MESON Chess Problem Database

Problem Display
PID: 174098 (1K1n4/2Q5/N1pn3r/1p1r1p2/1Npk4/4R3/b2p4/b2q2B1 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

6th HM., Berlingozzo-Coutinho Festival, 1985

1K1n4/2Q5/N1pn3r/1p1r1p2/1Npk4/4R3/b2p4/b2q2B1

#2

6 + 13

1077 Boletim da UBP 1986

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qe2
      • 2.Sc2#
    • 1...Qf3
      • 2.Sc2#
    • 1...Qg4
      • 2.Sc2#
    • 1...Qh5
      • 2.Sc2#
    • 1...Qe1
      • 2.Sc2#
    • 1...Qf1
      • 2.Sc2#
    • 1...Qxg1
      • 2.Sc2#
    • 1...Bc3
      • 2.Re1#
    • 1...Se4
      • 2.Rd3#
    • 1...S6b7
      • 2.Qf4#
    • 1...S6f7
      • 2.Qf4#
    • 1...Sc8
      • 2.Qf4#
    • 1...Se8
      • 2.Qf4#
    • 1...Se6
      • 2.Sxc6#
    • 1...S8b7
      • 2.Sxc6#
    • 1...S8f7
      • 2.Sxc6#
  • Tries
    • 1.Qb6+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...c5!
    • 1.Qa7+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...c5!
    • 1.Qe7?
      • threat
        • 2.Rd3#
      • 1...Qxg1
        • 2.Sc2#
      • 1...c3
        • 2.Re4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Se6
        • 2.Sxc6#
      • 1...Re6!
    • 1.Qg7+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Rf6!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qxd5#
      • 1...Sxc6+
        • 2.Sxc6#
      • 1...Qxg1
        • 2.Sc2#
      • 1...Qf3
        • 2.Sc2#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Re5
        • 2.Rd3#
      • 1...c3
        • 2.Re1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 15
  • Sets
    • Q(b);N_GUARD::S(C),XQ(b)
    • Q(b);N_GUARD::S(C)
    • Q(b);N_GUARD,XB(A)::S(C)
    • B(a);SBLOCK::B(A)+R(B)
    • S(k);SBLOCK::B(A)+R(B),DCHECK
    • S(k);OGATE::QAR2(E)
    • S(m);N_GUARD::S(C),XP(j)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(E),XR(h)
      • Refutation
        • P(j);P_SPINP(j)
    • Try
      • Q(E);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(E),XR(h)
      • Refutation
        • P(j);P_SPINP(j)
    • Try
      • Q(E);
      • Threat
        • B(A)+R(B),DCHECK
      • Vars
        • Q(b);N_GUARD,XB(A)::S(C)
        • P(e);SBLOCK::B(A)+R(B),DCHECK
        • R(h);N_GUARD::QAB1(E),XR(h)
        • S(m);N_GUARD::S(C),XP(j)
      • Refutation
        • R(l);
    • Try
      • Q(E);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(E),XR(h)
      • Refutation
        • R(l);P_SPINR(l)
  • Actual
    • Q(E);XP(j)
    • Threat
      • QAR1(E),XR(h)
    • Vars
      • S(m);CHECK,XQ(E)::S(C),XS(m)
      • Q(b);N_GUARD,XB(A)::S(C)
      • Q(b);N_GUARD::S(C)
      • R(h);N_GUARD::QAB1(E),XR(h)
      • R(h);SBLOCK::B(A)+R(B),DCHECK
      • P(e);::B(A)+R(B)
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