MESON Chess Problem Database

Problem Display
PID: 210084 (8/3Q4/2n2k1K/8/8/8/b1B5/2B5 w - - 0 1)

Bylevski, Andrei Stepanovich

Suomen Shakki, 1998

8/3Q4/2n2k1K/8/8/8/b1B5/2B5

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Qg7#
    • 1...Sb4
      • 2.Bb2#
    • 1...Sa5
      • 2.Bb2#
    • 1...Se5
      • 2.Bg5#
    • 1...Sa7
      • 2.Bb2#
    • 1...Sb8
      • 2.Bb2#
    • 1...Sd8
      • 2.Bb2#
  • Tries
    • 1.Bb2+?
      • 1...Sd4
        • 2.Bxd4#
      • 1...Se5!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Qf5#
      • 1...Ke5
        • 2.Qd6#
      • 1...Se7
        • 2.Qxe7#
      • 1...Be6
        • 2.Qg7#
      • 1...Sb4
        • 2.Bb2#
      • 1...Sd4
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(a);SBLOCK::QAB1(D)
    • S(b);N_GUARD::B(A)
    • S(b);SBLOCK::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(A),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • B(A);
    • Threat
      • QAR1(D)
    • Vars
      • K(c);S_FLIGHT::QAB1(D)
      • S(b);N_GUARD::QAB1(D),XS(b)
      • B(a);SBLOCK::QAB1(D)
      • S(b);N_GUARD::B(A)
      • S(b);N_GUARD::QAB1(D)
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).