MESON Chess Problem Database

Problem Display
PID: 274325 (1R3b2/5N2/2p5/2kn2RK/6p1/1B6/4Np1B/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Troll, 2023

(First published on Wed Mar 15 2023)

1R3b2/5N2/2p5/2kn2RK/6p1/1B6/4Np1B/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Bxd6#
    • 1...Bh6
      • 2.Bd6#
    • 1...Bg7
      • 2.Bd6#
    • 1...f1B
      • 2.Bg1#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Be3#
      • 1...Bg7
        • 2.Bd6#
      • 1...f1S!
  • Keys
    • 1.Be5!
      • threat
        • 2.Bd4#
      • 1...Sf4+
        • 2.Bxf4#
      • 1...Sf6+
        • 2.Bxf6#
      • 1...Sb6
        • 2.Bd6#
      • 1...Bg7
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD::B(B),XB(f)
    • B(f);N_GUARD::B(B)
    • P(a);OGATEB::B(B)
  • Tries
    • Try
      • B(B);
      • Threat
        • B(B)
      • Vars
        • B(f);N_GUARD::B(B)
      • Refutation
        • P(a);
  • Actual
    • B(B);N_PINS(d)
    • Threat
      • B(B)
    • Vars
      • S(d);CHECK,OGATEB::R(D)+B(B),XS(d)
      • S(d);::R(D)+B(B),DCHECK
      • B(f);N_GUARD::B(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).