MESON Chess Problem Database

Problem Display
PID: 47849 (1B1Q4/bP2p3/4Bp2/1pnP4/2PkN2R/5p2/p3PP2/2Rb3K w - - 0 1)

Vasilenko, Anatoly Grigorovich

2/4 HM., Pilchenko-50 JT (Uralski Problemist), 2002

1B1Q4/bP2p3/4Bp2/1pnP4/2PkN2R/5p2/p3PP2/2Rb3K

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.e3#
    • 1...Sxe6
      • 2.dxe6#
    • 1...f5
      • 2.Qh8#
  • Tries
    • 1.Sd6+?
      • 1...Ke5
        • 2.Sf7#
      • 1...Se4!
    • 1.Qc7?
      • threat
        • 2.Sxc5#
      • 1...Sxe4
        • 2.Bxa7#
      • 1...Sxe6
        • 2.Rxd1#
      • 1...Sxb7
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sxf6#
        • 2.Rxd1#
      • 1...Sb3
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sxf6#
      • 1...Sd3
        • 2.e3#
      • 1...Sa4
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sxf6#
        • 2.Rxd1#
      • 1...Sa6
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sxf6#
        • 2.Rxd1#
      • 1...Sd7
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sxf6#
        • 2.Rxd1#
      • 1...f5
        • 2.Qe5#
      • 1...Bc2!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc3#
      • 1...Sxe4
        • 2.Qxa7#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...Sa4
        • 2.Qd2#
      • 1...b4
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(f);SBLOCK::P(C)
    • S(f);OGATE,XB(I)::QAR(L)+P(H),XS(f)
    • P(g);OGATEB::QAB(L)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);S_FLIGHT::B(K)+S(F),DCHECK
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(L);
      • Threat
        • R(G)+S(F),XS(f)
      • Vars
        • S(f);OGATEB,P_SPINS(f),XS(F)::B(K),XB(h)
        • S(f);N_GUARD,XB(I)::R(A),XB(a)
        • S(f);SBLOCK::P(C)
        • P(g);N_GUARD::QAB1(L)
      • Refutation
        • B(a);
  • Actual
    • Q(L);
    • Threat
      • QAB1(L)
    • Vars
      • S(f);OGATEB,P_SPINS(f),XS(F)::QAB(L),XB(h)
      • P(b);OGATE::QAB(L),XQ(b)
      • P(b);OGATE::QAB(L),XB(b)
      • S(f);N_GUARD::QAR2(L)
      • P(e);::R(G)+S(F),XS(f)
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