MESON Chess Problem Database

Problem Display
PID: 157022 (8/B7/p6K/3N1Q2/B1kP1p2/p2Nb2R/1P1r2b1/2n5 w - - 0 1)

Andersson, Gunnar

Ajan Sana, 1932

8/B7/p6K/3N1Q2/B1kP1p2/p2Nb2R/1P1r2b1/2n5

#2

9 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.b3#
    • 1...Se2
      • 2.b3#
    • 1...Sxd3
      • 2.b3#
    • 1...f3+
      • 2.Sxe3#
  • Tries
    • 1.Qc8+?
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kxd3!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Se5#
      • 1...f3+
        • 2.S5f4#
      • 1...Kxd3
        • 2.Sxf4#
      • 1...Rxd3
        • 2.Qc6#
      • 1...Bxd5
        • 2.Qxa6#
      • 1...Bxd4
        • 2.Sb6#
      • 1...Sxd3
        • 2.b3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::P(A)
    • S(a);N_GUARD,XS(B)::P(A)
    • P(g);CHECK,N_GUARD::S(F),XB(e)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(F)::QAB1(G)
      • Refutation
        • K(f);P_SPINB(e),S_FLIGHT,XS(B)
  • Actual
    • Q(G);
    • Threat
      • S(B)
    • Vars
      • P(g);CHECK,S_CUTB(c)::QAB(G)+S(F)
      • K(f);P_SPINB(e),S_FLIGHT,XS(B)::S(F),XP(g)
      • R(b);SBLOCK,XS(B)::QAR2(G)
      • B(c);P_SPINB(c),SBLOCK,XS(F)::QAB(G),XP(h)
      • B(e);SBLOCK,XP(E)::QAB(G)+S(F),DCHECK
      • S(a);N_GUARD,SBLOCK,XS(B)::P(A)
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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).