MESON Chess Problem Database

Problem Display
PID: 51413 (8/7p/1p2N2K/3p4/R1bBkN2/R1b4Q/3p4/3n4 w - - 0 1)

Petkov, Petko Andonov

1st HM., BCPS Ring Ty., 1959

8/7p/1p2N2K/3p4/R1bBkN2/R1b4Q/3p4/3n4

#2

7 + 8

1355 The Guardian 1959

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qd3#
    • 1...Bb3
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
  • Tries
    • 1.Sg5+?
      • 1...Kxf4
        • 2.Qf3#
      • 1...Kxd4!
    • 1.Qf3+?
      • 1...Kf5
        • 2.Sg7#
      • 1...Kxf3!
  • Keys
    • 1.Sd3!
      • 1...Bxd4
        • 2.Sg5#
      • 1...Bxd3
        • 2.Qg4#
      • 1...Se3
        • 2.Sf2#
      • 1...Ba1
        • 2.Qg4#
      • 1...Bb2
        • 2.Qg4#
      • 1...Bb4
        • 2.Qg4#
      • 1...Ba5
        • 2.Qg4#
      • 1...Ba2
        • 2.Sg5#
      • 1...Bb3
        • 2.Sg5#
      • 1...Bb5
        • 2.Sg5#
      • 1...Ba6
        • 2.Sg5#
      • 1...Sb2
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#
      • 1...b5
        • 2.Sdc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • B(d);N_GUARD::QAB1(B)
    • B(d);N_GUARD::QAB1(B),XB(d)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(E)::QAR1(B)
      • Refutation
        • K(e);P-FLIGHT,P_SPINB(d),XB(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);S_FLIGHT::S(F)
      • Refutation
        • K(e);P_SPINB(c),S_FLIGHT,XQ(B)
  • Actual
    • S(E);
    • Vars
      • B(c);SBLOCK,XB(D)::S(F)
      • B(d);SBLOCK,XS(E)::QAR2(B)
      • S(a);N_GUARD::S(E)
      • B(c);::QAR2(B)
      • B(d);::S(F)
      • S(a);N_GUARD::S(E),XS(a)
      • P(g);N_GUARD::S(E)
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).