MESON Chess Problem Database

Problem Display
PID: 133693 (7B/7Q/4P1R1/3PRnN1/5k2/2pB2pP/8/4K2b w - - 0 1)

Stojnic, Dragan

6/7 Prize, Dresden Olympic Ty., 2008

7B/7Q/4P1R1/3PRnN1/5k2/2pB2pP/8/4K2b

#2

10 + 5

23 Die Schwalbe 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Rxe4#
    • 1...Sd4
      • 2.Qh4#
    • 1...Sh4
      • 2.Qxh4#
    • 1...Sd6
      • 2.Qh4#
    • 1...Se7
      • 2.Qh4#
  • Tries
    • 1.Qa7?
      • threat
        • 2.Rxf5#
      • 1...Sg7
        • 2.Qe3#
      • 1...g2
        • 2.Qf2#
      • 1...Be4
        • 2.Rxe4#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
      • 1...Sh6
        • 2.Qe3#
      • 1...Se7
        • 2.Qe3#
      • 1...Sd4!
    • 1.Qc7?
      • threat
        • 2.Re4#
      • 1...Be4
        • 2.Rxe4#
      • 1...Se3
        • 2.Rf5#
      • 1...Sd4
        • 2.Re2#
      • 1...Sh4
        • 2.Re2#
      • 1...Sh6
        • 2.Re2#
      • 1...Se7
        • 2.Re2#
      • 1...Sg7
        • 2.Re2#
      • 1...Sd6!
    • 1.Qf7?
      • threat
        • 2.Qxf5#
      • 1...Be4
        • 2.Rxe4#
      • 1...g2!
  • Keys
    • 1.Re2!
      • threat
        • 2.Be5#
      • 1...Be4
        • 2.Rxe4#
      • 1...Se3
        • 2.Qc7#
      • 1...Sg7
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::R1(E),XB(a)
    • S(e);N_GUARD::QAR2(I)
    • S(e);N_GUARD::QAR2(I),XS(e)
  • Tries
    • Try
      • Q(I);
      • Threat
        • R1(E),XS(e)
      • Vars
        • S(e);N_GUARD::QAB1(I)
        • P(c);N_GUARD,S_CUTB(a)::QAR2(I)
        • B(a);N_GUARD::R1(E),XB(a)
        • S(e);N_GUARD::QAB1(I),XS(e)
      • Refutation
        • S(e);
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(E),DCHECK
      • Vars
        • B(a);::QAB(I)+R(E),DCHECK,XB(a)
        • S(e);SBLOCK::QAB(I)+R(E),DCHECK
        • S(e);N_GUARD::QAB(I)+R(E)
      • Refutation
        • S(e);
    • Try
      • Q(I);P_PINS(e)
      • Threat
        • QAR1(I),XS(e)
      • Vars
        • B(a);N_GUARD::R1(E),XB(a)
      • Refutation
        • P(c);
  • Actual
    • R(E);
    • Threat
      • B(J)
    • Vars
      • B(a);N_GUARD::R1(E),XB(a)
      • S(e);N_GUARD::QAB(I)
      • S(e);N_GUARD::QAR2(I)
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).