G)
    • P(d);SBLOCK::B(A)
    • P(e);SBLOCK,XP(J)::B(A)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(g)
    • Try
      • S(G);CHECK,XP(f)
      • Vars
        • K(a);P-FLIGHT,P_SPINR(g)::R1(H)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • Q(K);
      • Threat
        • QAR2(K),XP(e)
      • Vars
        • K(a);P_SPINP(e),S_FLIGHT::B(A)
        • K(a);P_SPINP(f),S_FLIGHT,XP(J)::S(G)
        • P(d);SBLOCK::B(A)
        • P(e);::B(A)
      • Refutation
        • P(d);XP(I)
  • Actual
    • Q(K);
    • Threat
      • QAR2(K),XP(e)
    • Vars
      • K(a);P_SPINP(d),S_FLIGHT::S(G)
      • K(a);P_SPINP(e),S_FLIGHT,XP(J)::B(A)
      • P(d);XP(I)::B(A)
      • P(d);::B(A)
      • P(e);::B(A)
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