MESON Chess Problem Database

Problem Display
PID: 15722 (2nR4/B2B3b/1P5r/K2N1pN1/1QPk1Pp1/1R6/8/4n3 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

1/2 Prize, Mansfield MT, 1987

2nR4/B2B3b/1P5r/K2N1pN1/1QPk1Pp1/1R6/8/4n3

#2

11 + 7

3297 FIDE Album (1986-1988) 1995
56 The Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.b7#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Sb5#
        • 2.c5#
      • 1...Rxb6
        • 2.Sb5#
        • 2.Sce6#
        • 2.Bxc8#
      • 1...Sxb6
        • 2.Sb5#
        • 2.Be6#
      • 1...Sxa7
        • 2.Be6#
        • 2.c5#
      • 1...Bg8
        • 2.Sb5#
      • 1...Sc2
        • 2.Sb5#
      • 1...Sd6
        • 2.b7#
      • 1...Sd3!
    • 1.Se6+?
      • 1...Ke4
        • 2.Re3#
        • 2.Qxe1#
      • 1...Rxe6!
    • 1.Bxf5?
      • threat
        • 2.c5#
      • 1...Rxb6
        • 2.Se6#
      • 1...Sxb6
        • 2.Sf6#
      • 1...Sc2
        • 2.Rd3#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Sd6
        • 2.b7#
      • 1...Rd6!
    • 1.Rxc8?
      • threat
        • 2.Qc3#
        • 2.Qc5#
      • 1...Rh3
        • 2.Qc5#
        • 2.b7#
      • 1...Sd3
        • 2.Qc3#
      • 1...Rc6!
  • Keys
    • 1.Se3!
      • threat
        • 2.c5#
      • 1...Rxb6
        • 2.Bxc8#
      • 1...Sxb6
        • 2.Be6#
      • 1...Sd3
        • 2.Sc2#
      • 1...Bg8
        • 2.Sxf5#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sd6
        • 2.b7#

There are these versions: 134232

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD,S_CUTR(e)::B(I)+P(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::S(F)
        • S(a);::S(F)
        • S(g);N_GUARD,S_CUTR(e)::B(I)+P(H)
      • Refutation
        • S(a);
    • Try
      • S(G);CHECK
      • Refutation
        • R(e);XS(G)
    • Try
      • B(J);XP(d)
      • Threat
        • QAR(B)+P(C)
      • Vars
        • R(e);N_GUARD,P_SPINR(e),XP(H)::S(G)
        • S(g);N_GUARD,P_SPINS(g),XP(H)::R(K)+S(F)
        • S(a);N_GUARD::R1(A)
        • S(a);N_GUARD::R1(A),XS(a)
        • S(g);N_GUARD,S_CUTR(e)::B(I)+P(H)
      • Refutation
        • R(e);
    • Try
      • R(K);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(B)
      • Refutation
        • R(e);
  • Actual
    • S(F);
    • Threat
      • QAR(B)+P(C)
    • Vars
      • R(e);N_GUARD,P_SPINR(e),XP(H)::R(K)+B(J),XS(g)
      • S(g);N_GUARD,P_SPINS(g),XP(H)::R(K)+B(J)
      • S(a);N_GUARD::S(F)
      • B(f);N_GUARD::S(F),XP(d)
      • S(a);N_GUARD::S(F),XS(a)
      • S(g);N_GUARD,S_CUTR(e)::B(I)+P(H)
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