MESON Chess Problem Database

Problem Display
PID: 125360 (Q7/3p4/1nnpr3/1Ppk1P2/2r1NR2/4R2B/3N1K2/B7 w - - 0 1)

Petite, Efren

Source?, 1980

Q7/3p4/1nnpr3/1Ppk1P2/2r1NR2/4R2B/3N1K2/B7

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Rd3#
    • 1...Rc2
      • 2.Rd3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Ra4
      • 2.Sc3#
    • 1...Rb4
      • 2.Sc3#
    • 1...Rd4
      • 2.Sc3#
    • 1...Re5
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Re7
      • 2.Sf6#
    • 1...Re8
      • 2.Sf6#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Sc3#
      • 1...Sa4
        • 2.Qxc4#
      • 1...Rxe4!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Sc3#
        • 2.Sf6#
      • 1...Rcxe4
        • 2.Rd3#
      • 1...Rexe4
        • 2.Qg8#
      • 1...Rc3
        • 2.Sxc3#
        • 2.Sf6#
      • 1...Rf6
        • 2.Sc3#
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(a);N_GUARD::R(D)
    • R(a);N_GUARD,P_PINS(B)::R(D)
    • R(a);N_GUARD::S(F),XR(a)
    • R(a);N_GUARD::S(F)
    • R(g);N_GUARD::S(F)
    • R(g);N_GUARD::S(F),XR(g)
  • Tries
    • Try
      • Q(J);N_PINS(e),P_PINR(a)
      • Threat
        • S(F)
      • Vars
        • S(d);N_GUARD::QAB1(J),XR(a)
      • Refutation
        • R(g);XS(F)
  • Actual
    • B(E);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);N_GUARD,P_SPINR(a),XS(F)::R(D)
      • R(g);OGATEB,P_SPINR(g),XS(F)::QAB(J)
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).