MESON Chess Problem Database

Problem Display
PID: 261143 (Q7/2N1p3/1R2Pnp1/4kNB1/1P2P3/2nBR3/2p3K1/8 w - - 0 1)

Lobusov, Andrey Jakovlevic

Melnikov, Volodimir Grigorovich

3rd Prize, Neue Zurcher Zeitung, 1988

Q7/2N1p3/1R2Pnp1/4kNB1/1P2P3/2nBR3/2p3K1/8

#2

11 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Rb5+?
      • 1...Scd5
        • 2.Qa1#
      • 1...Sfd5
        • 2.Qh8#
      • 1...Sxb5!
    • 1.Qh8?
      • threat
        • 2.Qh2#
      • 1...Sxe4
        • 2.Rb5#
      • 1...Se2
        • 2.Rb5#
      • 1...Sd5
        • 2.exd5#
      • 1...gxf5!
  • Keys
    • 1.Sh4!
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Sf3#
      • 1...Scxe4
        • 2.Qa1#
      • 1...Sfxe4
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • S(b);P_SPINS(b),S_CUTS(d)::QAB(K)
        • S(d);P_SPINS(d),S_CUTS(b),S_CUTS(b)::QAB(K)
      • Refutation
        • S(b);XR(H)
    • Try
      • Q(K);P_PINS(d)
      • Threat
        • QAB(K)
      • Vars
        • S(b);N_GUARD,N_SPINS(d),P_SPINS(b),XP(E)::R(H)
        • S(b);N_GUARD::R(H)
        • S(b);OGATE::R(C)+P(E),XS(b)
      • Refutation
        • P(e);XS(F)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(c);S_FLIGHT::S(F)
      • S(b);OGATEB,P_SPINS(b),XP(E)::QAB(K)
      • S(d);OGATEB,P_SPINS(d),XP(E)::QAB(K)
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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).