MESON Chess Problem Database

Problem Display
PID: 287353 (4bb2/Q7/4p2p/5N1k/1P3P2/6Kp/8/1B6 w - - 0 1)

Kalgin, Mikhail Invanovich

Uralski Problemist, 2005

4bb2/Q7/4p2p/5N1k/1P3P2/6Kp/8/1B6

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qf7#
    • 1...Bb5
      • 2.Qf7#
    • 1...Bc6
      • 2.Qf7#
    • 1...Bf7
      • 2.Qxf7#
    • 1...Bxb4
      • 2.Sg7#
    • 1...Bc5
      • 2.Sg7#
    • 1...Bd6
      • 2.Sg7#
    • 1...Be7
      • 2.Sg7#
    • 1...Bg7
      • 2.Sxg7#
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxe8#
      • 1...Kg6
        • 2.Sg7#
      • 1...Bxe7
        • 2.Sg7#
      • 1...Bg6
        • 2.Qh4#
      • 1...Ba4
        • 2.Qf7#
      • 1...Bb5
        • 2.Qf7#
      • 1...Bc6
        • 2.Qf7#
      • 1...Bd7
        • 2.Qf7#
      • 1...Bf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(e);N_GUARD::QAB(F)
    • B(e);N_GUARD::QAB(F),XB(e)
    • B(f);N_GUARD,XP(C)::S(E)
    • B(f);N_GUARD::S(E)
    • B(f);N_GUARD,P_PINP(D)::S(E)
    • B(f);N_GUARD::S(E),XB(f)
  • Actual
    • Q(F);
    • Threat
      • QAB(F),XB(e)
    • Vars
      • K(b);S_CUTB(f),S_FLIGHT::B(A)+S(E)
      • B(f);N_GUARD,XQ(F)::S(E)
      • B(e);SBLOCK::QAR1(F)
      • B(e);N_GUARD::QAB(F)
      • B(e);N_GUARD::QAB(F),XB(e)
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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).