MESON Chess Problem Database

Problem Display
PID: 6566 (5bK1/7p/1r1p4/1N3Q2/1pk3p1/2rp3q/6R1/1R2NBB1 w - - 0 1)

Akerblom, Johan Axel

Svenska Dagbladet, 1931

5bK1/7p/1r1p4/1N3Q2/1pk3p1/2rp3q/6R1/1R2NBB1

#2

8 + 10

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Rxc2#
    • 1...Rxb5
      • 2.Qe4#
  • Tries
    • 1.Sa3+?
      • 1...bxa3
        • 2.Qe4#
      • 1...Rxa3!
    • 1.Sxd6+?
      • 1...Rxd6
        • 2.Qc5#
      • 1...Bxd6!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Rxb4#
      • 1...Qxd3
        • 2.Rxg4#
      • 1...Rxd3
        • 2.Rc2#
      • 1...Rxb5
        • 2.Qe4#
      • 1...d5
        • 2.Se5#
      • 1...Rb3
        • 2.Sb2#
      • 1...b3
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATEB::R(E),XR(a)
    • R(g);SBLOCK,XS(F)::QAR2(G)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • P(d);XS(F)::QAR2(G)
      • Refutation
        • R(a);XS(F)
    • Try
      • S(F);CHECK,XP(h)
      • Vars
        • R(g);XS(F)::QAR1(G)
      • Refutation
        • B(j);XS(F)
  • Actual
    • S(B);XP(b)
    • Threat
      • R1(A),XP(d)
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XS(B)::R(E),XP(f)
      • R(a);OGATEB,P_SPINR(a),XS(B)::R(E)
      • R(g);SBLOCK,XS(F)::QAR2(G)
      • P(h);SBLOCK::B(C)+S(B),DCHECK
      • R(a);SBLOCK::B(C)+S(B),DCHECK
      • P(d);N_GUARD,S_CUTR(a)::S(F)
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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).