MESON Chess Problem Database

Problem Display
PID: 156659 (4Bn1b/rb1p4/4p2R/Pp1kNN2/3P4/1P4Bp/4Q2K/4n3 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2007

4Bn1b/rb1p4/4p2R/Pp1kNN2/3P4/1P4Bp/4Q2K/4n3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qf3#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sf3+
      • 2.Qxf3#
  • Tries
    • 1.Sxd7?
      • threat
        • 2.Sb6#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Kc6
        • 2.Se7#
        • 2.Qe4#
      • 1...Bxd4
        • 2.Se7#
      • 1...Sxd7
        • 2.Qxe6#
      • 1...exf5
        • 2.Rd6#
      • 1...Ra6!
    • 1.Rh4?
      • threat
        • 2.Qxb5#
        • 2.Qe4#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Rxa5
        • 2.Qe4#
      • 1...Ba6
        • 2.Qe4#
      • 1...Bc6
        • 2.Qe4#
      • 1...Sd3
        • 2.Qf3#
        • 2.Qe4#
      • 1...b4
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qe4#
      • 1...exf5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb4#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Kc6
        • 2.Sb4#
        • 2.Se7#
        • 2.Qe4#
      • 1...Bxd4
        • 2.Se7#
      • 1...Sxd3
        • 2.Qf3#
      • 1...exf5
        • 2.Rd6#
      • 1...Sc2
        • 2.Qf3#
      • 1...b4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(A)
    • S(a);CHECK,N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • S(G);XP(h)
      • Threat
        • S(G)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(A),XS(a)
        • B(j);SBLOCK,XP(E)::S(H)
        • S(i);N_GUARD,XS(G)::QAB1(A),XP(e)
        • P(e);OGATE,XS(H)::R1(I)
      • Refutation
        • R(f);
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(A),XS(a)
        • R(f);XP(F)::QAB1(A)
        • B(g);::QAB1(A)
      • Refutation
        • P(e);XS(H)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • S(a);CHECK,N_GUARD::QAB(A),XS(a)
      • B(j);SBLOCK,XP(E)::S(H)
      • S(a);N_GUARD,XS(G)::QAB(A)
      • P(e);OGATE,XS(H)::R1(I)
      • S(a);N_GUARD::QAB(A)
      • P(c);::S(G),XP(c)
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