MESON Chess Problem Database

Problem Display
PID: 204605 (8/2ppBBp1/1Q6/1pN5/q1Pk1P2/R1nPpP2/7N/4n2K w - - 0 1)

Wirtanen, Erkki Aukusti

Freie Presse, 1966

8/2ppBBp1/1Q6/1pN5/q1Pk1P2/R1nPpP2/7N/4n2K

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd3
      • 2.Sb3#
    • 1...Sxf3
      • 2.Sxf3#
    • 1...Sb1
      • 2.Se6#
    • 1...Sd1
      • 2.Se6#
    • 1...Sa2
      • 2.Se6#
    • 1...Se2
      • 2.Se6#
    • 1...Se4
      • 2.Se6#
    • 1...Sd5
      • 2.Se6#
    • 1...g5
      • 2.Bf6#
      • 2.Qf6#
    • 1...g6
      • 2.Bf6#
      • 2.Qf6#
  • Tries
    • 1.Qd6+?
      • 1...Sd5
        • 2.Qe5#
        • 2.Qxd5#
      • 1...cxd6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxg7#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...e2
        • 2.Qg1#
      • 1...d6
        • 2.Se6#
      • 1...Qa6
        • 2.Sb3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sd5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);SBLOCK,XP(D)::QAB(I)+S(H),DCHECK
    • S(a);XP(E)::S(B),XS(a)
    • S(b);::QAB(I)+S(H),DCHECK
  • Tries
    • Try
      • Q(I);CHECK
      • Refutation
        • P(g);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB(I),XP(i)
    • Vars
      • S(a);OGATE,XP(D)::QAR1(I),XS(a)
      • S(a);XP(E)::S(B),XS(a)
      • P(c);OGATEB::QAB(I)
      • P(h);N_GUARD::S(H)
      • Q(d);N_GUARD::S(H)
      • S(b);N_GUARD::QAR1(I),XS(b)
      • S(b);N_GUARD::QAR1(I)
HTML5 logo

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).