MESON Chess Problem Database

Problem Display
PID: 51802 (1b5q/8/2B1p1p1/Rn1nNkB1/2b4p/1Np1QP2/8/7K w - - 0 1)

Erokhin, Vladimir Alekseevich

1/2 Prize, Zadachi i Etyudi, 2001

1b5q/8/2B1p1p1/Rn1nNkB1/2b4p/1Np1QP2/8/7K

#2

8 + 10

145 StrateGems 2004
56 The Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sd6
      • 2.Sd4#
    • 1...Sa7
      • 2.Sd4#
    • 1...Sbc7
      • 2.Sd4#
    • 1...Sb4
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sb6
      • 2.Qf4#
    • 1...Sf6
      • 2.Qf4#
    • 1...Sdc7
      • 2.Qf4#
    • 1...Se7
      • 2.Qf4#
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qe4#
      • 1...Sxe3
        • 2.Be4#
      • 1...e5
        • 2.Bd7#
      • 1...Qd4
        • 2.Sh6#
      • 1...Qe5
        • 2.Sh6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sd6
        • 2.Qf4#
      • 1...Sf6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • S(d);N_GUARD::S(B)
    • S(d);N_GUARD::S(B),XS(d)
    • S(e);N_GUARD::QAR1(C)
    • S(e);N_GUARD::QAR1(C),XS(e)
  • Actual
    • S(F);
    • Threat
      • QAB1(C)
    • Vars
      • S(e);OGATE,P_SPINS(d),XQ(C)::B(H)
      • P(g);OGATEB::B(H)
      • Q(j);N_GUARD::S(F)
      • B(b);N_GUARD::QAB(C),XB(b)
      • S(d);P_SPINS(e),S_CUTB(i)::QAR1(C)
      • S(e);P_SPINS(d),S_CUTQ(j)::S(B)
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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).