MESON Chess Problem Database

Problem Display
PID: 64463 (Bn6/8/2P1N3/1Q1P1P1R/3Pk3/Rp6/3P2nN/BK6 w - - 0 1)

Lider, Valentin Viktorovich

2nd Prize, Freie Presse, 1980

Bn6/8/2P1N3/1Q1P1P1R/3Pk3/Rp6/3P2nN/BK6

#2

13 + 4

3752 FIDE Album (1980-1982) 1988
56 The Problemist 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.d3#
  • Tries
    • 1.Sc5+?
      • 1...Kf4
        • 2.Qxb8#
      • 1...Kxd5!
    • 1.c7?
      • 1...Se1
        • 2.Qe2#
      • 1...Se3
        • 2.d3#
      • 1...Sf4
        • 2.Sc5#
      • 1...Sh4
        • 2.Qe2#
      • 1...Sa6
        • 2.d6#
      • 1...Sd7
        • 2.d6#
      • 1...b2
        • 2.Qd3#
      • 1...Sc6!
  • Keys
    • 1.d6!
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Se1
        • 2.Rh4#
      • 1...Se3
        • 2.d3#
      • 1...Sf4
        • 2.Sg5#
      • 1...Sh4
        • 2.Rxh4#
      • 1...Sa6
        • 2.c7#
      • 1...Sd7
        • 2.cxd7#
        • 2.c7#
      • 1...b2
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::P(C)
  • Tries
    • Try
      • S(L);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(G),XS(d)
      • Refutation
        • K(c);S_FLIGHT,XP(H)
    • Try
      • P(K);
      • Vars
        • S(a);N_GUARD::QAR2(G)
        • S(a);SBLOCK::P(C)
        • S(a);SBLOCK::S(L)
        • S(d);N_GUARD::B(M)+P(H)
        • P(b);::QAB1(G)
      • Refutation
        • S(d);
  • Actual
    • P(H);
    • Vars
      • S(d);OGATE,P_SPINS(d),XP(K)::B(M),XS(d)
      • S(a);N_GUARD::R(J)
      • S(a);SBLOCK::P(C)
      • S(a);SBLOCK::S(L)
      • S(a);N_GUARD::R(J),XS(a)
      • S(d);N_GUARD::B(M)+P(K)
      • P(b);::QAR1(G)
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