MESON Chess Problem Database

Problem Display
PID: 8172 (2N2N1b/1p3p1P/2n2kpB/2R5/3PP1p1/4KnP1/1R6/Q7 w - - 0 1)

Lyubashevsky, Leonid Abramovic

Melnichenko, Viktor Oleksandrovich

The Problemist, 1995

2N2N1b/1p3p1P/2n2kpB/2R5/3PP1p1/4KnP1/1R6/Q7

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sfxd4
      • 2.Rf2#
    • 1...Scxd4
      • 2.Rb6#
    • 1...g5
      • 2.Rf5#
    • 1...b5
      • 2.Rxc6#
    • 1...b6
      • 2.Rxc6#
  • Tries
    • 1.Rb6?
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Se1
        • 2.d5#
      • 1...Sg1
        • 2.d5#
      • 1...Sd2
        • 2.d5#
      • 1...Sh2
        • 2.d5#
      • 1...Sh4
        • 2.d5#
      • 1...Se5
        • 2.dxe5#
      • 1...Sg5
        • 2.d5#
      • 1...g5
        • 2.Rf5#
      • 1...Bg7!
    • 1.d5?
      • threat
        • 2.Sd7#
      • 1...Ke5
        • 2.Sd7#
      • 1...Sfe5
        • 2.Rf2#
      • 1...Sce5
        • 2.Rb6#
      • 1...Sb8
        • 2.Rf2#
        • 2.Rb6#
      • 1...g5!
  • Keys
    • 1.Rf2!
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Bg7
        • 2.Bg5#
      • 1...Sb4
        • 2.d5#
      • 1...Sa5
        • 2.d5#
      • 1...Se5
        • 2.dxe5#
      • 1...Sa7
        • 2.d5#
      • 1...Se7
        • 2.d5#
      • 1...Sb8
        • 2.d5#
      • 1...Sd8
        • 2.d5#
      • 1...g5
        • 2.Rf5#
      • 1...b5
        • 2.Rxc6#
      • 1...b6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATEB,XP(E)::R(B)
    • S(c);OGATEB,XP(E)::R(B)
    • P(e);N_GUARD::R1(G)
    • P(f);N_GUARD::R(G),XS(c)
  • Tries
    • Try
      • R(B);P_PINS(c)
      • Vars
        • S(a);N_SPINS(c),OGATE,P_SPINS(a),XP(E)::QAB(A),XS(a)
        • S(a);N_GUARD::QAB(A)+P(E)
        • S(a);OGATE::P(E),XS(a)
        • P(e);N_GUARD::R1(G)
      • Refutation
        • B(h);
    • Try
      • P(E);
      • Threat
        • S(K)
      • Vars
        • K(d);S_FLIGHT::S(K)
        • S(a);S_CUTS(c),S_CUTS(c)::R(B)
        • S(c);S_CUTS(a),S_CUTS(a)::R(B)
      • Refutation
        • P(e);
  • Actual
    • R(B);P_PINS(a)
    • Vars
      • S(c);OGATE,XP(E)::QAB(A),XS(c)
      • B(h);SBLOCK::B(H)
      • S(c);N_GUARD::QAB(A)+P(E)
      • S(c);OGATE::P(E),XS(c)
      • P(e);N_GUARD::R1(G)
      • P(f);N_GUARD::R(G),XS(c)
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