MESON Chess Problem Database

Problem Display
PID: 132438 (bb1Q4/6B1/1p1n4/1NPk2nr/K2N4/8/3P4/1BR5 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

2nd HM., StrateGems, 2008

bb1Q4/6B1/1p1n4/1NPk2nr/K2N4/8/3P4/1BR5

#2

9 + 7

145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Sc7#
      • 2.Qxd6#
    • 1...Bc7
      • 2.Sxc7#
    • 1...Se4
      • 2.Ba2#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Sc3#
      • 1...bxc5+
        • 2.Rxc5#
      • 1...Se4
        • 2.Ba2#
      • 1...Rh3!
    • 1.Qxg5+?
      • 1...Sf5
        • 2.Qg2#
      • 1...Rxg5!
    • 1.Qxb8?
      • threat
        • 2.Sc7#
        • 2.Qxd6#
      • 1...Sxb5
        • 2.Qe5#
        • 2.Qxa8#
      • 1...Rh6
        • 2.Sc7#
      • 1...Bc6
        • 2.Qxd6#
      • 1...Sge4
        • 2.Sc7#
      • 1...Se6
        • 2.Qxd6#
      • 1...Sgf7
        • 2.Sc7#
      • 1...Sde4
        • 2.Sc7#
        • 2.Ba2#
        • 2.Qe5#
        • 2.Qxa8#
      • 1...Sf5
        • 2.Sc7#
        • 2.Qe5#
        • 2.Qxa8#
      • 1...Sb7
        • 2.Sc7#
        • 2.Qe5#
      • 1...Sdf7
        • 2.Sc7#
        • 2.Qxa8#
      • 1...Sc8
        • 2.Sc7#
        • 2.Qe5#
        • 2.Qxa8#
      • 1...Se8
        • 2.Qe5#
        • 2.Qxa8#
      • 1...Sc4!
    • 1.d3?
      • threat
        • 2.Ba2#
      • 1...bxc5
        • 2.Sc3#
      • 1...Rh2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe5#
      • 1...Sxb5
        • 2.Ba2#
      • 1...Sf3
        • 2.Qe6#
      • 1...Sh3
        • 2.Qe6#
      • 1...Sge4
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sgf7
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sde4
        • 2.Ba2#
      • 1...Sf5
        • 2.Ba2#
      • 1...Sb7
        • 2.Ba2#
      • 1...Sdf7
        • 2.Ba2#
      • 1...Sc8
        • 2.Ba2#
      • 1...Se8
        • 2.Ba2#

This is a version of 80694

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::S(F),XB(g)
    • S(b);SBLOCK::B(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • S(F)
      • Vars
        • P(d);CHECK,OGATE,XP(G)::R1(B),XP(d)
        • S(b);SBLOCK::B(A)
      • Refutation
        • R(c);
    • Try
      • Q(I);CHECK,N_PINS(e),XS(b)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB(I)
      • Refutation
        • R(c);XQ(I)
    • Try
      • Q(I);N_PINS(e),XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::S(F)
        • B(f);P_PINS(F)::QAR1(I),XS(e)
        • S(b);::S(F)
        • S(b);::QAR1(I),XS(e)
      • Refutation
        • S(e);
    • Try
      • P(C);
      • Threat
        • B(A)
      • Vars
        • P(d);SBLOCK,XP(G)::S(F)
      • Refutation
        • R(c);
  • Actual
    • Q(I);N_PINS(e)
    • Threat
      • QAR1(I)
    • Vars
      • S(e);N_GUARD,XS(F)::B(A)
      • S(b);N_GUARD::QAB1(I)
      • S(b);N_GUARD::QAB1(I),XS(b)
      • S(e);SBLOCK::S(F)
      • S(e);N_GUARD::B(A)
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