MESON Chess Problem Database

Problem Display
PID: 159673 (n2R1N2/8/p6R/p1k1P3/8/K2B1b2/6Qp/n5bq w - - 0 1)

Vovnejko, Viktor Ivanovich

Shakhmatna misl, 1983

n2R1N2/8/p6R/p1k1P3/8/K2B1b2/6Qp/n5bq

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qxf2#
    • 1...Bd1
      • 2.Rc6#
      • 2.Rd5#
    • 1...Be2
      • 2.Rc6#
      • 2.Rd5#
    • 1...Bg4
      • 2.Rc6#
      • 2.Rd5#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Bh5
      • 2.Rc6#
      • 2.Rd5#
    • 1...Bc6
      • 2.Rxc6#
    • 1...Sc2+
      • 2.Qxc2#
    • 1...Sb3
      • 2.Qc2#
  • Tries
    • 1.Sd7+?
      • 1...Kd5
        • 2.Rd6#
      • 1...Kd4!
    • 1.Rhd6?
      • threat
        • 2.Se6#
        • 2.Sd7#
      • 1...Sc2+
        • 2.Qxc2#
      • 1...Bc6
        • 2.Rxc6#
      • 1...Bg4
        • 2.Rc6#
      • 1...Sb6
        • 2.Se6#
      • 1...Sc7
        • 2.Sd7#
      • 1...Bd5!
    • 1.Rdd6?
      • threat
        • 2.Se6#
        • 2.Sd7#
      • 1...Sc2+
        • 2.Qxc2#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Bg4
        • 2.Rd5#
      • 1...Sb6
        • 2.Se6#
      • 1...Sc7
        • 2.Sd7#
      • 1...Bc6!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qc3#
      • 1...Sc2+
        • 2.Qxc2#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bd5
        • 2.Sd7#
      • 1...Bc6
        • 2.Se6#
      • 1...Sb6
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAB(A),XB(b)
    • B(e);N_GUARD::R1(F),XB(e)
    • B(e);N_GUARD::R1(E),XB(e)
    • S(a);CHECK,N_GUARD::QAR(A),XS(a)
    • S(a);N_GUARD::QAR(A)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINB(e)::R1(E)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAR(A),XS(a)
        • B(e);N_GUARD::R1(E),XB(e)
        • B(e);N_GUARD::R1(E)
        • S(i);::S(G)
      • Refutation
        • B(e);
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAR(A),XS(a)
        • B(e);N_GUARD::R1(F),XB(e)
        • B(e);N_GUARD::R1(F)
        • S(i);::S(G)
      • Refutation
        • B(e);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • S(a);CHECK,N_GUARD::QAR(A),XS(a)
      • B(b);N_GUARD::QAB1(A),XB(b)
      • B(e);SBLOCK::S(G)
      • S(i);N_GUARD::QAB1(A),XS(i)
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