MESON Chess Problem Database

Problem Display
PID: 193357 (4n2K/5p2/p7/k2p4/2PBP3/P2P1Q2/1PB3n1/4b3 w - - 0 1)

Kartsev, Nikola

Odessa Novosti, 1914

4n2K/5p2/p7/k2p4/2PBP3/P2P1Q2/1PB3n1/4b3

#2

9 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.b4#
    • 1...Bg3
      • 2.b4#
    • 1...Bh4
      • 2.b4#
    • 1...dxc4
      • 2.Qf5#
    • 1...dxe4
      • 2.Qf5#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Bb6#
        • 2.Qb6#
      • 1...dxc4
        • 2.Qe5#
        • 2.Qf5#
        • 2.Qb6#
      • 1...Bf2
        • 2.Bc3#
        • 2.Qb6#
        • 2.b4#
      • 1...Sd6
        • 2.Qd8#
      • 1...Sxf6!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Bb6#
      • 1...Bxf2
        • 2.b4#
      • 1...dxc4
        • 2.Qf5#
      • 1...Bc3
        • 2.Bxc3#
      • 1...Se3
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::P(A)
    • B(a);N_GUARD,SBLOCK::P(A)
    • P(d);OGATEB,XP(F)::QAR(E)
    • P(d);OGATEB,XP(H)::QAR(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);N_GUARD::QAB(E)
      • Refutation
        • S(g);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • B(G)
    • Vars
      • B(a);N_GUARD,XQ(E)::P(A)
      • P(d);OGATEB,XP(F)::QAR(E)
      • B(a);N_GUARD,P_PINB(G)::B(G),XB(a)
      • S(b);N_GUARD::QAB(E),XB(a)
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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).