MESON Chess Problem Database

Problem Display
PID: 109879 (3N3K/P2b4/p1n2Q2/1n1k4/R7/3P2p1/N2p1B1B/8 w - - 0 1)

Brabec, Juraj

Lehen, Ludovit

1st Prize, Sachove umeni (Ceskoslovensky sach), 1983

3N3K/P2b4/p1n2Q2/1n1k4/R7/3P2p1/N2p1B1B/8

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Qxe6#
    • 1...Be8
      • 2.Qe6#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sd6
      • 2.Sc3#
    • 1...Sbxa7
      • 2.Sc3#
    • 1...Sc7
      • 2.Sc3#
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sa5
      • 2.Sb4#
    • 1...Se5
      • 2.Sb4#
    • 1...Scxa7
      • 2.Sb4#
    • 1...Se7
      • 2.Sb4#
    • 1...Sb8
      • 2.Sb4#
    • 1...Sxd8
      • 2.Sb4#
    • 1...g2
      • 2.Qf3#
  • Tries
    • 1.Ra5?
      • threat
        • 2.Sc3#
      • 1...Sxa5
        • 2.Sb4#
      • 1...gxf2
        • 2.Qd6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...d1S!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Bfxg3#
        • 2.Bhxg3#
      • 1...Kd6!
    • 1.Qf7+?
      • 1...Ke5
        • 2.Bfxg3#
        • 2.Bhxg3#
      • 1...Be6
        • 2.Qxe6#
      • 1...Kd6!
    • 1.a8Q?
      • threat
        • 2.Sb4#
      • 1...gxf2
        • 2.Qe5#
      • 1...Be6
        • 2.Qxc6#
        • 2.Qxe6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...a5!
    • 1.a8B?
      • threat
        • 2.Sb4#
      • 1...gxf2
        • 2.Qe5#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...a5!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rc5#
      • 1...gxf2
        • 2.Qf3#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sbd4
        • 2.Sc3#
      • 1...Scd4
        • 2.Sb4#

One of the white bishops is obtrusive.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • B(g);N_GUARD::QAB1(F),XB(g)
    • B(g);N_GUARD::QAB1(F)
    • S(c);N_GUARD::S(A)
    • S(c);N_GUARD::S(A),XS(c)
    • S(c);N_GUARD,XP(G)::S(A)
    • S(f);N_GUARD::S(A),XS(f)
    • S(f);N_GUARD::S(A)
    • S(f);N_GUARD,XP(G)::S(A)
    • S(f);N_GUARD,XS(H)::S(A)
    • P(b);::QAB(F)
  • Tries
    • Try
      • R(E);P_PINS(c)
      • Threat
        • S(A)
      • Vars
        • S(f);N_GUARD,N_SPINS(c),XR(E)::S(A)
        • P(b);XB(B)::QAR1(F)
        • B(g);N_GUARD::QAB1(F),XB(g)
        • S(f);N_GUARD::QAR1(F),XS(f)
      • Refutation
        • P(a);
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(F);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(F),XB(g)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b)
    • Try
      • P(G);P_PINS(f)
      • Threat
        • S(A)
      • Vars
        • P(b);XB(B)::QAR1(F)
        • S(c);N_GUARD::QAR1(F),XS(c)
      • Refutation
        • P(e);
    • Try
      • P(G);P_PINS(f)
      • Threat
        • S(A)
      • Vars
        • P(b);XB(B)::QAR1(F)
        • B(g);N_GUARD::QAB1(F),XB(g)
        • S(c);N_GUARD::QAR1(F),XS(c)
      • Refutation
        • P(e);
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • P(b);XB(B)::QAB(F)
      • B(g);N_GUARD::QAB1(F),XB(g)
      • S(c);N_GUARD::S(A)
      • S(f);N_GUARD::S(A)
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