MESON Chess Problem Database

Problem Display
PID: 272043 (N5K1/1p1p4/1rkr2n1/1bnp1N2/p1p1p3/B1Q1p3/3q4/8 w - - 0 1)

Lyubashevsky, Leonid Abramovic

Shinkarenko, Gennady Viktorovich

Shakhmatnaya kompozitsiya, 1998

N5K1/1p1p4/1rkr2n1/1bnp1N2/p1p1p3/B1Q1p3/3q4/8

#2

5 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd4#
    • 1...Qe1
      • 2.Sd4#
    • 1...Qa2
      • 2.Sd4#
    • 1...Qb2
      • 2.Sd4#
    • 1...Qc2
      • 2.Sd4#
    • 1...Qe2
      • 2.Sd4#
    • 1...Qf2
      • 2.Sd4#
    • 1...Qg2
      • 2.Sd4#
    • 1...Qh2
      • 2.Sd4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Sd3
      • 2.Sd4#
    • 1...Sf4
      • 2.Se7#
    • 1...Sh4
      • 2.Se7#
    • 1...Se5
      • 2.Se7#
    • 1...Se7+
      • 2.Sxe7#
    • 1...Sf8
      • 2.Se7#
    • 1...Sh8
      • 2.Se7#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qxc5#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Qxd4
        • 2.Sxd4#
      • 1...Sb3
        • 2.Qxb6#
      • 1...Sd3
        • 2.Qxb6#
      • 1...Sa6
        • 2.Qxb6#
      • 1...Se6
        • 2.Qxb6#
      • 1...Qb4!
    • 1.Qa5?
      • threat
        • 2.Qxb6#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Qxa5
        • 2.Sd4#
      • 1...Ra6
        • 2.Qc7#
      • 1...d4!
    • 1.Qe5?
      • threat
        • 2.Qxd6#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Sxe5
        • 2.Se7#
      • 1...Qh2
        • 2.Sd4#
      • 1...Re6
        • 2.Qc7#
      • 1...Rf6
        • 2.Qc7#
      • 1...Ba6!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxc5#
      • 1...Se7+
        • 2.Sxe7#
      • 1...Qxb4
        • 2.Sd4#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Sb3
        • 2.Qxd6#
      • 1...Sd3
        • 2.Sd4#
        • 2.Qxd6#
      • 1...Sa6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 15
  • Sets
    • Q(a);N_GUARD::S(C)
    • Q(a);N_GUARD::S(C),XQ(a)
    • S(g);P_SPINP(d),S_CUTQ(a)::S(C)
    • S(l);N_GUARD::S(C)
    • S(l);CHECK,N_GUARD::S(C),XS(l)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XS(g)
      • Vars
        • S(l);CHECK,N_GUARD::S(C),XS(l)
        • Q(a);XQ(B)::S(C),XQ(a)
        • S(g);OGATE::QAR1(B),XR(i)
      • Refutation
        • Q(a);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XR(i)
      • Vars
        • S(l);CHECK,N_GUARD::S(C),XS(l)
        • Q(a);N_GUARD,XQ(B)::S(C)
        • R(i);OGATE::QAR1(B)
      • Refutation
        • P(h);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XR(k)
      • Vars
        • S(l);CHECK,N_GUARD::S(C),XS(l)
        • S(l);N_GUARD,XQ(B)::S(C)
        • Q(a);N_GUARD::S(C)
        • R(k);OGATE::QAR1(B)
      • Refutation
        • B(f);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XS(g)
    • Vars
      • S(l);CHECK,N_GUARD::S(C),XS(l)
      • Q(a);N_GUARD,XQ(B)::S(C)
      • Q(a);N_GUARD::S(C),XQ(a)
      • S(g);OGATE::QAR1(B),XR(k)
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