MESON Chess Problem Database

Problem Display
PID: 63962 (2N5/pn2q3/R3pp2/2bk1nQ1/2RP2pr/3Pp2r/8/1K1B1N2 w - - 0 1)

Stocchi, Ottavio

3rd Prize, Miskolcsi Magasapitok, 1952

2N5/pn2q3/R3pp2/2bk1nQ1/2RP2pr/3Pp2r/8/1K1B1N2

#2

9 + 12

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sxe3#
    • 1...Rh2
      • 2.Sxe3#
    • 1...Sd6
      • 2.Sxe7#
    • 1...g3
      • 2.Sxe3#
  • Tries
    • 1.Bf3+?
      • 1...gxf3
        • 2.Sxe3#
      • 1...Rxf3!
    • 1.Qxf5+?
      • 1...e5
        • 2.Qe4#
      • 1...exf5!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe4#
      • 1...Sg3
        • 2.Sxe3#
      • 1...Sfd6
        • 2.Sxe7#
      • 1...Sbd6
        • 2.Rxc5#
      • 1...g3
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::S(C),XP(a)
    • S(k);S_CUTB(e)::S(I),XQ(l)
    • P(c);S_CUTR(b)::S(C),XP(a)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(c);XB(B)::S(C),XP(a)
      • Refutation
        • R(b);XB(B)
    • Try
      • Q(G);CHECK,XS(g)
      • Vars
        • P(h);P_SPINP(h)::QAB1(G)
      • Refutation
        • P(h);XQ(G)
  • Actual
    • Q(G);N_PINS(g)
    • Threat
      • QAB1(G)
    • Vars
      • S(g);N_GUARD,S_CUTR(b)::S(C),XP(a)
      • S(g);N_GUARD,S_CUTB(e)::S(I),XQ(l)
      • S(k);N_GUARD,S_CUTQ(l)::R1(E),XB(e)
      • P(c);N_GUARD,S_CUTR(b)::B(B)
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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).