MESON Chess Problem Database

Problem Display
PID: 228866 (4K2n/8/4R3/1N4kp/Q4N2/p3PpBB/1r6/b2nq1R1 w - - 0 1)

Cristoffanini, Guido

L'Avvenire d'Italia, 1926

4K2n/8/4R3/1N4kp/Q4N2/p3PpBB/1r6/b2nq1R1

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Bf2#
    • 1...Qf2
      • 2.Bxf2#
    • 1...Qc3
      • 2.Bf2#
    • 1...Qb4
      • 2.Bf2#
    • 1...Qa5
      • 2.Bf2#
    • 1...Qe2
      • 2.Bf2#
    • 1...Qxe3
      • 2.Bf2#
    • 1...Rb1
      • 2.Bxe1#
    • 1...Rb3
      • 2.Bxe1#
    • 1...Rb4
      • 2.Bxe1#
    • 1...Rxb5
      • 2.Bxe1#
    • 1...Sg6
      • 2.Rxg6#
    • 1...Sf7
      • 2.Rg6#
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qd8#
      • 1...Qxa5
        • 2.Bf2#
      • 1...Rxb5
        • 2.Bxe1#
      • 1...Sg6
        • 2.Rxg6#
      • 1...Ra2
        • 2.Sc3#
      • 1...Qd2
        • 2.Bf2#
      • 1...Qc3
        • 2.Bf2#
      • 1...Qb4
        • 2.Bf2#
      • 1...Rb1
        • 2.Bxe1#
      • 1...Rc2
        • 2.Sc3#
      • 1...Rd2
        • 2.Sd4#
      • 1...Re2
        • 2.Sc3#
      • 1...Rf2
        • 2.Sc3#
      • 1...Rg2
        • 2.Sc3#
      • 1...Rh2
        • 2.Sc3#
      • 1...Rb3
        • 2.Bxe1#
      • 1...Rb4
        • 2.Bxe1#
      • 1...Sf7
        • 2.Rg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::R(A)+B(C)
    • Q(c);N_GUARD::R(A)+B(C),XQ(c)
    • Q(c);N_GUARD,P_PINR(H),XP(B)::R(A)+B(C)
    • R(d);N_GUARD::R(A)+B(C),XQ(c)
    • R(d);N_GUARD,XS(G)::R(A)+B(C),XQ(c)
    • S(i);N_GUARD::R1(H),XS(i)
    • S(i);N_GUARD::R1(H)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • Q(c);N_GUARD,XQ(E)::R(A)+B(C)
      • R(d);N_GUARD,P_SPINR(d),XS(G)::R(A)+B(C),XQ(c)
      • S(i);N_GUARD::R1(H),XS(i)
      • R(d);N_GUARD::QAR(E)+S(G)
      • Q(c);N_GUARD::R(A)+B(C)
      • R(d);N_GUARD::R(A)+B(C),XQ(c)
      • R(d);N_GUARD,S_CUTQ(c)::QAR(E)+S(G)
      • S(i);N_GUARD::R1(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).