MESON Chess Problem Database

Problem Display
PID: 63967 (4RRn1/7B/2PN1b2/1Q1b2p1/K1p2k1N/pp2prpP/1pq5/3r4 w - - 0 1)

Stocchi, Ottavio

1st Prize, Skakbladet, 1951

4RRn1/7B/2PN1b2/1Q1b2p1/K1p2k1N/pp2prpP/1pq5/3r4

#2

9 + 14

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sg2#
    • 1...Qd3
      • 2.Sg2#
    • 1...Qe4
      • 2.Sg2#
    • 1...Qf5
      • 2.Sg2#
    • 1...Qg6
      • 2.Sg2#
      • 2.Sxg6#
    • 1...Qxh7
      • 2.Sg2#
    • 1...Qc1
      • 2.Sg2#
      • 2.Sg6#
    • 1...Qd2
      • 2.Sg6#
    • 1...Qe2
      • 2.Sg6#
    • 1...Qf2
      • 2.Sg6#
    • 1...Qg2
      • 2.Sxg2#
      • 2.Sg6#
    • 1...Qh2
      • 2.Sg6#
    • 1...Qc3
      • 2.Sg2#
      • 2.Sg6#
    • 1...Rd3
      • 2.Sg6#
    • 1...Be4
      • 2.Qe5#
    • 1...e2
      • 2.Sg2#
  • Tries
    • 1.Rxf6+?
      • 1...Qf5
        • 2.Sg2#
        • 2.Sg6#
        • 2.Rxf5#
      • 1...Sxf6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qb8#
      • 1...Qxe4
        • 2.Sg2#
      • 1...Bxe4
        • 2.Qe5#
      • 1...Bxc6
        • 2.Sg6#
      • 1...e2
        • 2.Sg2#
      • 1...Qc3
        • 2.Sg2#
      • 1...Be6
        • 2.Qxg5#
      • 1...Bf7
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::S(C)
    • Q(c);N_GUARD,N_SPINB(m)::S(C)
    • Q(c);N_GUARD,XB(G)::S(C)
    • R(a);S_CUTQ(c)::S(C)
    • B(k);OGATE::QAB1(D)
    • P(f);S_CUTQ(c)::S(C)
  • Tries
    • Try
      • R(I);CHECK,XB(m)
      • Refutation
        • S(n);XR(I)
  • Actual
    • S(F);
    • Threat
      • QAB(D)
    • Vars
      • Q(c);N_GUARD,XS(F)::S(C)
      • B(k);OGATE,XS(F)::QAB1(D)
      • B(k);P_PINQ(D),XP(E)::S(C)
      • P(f);S_CUTQ(c)::S(C)
      • Q(c);N_GUARD::S(C)
      • B(k);OGATE::QAB1(D),XP(l)
      • B(k);N_SPINB(m),OGATE::QAR1(D)
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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).