MESON Chess Problem Database

Problem Display
PID: 43487 (7b/2ppRK2/n1r2p2/3k2p1/bQ1PN3/1P3P2/1n2N3/2Rr4 w - - 0 1)

Stocchi, Ottavio

3rd Prize, Suomen Shakki, 1950

7b/2ppRK2/n1r2p2/3k2p1/bQ1PN3/1P3P2/1n2N3/2Rr4

#2

9 + 11

5407 Selected Stocchi (II) 2004
273 Mat Plus 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qxd4#
    • 1...Sc4
      • 2.S4c3#
    • 1...Sc5
      • 2.S2c3#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Rc5+?
      • 1...Sxc5
        • 2.S2c3#
      • 1...Rxc5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Rxd7#
      • 1...Rxd4
        • 2.S2c3#
      • 1...Sc4
        • 2.bxc4#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sb8
        • 2.Rc5#
      • 1...d6
        • 2.S4c3#

There are these afters: 75420

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE,XP(F)::QAR1(E),XR(a)
    • S(b);S_CUTR(g)::S(G)
    • S(f);S_CUTR(g)::S(B)
    • P(e);N_GUARD::S(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(f);XR(A)::S(B)
      • Refutation
        • R(g);XR(A)
  • Actual
    • Q(E);P_PINR(g)
    • Threat
      • R(H),XP(j)
    • Vars
      • R(a);SBLOCK,XP(F)::S(B)
      • S(b);OGATE::P(C),XS(b)
      • S(f);N_GUARD::R1(A),XS(f)
      • S(f);N_GUARD::R1(A)
      • P(j);SBLOCK::S(G)
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).