MESON Chess Problem Database

Problem Display
PID: 64216 (3N4/8/1Q1P3R/4k3/1KP1np1b/1npB1bp1/3pr2N/5rB1 w - - 0 1)

Stocchi, Ottavio

2nd Prize, Il Due Mosse, 1952

3N4/8/1Q1P3R/4k3/1KP1np1b/1npB1bp1/3pr2N/5rB1

#2

9 + 11

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Sxf3#
      • 2.Sf7#
      • 2.Re6#
    • 1...Sc5
      • 2.Sf7#
    • 1...Sxd6
      • 2.Re6#
      • 2.Qxd6#
  • Tries
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qd5#
      • 1...Sxd4!
    • 1.Qc5+?
      • 1...Sexc5
        • 2.Sf7#
      • 1...Sbxc5!
    • 1.Qb5+?
      • 1...Sec5
        • 2.Sf7#
        • 2.Re6#
      • 1...Sbc5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qd5#
      • 1...Kf5
        • 2.Qd5#
      • 1...Sxd6
        • 2.Re6#
      • 1...Sf2
        • 2.Sxf3#
      • 1...Sec5
        • 2.Sf7#
      • 1...Sg5
        • 2.Qg7#
      • 1...Sf6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(h);::S(I)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(k);P-FLIGHT,P_SPINS(h)::QAR2(F)
      • Refutation
        • S(d);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • S(h);XQ(F)::S(I)
      • Refutation
        • S(d);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • K(k);P-FLIGHT,P_SPINS(h)::QAR2(F)
      • S(h);XP(G)::R1(H)
      • S(h);S_CUTR(a)::S(B),XB(f)
      • S(h);::S(I)
      • S(h);N_GUARD,S_CUTB(j)::QAB(F)
      • S(h);S_CUTB(j)::QAR2(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).