MESON Chess Problem Database

Problem Display
PID: 67424 (2B5/5n2/3P1BQ1/2pr1P1q/4kN1R/2Kp1N1r/2PPb3/5R2 w - - 0 1)

Stocchi, Ottavio

Schweizerische Arbeiter Schachzeitung, 1954

2B5/5n2/3P1BQ1/2pr1P1q/4kN1R/2Kp1N1r/2PPb3/5R2

#2

12 + 8

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Sxh3#
    • 1...Rxf5
      • 2.Bb7#
  • Tries
    • 1.Sxh3+?
      • 1...Qg4
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Qxh4!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Sg5#
      • 1...Qxf3
        • 2.Sxh3#
      • 1...Rxf3
        • 2.Sxh5#
      • 1...Bxf3
        • 2.Re1#
      • 1...dxc2
        • 2.Qxe2#
      • 1...Qg5
        • 2.Sxg5#
      • 1...Sg5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(g);N_GUARD,P_SPINQ(g),XP(H)::R(G)+S(F),XR(c)
    • R(f);OGATEB,P_SPINR(f),XP(H)::B(L)
  • Tries
    • Try
      • S(F);CHECK,XR(c)
      • Refutation
        • Q(g);XR(G)
  • Actual
    • Q(K);
    • Threat
      • QAB(K)+S(E),DCHECK
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XS(E)::R(G)+S(F),XR(c)
      • R(c);N_GUARD,P_SPINR(c),XS(E)::R(G)+S(F),XQ(g)
      • B(a);OGATEB,P_SPINB(a),XS(E)::R(A)
      • P(b);N_GUARD,P_PINS(E),XP(B)::QAR2(K),XB(a)
      • Q(g);::QAB(K)+S(E),DCHECK,XQ(g)
      • S(h);::QAB(K)+S(E),DCHECK,XS(h)
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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).