MESON Chess Problem Database

Problem Display
PID: 215299 (3nr3/R5P1/2q2kB1/2B1NP1p/r1b2n2/4Qp2/3N3K/6R1 w - - 0 1)

Ulanov, Lev

Zadachi i Etyudi, 1999

3nr3/R5P1/2q2kB1/2B1NP1p/r1b2n2/4Qp2/3N3K/6R1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.g8S#
    • 1...Rh8
      • 2.gxh8Q#
      • 2.gxh8B#
    • 1...Se6
      • 2.Rf7#
  • Tries
    • 1.Se4+?
      • 1...Kxe5
        • 2.Qd4#
      • 1...Qxe4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Sd7#
      • 1...Rxe5
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Sxg6
        • 2.Qg5#
      • 1...Qd7
        • 2.Sxd7#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Qe6
        • 2.Se4#
      • 1...Re6
        • 2.g8S#
      • 1...Be6
        • 2.Sec4#
      • 1...Sfe6
        • 2.Sg4#
      • 1...Sde6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(i);N_GUARD,S_CUTB(c)::P=S
    • R(i);OGATE::PXR(i)=Q
    • S(h);N_GUARD,S_CUTB(c)::R1(I)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(g);S_FLIGHT,XS(F)::QAB1(D)
      • Refutation
        • Q(f);XS(B)
  • Actual
    • B(E);
    • Threat
      • B(E)+S(F),DCHECK
    • Vars
      • S(d);OGATE,XB(H)::QAB1(D)
      • Q(f);::B(E)+S(F),DCHECK,XQ(f)
      • Q(f);N_GUARD::S(B),XQ(f)
      • Q(f);N_GUARD::S(B)
      • R(i);N_GUARD,S_CUTB(c)::P=S
      • B(c);S_CUTR(i)::B(E)+S(F)
      • S(d);::B(E)+S(F),DCHECK
      • S(h);N_GUARD,S_CUTB(c)::R1(I)
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