MESON Chess Problem Database

Problem Display
PID: 45159 (1K3b2/1N2p2q/1B1Q1p2/1n1P2p1/2b5/Rn1k1P1p/r1R5/3B4 w - - 0 1)

Lacny, Ludovit

4th Prize, Pravda, 1992-1993

1K3b2/1N2p2q/1B1Q1p2/1n1P2p1/2b5/Rn1k1P1p/r1R5/3B4

#2

9 + 11

3681 FIDE Album (1992-1994) 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb3+?
      • 1...Sc3
        • 2.Rbxc3#
      • 1...Bxb3!
    • 1.Qh2?
      • threat
        • 2.Qd2#
        • 2.Qe2#
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rxa3
        • 2.Qe2#
      • 1...Sxa3
        • 2.Qe2#
      • 1...Sd4
        • 2.Qd2#
      • 1...Qe4
        • 2.Qd2#
      • 1...Sc3!
    • 1.Qb4?
      • threat
        • 2.Qd2#
        • 2.Qxc4#
      • 1...Rxa3
        • 2.Qxc4#
      • 1...Bxd5
        • 2.Qd2#
      • 1...Sxa3
        • 2.Qc3#
      • 1...Sd4
        • 2.Qd2#
        • 2.Qc3#
      • 1...Qe4
        • 2.Qd2#
      • 1...Qh4
        • 2.Qd2#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd6
        • 2.Qd2#
        • 2.Qc3#
      • 1...Rxc2!
    • 1.Qf4?
      • threat
        • 2.Sc5#
        • 2.Qd2#
        • 2.Qe3#
        • 2.Qxc4#
      • 1...Rxc2
        • 2.Qe3#
      • 1...Rxa3
        • 2.Qe3#
        • 2.Qxc4#
      • 1...Bxd5
        • 2.Sc5#
        • 2.Qd2#
        • 2.Qe3#
      • 1...Sxa3
        • 2.Qe3#
      • 1...Qe4
        • 2.Qd2#
        • 2.Qxe4#
      • 1...Qh4
        • 2.Sc5#
        • 2.Qd2#
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Sd4
        • 2.Sc5#
        • 2.Qd2#
        • 2.Qxd4#
      • 1...Sd6
        • 2.Sc5#
        • 2.Qd2#
        • 2.Qe3#
        • 2.Qd4#
      • 1...e5
        • 2.Qd2#
        • 2.Qe3#
        • 2.Qxc4#
      • 1...e6
        • 2.Qd2#
        • 2.Qe3#
        • 2.Qxc4#
      • 1...gxf4!
    • 1.Qc5?
      • threat
        • 2.Qe3#
        • 2.Qxc4#
      • 1...Rxc2
        • 2.Qe3#
      • 1...Bxd5
        • 2.Be2#
        • 2.Qe3#
      • 1...Sxa3
        • 2.Qe3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qh4
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
        • 2.Qd4#
      • 1...Qe4!
    • 1.Qe5?
      • threat
        • 2.Sc5#
        • 2.Qe2#
        • 2.Qe3#
      • 1...Rxc2
        • 2.Qe3#
      • 1...Rxa3
        • 2.Qe2#
        • 2.Qe3#
      • 1...Sxa3
        • 2.Qc3#
        • 2.Qe2#
        • 2.Qe3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sc3
        • 2.Qxc3#
        • 2.Qe3#
      • 1...Sd4
        • 2.Sc5#
        • 2.Qxd4#
      • 1...e6
        • 2.Qe2#
        • 2.Qe3#
      • 1...fxe5!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qe2#
        • 2.Qe3#
      • 1...Rxc2
        • 2.Qe3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sc3
        • 2.Qe3#
      • 1...Sd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK,XS(b)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::R1(C),XS(f)
      • Refutation
        • B(e);XR(C)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);OGATE,XR(B)::QAB1(G),XR(a)
        • R(a);N_SPINS(b),XR(C)::QAB1(G)
        • S(f);N_SPINS(b),XR(C)::QAB1(G)
        • S(f);::QAR1(G)
        • Q(j);::QAR1(G)
      • Refutation
        • S(f);N_SPINS(b)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_SPINS(b),XR(C)::QAB1(G),XB(e)
        • B(e);XP(E)::QAR1(G)
        • S(f);N_GUARD,N_SPINS(b),XR(C)::QAR1(G)
        • Q(j);::QAR1(G)
        • S(f);N_GUARD,N_SPINS(b)::QAR1(G),XS(f)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Vars
        • R(a);XR(B)::QAR1(G)
        • S(f);N_SPINS(b),XR(C)::QAR1(G)
        • S(f);N_SPINS(b)::QAR1(G)
      • Refutation
        • P(g);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XR(B)::QAR1(G)
        • S(f);N_SPINS(b),XR(C)::QAR1(G)
        • S(f);N_GUARD::QAR1(G),XS(f)
        • Q(j);::QAR1(G)
        • S(f);N_SPINS(b)::QAR1(G)
      • Refutation
        • Q(j);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • R(a);XR(B)::QAR1(G)
        • Q(j);N_GUARD::QAB1(G),XQ(j)
      • Refutation
        • P(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);XR(B)::QAR1(G)
      • Q(j);N_GUARD::QAB1(G),XQ(j)
      • S(f);N_SPINS(b)::QAR1(G)
      • S(f);SBLOCK::S(H)
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