MESON Chess Problem Database

Problem Display
PID: 173205 (1k6/1N6/R1K2p2/1N2q3/p1p1p3/7B/1Rp4B/8 w - - 0 1)

Nikitin, Aleksandr Olegovich

3rd Prize, Problem Observer, 1982

1k6/1N6/R1K2p2/1N2q3/p1p1p3/7B/1Rp4B/8

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Bxg3#
    • 1...Qf4
      • 2.Bxf4#
    • 1...Qd6+
      • 2.Bxd6#
    • 1...Qc7+
      • 2.Bxc7#
  • Keys
    • 1.Sc7!
      • threat
        • 2.Ra8#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qxc7+
        • 2.Bxc7#
      • 1...Qb5+
        • 2.Sxb5#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qd5+
        • 2.Sxd5#
      • 1...Qe6+
        • 2.Sd6#
      • 1...Qe8+
        • 2.Sxe8#
      • 1...Qa5
        • 2.Sxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(e);OGATEB::B(B),XQ(e)
    • Q(e);CHECK,OGATE::B(B),XQ(e)
  • Actual
    • S(D);N_PINQ(e)
    • Threat
      • R1(E)
    • Vars
      • Q(e);CHECK,N_GUARD::R(A)+S(G),XQ(e)
      • Q(e);CHECK,OGATE,P_SPINQ(e),XS(D)::B(B),XQ(e)
      • Q(e);CHECK::B(B)+S(D),XQ(e)
      • Q(e);CHECK,N_GUARD::R(A)+S(G)
      • Q(e);N_GUARD::R(A)+S(G),XQ(e)
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).