MESON Chess Problem Database

Problem Display
PID: 17282 (2b1Rbn1/1N1P2r1/1rpQ2n1/5kPP/R2B1Pp1/Kp6/2Np4/3Bq3 w - - 0 1)

Stocchi, Ottavio

L'Italia Scacchistica, 1929

2b1Rbn1/1N1P2r1/1rpQ2n1/5kPP/R2B1Pp1/Kp6/2Np4/3Bq3

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Se3#
    • 1...Qxd1
      • 2.Se3#
    • 1...Qf1
      • 2.Se3#
    • 1...Qh1
      • 2.Se3#
    • 1...Qe3
      • 2.Sxe3#
  • Tries
    • 1.dxc8Q+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Rd7!
  • Keys
    • 1.Be3!
      • threat
        • 2.Sd4#
      • 1...Bxd6+
        • 2.Sxd6#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Sxf4
        • 2.Re5#
      • 1...bxc2
        • 2.Bxc2#
      • 1...Rb4
        • 2.Qe6#
      • 1...Re7
        • 2.Qxg6#
      • 1...Be7
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Se5
        • 2.Rxe5#
      • 1...S6e7
        • 2.Qe5#
      • 1...S8e7
        • 2.Qf6#
      • 1...c5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::S(B)
    • Q(a);N_GUARD,XB(A)::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
  • Tries
    • Try
      • P(K);CHECK,XB(j)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(K),XQ(a)
      • Refutation
        • R(i);P_SPINR(i)
  • Actual
    • B(E);
    • Threat
      • S(B)
    • Vars
      • B(k);CHECK,XQ(I)::S(J),XB(k)
      • Q(a);XB(E)::S(B),XQ(a)
      • S(h);N_GUARD,XP(F)::R1(L)
      • P(c);OGATE,XS(B)::B(A),XP(c)
      • R(f);N_PINQ(I)::QAB1(I)
      • R(i);N_PINQ(I)::QAB1(I),XS(h)
      • B(k);S_CUTR(i)::PXB(j)=Q
      • S(h);N_GUARD::R1(L),XS(h)
      • S(h);N_PINQ(I)::QAR1(I)
      • S(l);N_PINQ(I)::QAR1(I)
      • P(g);N_PINQ(I)::QAB(I)
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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).