MESON Chess Problem Database

Problem Display
PID: 114195 (6n1/5Npq/5p2/3prBPp/5kpQ/K2R1PN1/4p1P1/3n1r2 w - - 0 1)

Stocchi, Ottavio

Il Due Mosse, 1952

6n1/5Npq/5p2/3prBPp/5kpQ/K2R1PN1/4p1P1/3n1r2

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Sxh5#
    • 1...Rxf3
      • 2.Rxf3#
    • 1...Rxf5
      • 2.Sxe2#
  • Tries
    • 1.Bxh7?
      • threat
        • 2.Sxh5#
      • 1...Rxg5
        • 2.Sxe2#
      • 1...g6!
  • Keys
    • 1.fxg4!
      • threat
        • 2.gxh5#
      • 1...Qxf5
        • 2.gxf5#
      • 1...hxg4
        • 2.Qxg4#
      • 1...fxg5
        • 2.Qxg5#
      • 1...Rh1
        • 2.Rf3#
      • 1...Sf2
        • 2.Rf3#
      • 1...Se3
        • 2.Sxe2#
      • 1...Sh6
        • 2.Sxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(k);N_GUARD,SBLOCK,XB(G)::S(E),XP(h)
    • R(b);OGATE,P_PINR(C),XP(D)::R1(C),XR(b)
    • R(g);N_GUARD,SBLOCK,XB(G)::S(E),XP(c)
  • Tries
    • Try
      • B(G);XQ(k)
      • Threat
        • S(E),XP(h)
      • Vars
        • R(g);N_GUARD,XP(H)::S(E),XP(c)
      • Refutation
        • P(j);
  • Actual
    • P(D);XP(e)
    • Threat
      • QAR(F)+P(D),XP(h)
    • Vars
      • Q(k);OGATE,XB(G)::QAR(F)+P(D),XQ(k)
      • P(h);OGATE,P_SPINP(h),XP(D)::QAR1(F),XP(h)
      • P(i);OGATE,XP(H)::QAB1(F),XP(i)
      • R(b);N_GUARD::R1(C)
      • S(a);S_CUTR(b)::R1(C)
      • S(a);S_CUTR(g)::S(E),XP(c)
      • S(l);S_CUTQ(k)::S(E),XP(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).