MESON Chess Problem Database

Problem Display
PID: 64736 (1N1RRKB1/8/1ppB4/1bP2p2/n2k1P1p/2b2P2/4P2q/Q4n2 w - - 0 1)

Lukyanov, Valentin Volodimirovich

2nd Prize, Ukraine Ty., 1980

1N1RRKB1/8/1ppB4/1bP2p2/n2k1P1p/2b2P2/4P2q/Q4n2

#2

11 + 10

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Sxc6#
    • 1...Bc4
      • 2.Sxc6#
    • 1...Ba6
      • 2.Sxc6#
    • 1...bxc5
      • 2.Bc7#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Be7#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Sxc5
        • 2.Be5#
      • 1...Bd2
        • 2.Bc7#
      • 1...Bc4
        • 2.Sxc6#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd2!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Bc7#
      • 1...Qxf4
        • 2.Bxf4#
      • 1...Sxc5
        • 2.Bxc5#
      • 1...Bb4
        • 2.Be7#
      • 1...Bc4
        • 2.Sxc6#
      • 1...Se3
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(g);N_GUARD::S(G),XP(j)
    • P(i);SBLOCK,XP(E)::R(H)+B(F)
  • Tries
    • Try
      • Q(A);N_PINB(c)
      • Threat
        • R(H)+B(F)
      • Vars
        • Q(b);OGATE,XP(D)::QAR2(A),XQ(b)
        • S(d);SBLOCK,XP(E)::R(H)+B(F),DCHECK
        • B(c);::R(H)+B(F)
        • B(g);N_GUARD::S(G),XP(j)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(A);N_PINB(c)
    • Threat
      • R(H)+B(F)
    • Vars
      • Q(b);OGATE,XP(D)::R(H)+B(F),XQ(b)
      • S(d);OGATE,XP(E)::R(H)+B(F),DCHECK,XS(d)
      • B(c);::R(H)+B(F)
      • B(g);N_GUARD::S(G),XP(j)
      • S(a);SBLOCK::R(H)+B(F),DCHECK
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).