MESON Chess Problem Database

Problem Display
PID: 55189 (1q3b2/8/b2BBN2/8/1P1k4/r1N2Q2/8/2n4K w - - 0 1)

Avner, Uri

Einat, Paz

3rd Place, 07. WCCT, 2003-2004

1q3b2/8/b2BBN2/8/1P1k4/r1N2Q2/8/2n4K

#2

7 + 6

145 StrateGems 2004
56 The Problemist 2004
721 Variantim 2004
17424 Close Encounters with the Chess Pieces (Avner) 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3
      • 2.Qe4#
    • 1...Bb7
      • 2.Sb5#
    • 1...Sd3
      • 2.Se2#
  • Tries
    • 1.Bc5+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Bxc5!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Sg4#
      • 1...Kxc3!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qe3#
      • 1...Rxc3
        • 2.Qd5#
      • 1...Bd3
        • 2.Qf6#
      • 1...Sd3
        • 2.Se2#
      • 1...Qb7
        • 2.Be5#
      • 1...Qa8
        • 2.Be5#
      • 1...Bb7
        • 2.Sb5#
      • 1...Bh6
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XS(B)::QAR1(C)
    • B(d);N_GUARD,P_PINQ(C),S_CUTQ(e)::S(B)
    • S(a);N_GUARD,S_CUTB(d)::S(B)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
      • Refutation
        • B(f);XB(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::S(G)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
  • Actual
    • S(G);
    • Threat
      • QAB1(C)
    • Vars
      • R(b);SBLOCK,XS(B)::QAR1(C)
      • B(d);SBLOCK::QAB(C)
      • S(a);N_GUARD,S_CUTB(d)::S(B)
      • Q(e);N_GUARD,P_PINQ(C)::B(E)
      • B(d);N_GUARD,P_PINQ(C),S_CUTQ(e)::S(B)
      • B(f);N_GUARD::B(E)
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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).