MESON Chess Problem Database

Problem Display
PID: 67134 (3rN3/Qp6/6bK/3rp3/PPk1n1BR/1pP1R3/q7/5N2 w - - 0 1)

Avner, Uri

2nd Place, Messigny, 1995

3rN3/Qp6/6bK/3rp3/PPk1n1BR/1pP1R3/q7/5N2

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Be2#
    • 1...Sf2
      • 2.Be2#
    • 1...Sxc3
      • 2.Be2#
    • 1...Sg3
      • 2.Be2#
    • 1...Sc5
      • 2.Be2#
    • 1...Sg5
      • 2.Be2#
    • 1...Sd6
      • 2.Be2#
    • 1...Sf6
      • 2.Be2#
  • Tries
    • 1.Be2+?
      • 1...Rd3
        • 2.Qc5#
      • 1...Qxe2!
    • 1.Qc5+?
      • 1...Sxc5
        • 2.Be2#
      • 1...Rxc5!
  • Keys
    • 1.Be6!
      • threat
        • 2.Qc5#
      • 1...b2
        • 2.Sd2#
      • 1...Rc8
        • 2.Sd6#
      • 1...b6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • S(d);::R(G)+B(F),DCHECK
    • S(d);XP(B)::R(G)+B(F),DCHECK
  • Tries
    • Try
      • B(F);CHECK,P_PINS(d)
      • Vars
        • R(e);P_SPINR(e)::QAR1(I)
      • Refutation
        • Q(a);XB(F)
    • Try
      • Q(I);CHECK
      • Vars
        • S(d);XQ(I)::R(G)+B(F),DCHECK
      • Refutation
        • R(e);XQ(I)
  • Actual
    • B(F);P_PINR(e),P_PINS(d)
    • Threat
      • QAR1(I)
    • Vars
      • P(b);S_CUTQ(a)::S(A)
      • R(i);N_GUARD::S(J)
      • P(h);OGATE::QAR(I)
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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).