MESON Chess Problem Database

Problem Display
PID: 73392 (3R3b/P4N2/pp2p2B/q4P2/PrQnk3/1p5B/1KpRp3/2nrN3 w - - 0 1)

Koludrovic, Branko

2nd HM., Problem Online, 2004-2005

3R3b/P4N2/pp2p2B/q4P2/PrQnk3/1p5B/1KpRp3/2nrN3

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Rxe2#
      • 2.Qd3#
    • 1...Sd3+
      • 2.Qxd3#
    • 1...b5
      • 2.a8Q#
      • 2.a8B#
    • 1...exf5
      • 2.Bg2#
    • 1...e5
      • 2.Sd6#
  • Tries
    • 1.Qxe6+?
      • 1...Qe5
        • 2.Sd6#
      • 1...Be5
        • 2.Sd6#
      • 1...Sxe6+!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe3#
      • 1...Sd3+
        • 2.Qxd3#
      • 1...Sxf5
        • 2.Bg2#
      • 1...Sf3
        • 2.Sd6#
      • 1...Sb5
        • 2.a8Q#
        • 2.a8B#
      • 1...Sc6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(a);CHECK,N_GUARD::QAB1(F),XS(a)
    • P(k);S_CUTQ(i)::P=Q
    • P(l);SBLOCK,XP(G)::B(D)
    • P(l);SBLOCK::S(J)
  • Tries
    • Try
      • Q(F);CHECK,N_PINS(g),XP(l)
      • Vars
        • Q(i);P_SPINQ(i)::S(J)
        • B(m);P_SPINB(m)::S(J)
      • Refutation
        • S(g);CHECK,XQ(F)
  • Actual
    • Q(F);N_PINS(g)
    • Threat
      • QAR1(F)
    • Vars
      • S(a);CHECK,N_GUARD::QAB1(F),XS(a)
      • S(g);N_GUARD,P_PINQ(F),SBLOCK,XP(G)::B(D)
      • S(g);P_PINQ(F)::S(J)
      • S(g);N_GUARD,P_PINQ(F),S_CUTQ(i)::P=Q
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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).