MESON Chess Problem Database

Problem Display
PID: 109609 (b3B3/2N1b3/r5R1/2R2p1K/2n2k2/5p2/q2N4/4Q3 w - - 0 1)

Velko, Aleksandrov

Scacco!, 1999

b3B3/2N1b3/r5R1/2R2p1K/2n2k2/5p2/q2N4/4Q3

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Se6#
    • 1...Ra4
      • 2.Se6#
    • 1...Ra5
      • 2.Se6#
    • 1...Rc6
      • 2.Sd5#
    • 1...Re6
      • 2.Sxe6#
    • 1...Ra7
      • 2.Se6#
    • 1...Bd6
      • 2.Se6#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Bc6
      • 2.Se6#
    • 1...Sb2
      • 2.Qe5#
    • 1...Sxd2
      • 2.Qe5#
    • 1...Sa3
      • 2.Qe5#
    • 1...Se3
      • 2.Qg3#
    • 1...Sa5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sb6
      • 2.Qe5#
    • 1...Sd6
      • 2.Qe5#
  • Tries
    • 1.Rgc6?
      • threat
        • 2.Sd5#
        • 2.Se6#
      • 1...Qxd2
        • 2.Se6#
      • 1...Rxc6
        • 2.Sd5#
      • 1...Bxc6
        • 2.Se6#
      • 1...Sxd2
        • 2.Qe5#
      • 1...f2
        • 2.Qxf2#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sa3
        • 2.Qe5#
      • 1...Sa5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sb6
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Se3!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Sd5#
        • 2.Se6#
      • 1...Qxd2
        • 2.Se6#
      • 1...Rxc6
        • 2.Sd5#
      • 1...Bxc6
        • 2.Se6#
      • 1...Sxd2
        • 2.Qe5#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sa3
        • 2.Qe5#
      • 1...Se3
        • 2.Qg3#
      • 1...Sa5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sb6
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(f);N_GUARD::S(F)
    • R(f);S_CUTB(h)::S(F)
    • R(f);N_GUARD::S(F),XR(f)
    • B(g);S_CUTR(f)::S(F)
    • B(h);N_GUARD::S(F),XB(h)
    • B(h);S_CUTR(f)::S(F)
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD,XS(B)::QAB1(A)
    • S(c);SBLOCK::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XS(B)::S(F)
        • R(f);XR(E)::S(F)
        • B(h);XR(E)::S(F)
        • S(c);N_GUARD,XS(B)::QAB1(A)
        • P(b);OGATEB::QAR2(A),XP(b)
        • S(c);N_GUARD::QAB1(A)
        • S(c);N_GUARD::QAB1(A),XS(c)
      • Refutation
        • S(c);
  • Actual
    • B(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);XS(B)::S(F)
      • R(f);XB(G)::S(F)
      • B(h);XB(G)::S(F)
      • S(c);N_GUARD,XS(B)::QAB1(A)
      • S(c);N_GUARD::QAB1(A)
      • S(c);SBLOCK::QAB1(A)
      • S(c);N_GUARD::QAB1(A),XS(c)
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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).