MESON Chess Problem Database

Problem Display
PID: 221931 (1b4K1/r2n2P1/1p1ppPkp/r6p/3N3B/qp5p/5R2/7Q w - - 0 1)

Oudot, Jean

Stella Polaris, 1967

1b4K1/r2n2P1/1p1ppPkp/r6p/3N3B/qp5p/5R2/7Q

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qe4#
      • 2.Qb1#
      • 2.Qg1#
    • 1...R5a6
      • 2.Qe4#
      • 2.Qb1#
      • 2.Qg1#
    • 1...Sc5
      • 2.Qg1#
    • 1...Se5
      • 2.Qe4#
    • 1...Sxf6+
      • 2.Rxf6#
    • 1...Sf8
      • 2.gxf8S#
    • 1...b5
      • 2.Qe4#
      • 2.Qb1#
      • 2.Qg1#
    • 1...d5
      • 2.Qb1#
    • 1...e5
      • 2.Qe4#
      • 2.Qg1#
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se7#
      • 1...Sxf6+
        • 2.Rxf6#
      • 1...Sc5
        • 2.Qg1#
      • 1...Se5
        • 2.Qe4#
      • 1...Sf8
        • 2.gxf8S#
      • 1...d5
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(l);S_CUTR(d)::QAR(A)
    • S(l);S_CUTR(d)::QAB(A)
    • S(l);CHECK,OGATE,XP(E)::R1(B),XS(l)
    • S(l);OGATE::PXS(l)=S
    • P(g);S_CUTR(d)::QAB(A)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • S(l);CHECK,OGATE,XP(E)::R1(B),XS(l)
      • S(l);S_CUTR(d)::QAR(A)
      • S(l);S_CUTR(d)::QAB(A)
      • S(l);OGATE::PXS(l)=S
      • P(g);S_CUTR(d)::QAB(A)
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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).