MESON Chess Problem Database

Problem Display
PID: 109855 (b4Bq1/6N1/3p2Rn/N1P2p2/1r1k1P2/2R2Q2/1bn3K1/1B6 w - - 0 1)

Belliboni, Caetano

O Estado de Sao Paulo, 1954

b4Bq1/6N1/3p2Rn/N1P2p2/1r1k1P2/2R2Q2/1bn3K1/1B6

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qh7
      • 2.Se6#
    • 1...Qxg7
      • 2.Bxg7#
    • 1...Qxf8
      • 2.Se6#
    • 1...Qh8
      • 2.Se6#
    • 1...Rc4
      • 2.Sb3#
    • 1...Rb7
      • 2.Sc6#
      • 2.Qd3#
    • 1...Bc6
      • 2.Sxc6#
    • 1...Sg4
      • 2.Sxf5#
    • 1...Sf7
      • 2.Sxf5#
      • 2.Se6#
    • 1...dxc5
      • 2.Bxc5#
      • 2.Rd3#
    • 1...d5
      • 2.Rd3#
      • 2.Qd3#
  • Tries
    • 1.Rc4+?
      • 1...Rxc4
        • 2.Sb3#
      • 1...Qxc4!
  • Keys
    • 1.Rxd6+!
      • 1...Qd5
        • 2.Se6#
      • 1...Bd5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD::S(I),XQ(i)
    • Q(i);N_GUARD::S(I)
    • Q(i);OGATE,P_PINR(H),XS(I)::B(J),XQ(i)
    • Q(i);N_GUARD,XB(J)::S(I)
    • R(c);N_GUARD,S_CUTQ(i)::S(F)
    • B(h);N_GUARD::S(F),XB(h)
    • S(g);N_GUARD::S(I),XP(e)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • R(c);SBLOCK,XR(C)::S(F)
      • Refutation
        • Q(i);XR(C)
  • Actual
    • R(H);CHECK,P_SPINS(I),XP(f)
    • Vars
      • Q(i);N_PINS(I),P_SPINQ(i)::S(I)
      • B(h);P_SPINB(h)::S(F)
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).