MESON Chess Problem Database

Problem Display
PID: 186063 (Q7/p3p3/2R1N3/q3pp2/2Pbkrn1/1r2N3/2R1Pp1B/bB5K w - - 0 1)

Ouellet, Charles

Problem Observer, 2017

Q7/p3p3/2R1N3/q3pp2/2Pbkrn1/1r2N3/2R1Pp1B/bB5K

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rc3#
    • 1...Rc3
      • 2.Rxc3#
    • 1...Rxe3
      • 2.Sg5#
      • 2.Rc5#
    • 1...Bab2
      • 2.Rc3#
    • 1...Bdb2
      • 2.Rc3#
    • 1...Sxe3
      • 2.Sg5#
  • Tries
    • 1.Rc5+?
      • 1...Rb7
        • 2.Rc3#
      • 1...Kxe3!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Sg5#
      • 1...Bdb2
        • 2.Rc3#
      • 1...Bdc3
        • 2.Rb2#
      • 1...Be3
        • 2.Sg3#
      • 1...Bc5
        • 2.Rb6#
      • 1...Bb6
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::B(A)+R(C)
    • R(c);N_GUARD::B(A)+R(C),XR(c)
    • B(a);S_CUTR(c)::B(A)+R(C)
    • B(d);S_CUTR(c)::B(A)+R(C)
    • S(g);SBLOCK,XS(F)::S(I)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(c);P_SPINR(c)::B(A)+R(C)
      • Refutation
        • K(e);P-FLIGHT,XS(F)
  • Actual
    • S(F);
    • Threat
      • S(I)
    • Vars
      • B(d);S_CUTR(c)::B(A)+R(C)
      • B(d);SBLOCK,S_CUTR(c)::S(F)
      • B(d);S_CUTQ(h)::QAB(J)+R(H)
      • B(d);S_CUTR(c)::QAB(J)+R(H)
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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).