MESON Chess Problem Database

Problem Display
PID: 71399 (K1RN1B2/bp5b/3n3p/3kn1Rr/p2p4/1r2PP2/B7/2Q5 w - - 0 1)

Castellari, Umberto

L'Italia Scacchistica, 1951

K1RN1B2/bp5b/3n3p/3kn1Rr/p2p4/1r2PP2/B7/2Q5

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Rxc5#
      • 2.Qxc5#
    • 1...Bb8
      • 2.Rc5#
      • 2.Qc5#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Se4
      • 2.Qc4#
    • 1...Sb5
      • 2.Qc4#
    • 1...Sf5
      • 2.e4#
    • 1...Sf7
      • 2.Qc4#
    • 1...Se8
      • 2.Qc4#
    • 1...b5
      • 2.Qc6#
    • 1...b6
      • 2.Qc6#
  • Tries
    • 1.Bxb3+?
      • 1...Sc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...axb3!
    • 1.Rc6?
      • threat
        • 2.Rxd6#
      • 1...bxc6
        • 2.Qxc6#
      • 1...Bc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Bb8
        • 2.Rc5#
        • 2.Qc5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Se4
        • 2.Qc4#
      • 1...Sb5
        • 2.Qc4#
      • 1...Sf5
        • 2.e4#
      • 1...Sf7
        • 2.Qc4#
      • 1...Sc8
        • 2.Qc4#
      • 1...Se8
        • 2.Qc4#
      • 1...Bc2!
    • 1.e4+?
      • 1...Sxe4
        • 2.Qc4#
      • 1...Bxe4!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxd6#
      • 1...Sxc8
        • 2.Qf7#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb8
        • 2.Qc5#
      • 1...Sc4
        • 2.Qxc4#
        • 2.Qf7#
      • 1...Se4
        • 2.Qxe5#
        • 2.Qc4#
        • 2.Qxb7#
        • 2.Qf7#
      • 1...Sb5
        • 2.Qxe5#
        • 2.Qc4#
        • 2.Qxb7#
        • 2.Qf7#
      • 1...Sf5
        • 2.e4#
      • 1...Sf7
        • 2.Qc4#
        • 2.Qxb7#
        • 2.Qxf7#
      • 1...Se8
        • 2.Qxe5#
        • 2.Qc4#
        • 2.Qxb7#
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(g);N_GUARD,N_SPINR(a)::QAB1(A),XS(g)
    • S(g);N_GUARD::QAB1(A)
    • S(g);N_GUARD,N_SPINS(e),S_CUTB(k)::P(C)
    • P(j);N_GUARD::QAB1(A)
  • Tries
    • Try
      • B(B);CHECK,XR(a)
      • Refutation
        • P(b);XB(B)
    • Try
      • R(G);
      • Threat
        • R1(G),XS(g)
      • Vars
        • P(j);OGATE,XR(G)::QAB1(A),XP(j)
        • S(g);N_GUARD,N_SPINR(a)::QAB1(A),XS(g)
        • S(g);N_GUARD::QAB1(A)
        • S(g);N_GUARD,N_SPINS(e),S_CUTB(k)::P(C)
      • Refutation
        • B(k);
    • Try
      • P(C);CHECK
      • Vars
        • S(g);XP(C)::QAB1(A)
      • Refutation
        • B(k);XP(C)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XS(g)
    • Vars
      • S(g);N_GUARD,XR(G)::QAB(A)
      • B(i);N_GUARD::QAR1(A),XB(i)
      • B(i);N_GUARD::QAR1(A)
      • S(g);N_GUARD,N_SPINS(e),S_CUTB(k)::P(C)
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).