MESON Chess Problem Database

Problem Display
PID: 144411 (BrN1n3/1PPnp3/N1k1q2R/8/b1P3p1/3P4/8/2Q3K1 w - - 0 1)

Kallio, Timo

2nd Prize, Rotterdam TT, 1991

BrN1n3/1PPnp3/N1k1q2R/8/b1P3p1/3P4/8/2Q3K1

#2

10 + 8

702 Phenix 1991
422 Suomen Tehtavaniekat 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa8
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rxc8
      • 2.bxc8S#
    • 1...Sc5
      • 2.cxb8S#
    • 1...Se5
      • 2.cxb8S#
    • 1...Sb6
      • 2.cxb8S#
    • 1...Sdf6
      • 2.cxb8S#
    • 1...Sf8
      • 2.cxb8S#
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qe4#
      • 1...Rxc8
        • 2.bxc8S#
      • 1...Sxc7
        • 2.Sb4#
      • 1...Sc5
        • 2.cxb8S#
      • 1...Se5
        • 2.cxb8S#
      • 1...Sb6
        • 2.cxb8S#
      • 1...Sdf6
        • 2.cxb8S#
      • 1...Sf8
        • 2.cxb8S#
      • 1...Sd6
        • 2.Sa7#
      • 1...Sef6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(g);OGATE,XB(I)::PXR(g)=Q
    • R(g);OGATE,XS(J)::PXR(g)=S
    • S(e);N_GUARD::PXR(g)=S
    • S(e);N_GUARD,N_SPINQ(d)::PXR(g)=S
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(g);OGATE,XS(J)::PXR(g)=S
      • S(h);SBLOCK,XP(H)::S(E)
      • S(e);N_GUARD::PXR(g)=S
      • S(e);N_GUARD,N_SPINQ(d)::PXR(g)=S
      • S(h);N_SPINQ(d),SBLOCK::S(J)
      • S(h);N_GUARD,N_SPINQ(d)::QAR2(A),XQ(d)
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).