MESON Chess Problem Database

Problem Display
PID: 158667 (1B1n4/3P4/2PR1P2/4kpP1/1NK1Np2/1r6/b2P2qr/b3R3 w - - 0 1)

Retter, Yosef

1st Prize, Budapest Meeting TT, 1988

1B1n4/3P4/2PR1P2/4kpP1/1NK1Np2/1r6/b2P2qr/b3R3

#2

11 + 9

721 Variantim 1989

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Sd3#
    • 1...Sxc6
      • 2.Sxc6#
      • 2.Rxc6#
    • 1...Se6
      • 2.Rd5#
  • Tries
    • 1.Sc5+?
      • 1...Qe4+
        • 2.Rd4#
      • 1...Qe2+
        • 2.Rd3#
      • 1...Re3+!
  • Keys
    • 1.Sc3+!
      • 1...Qe4+
        • 2.d4#
      • 1...Qe2+
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);S_CUTR(e)::S(C)
    • S(i);SBLOCK::B(K)+R(H),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);CHECK,P_SPINQ(c)::B(K)+R(H)
      • Refutation
        • R(e);CHECK,P_SPINR(e)
  • Actual
    • S(E);CHECK
    • Vars
      • Q(c);CHECK,P_SPINQ(c)::P(B)
      • Q(c);CHECK,P_SPINQ(c)::S(C)
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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).