MESON Chess Problem Database

Problem Display
PID: 193739 (R5Q1/3q4/PN1P4/kpB5/3NR3/1pP4p/8/n6K w - - 0 1)

Cerioli, Antonio

L'Italia Scacchistica, 1916

R5Q1/3q4/PN1P4/kpB5/3NR3/1pP4p/8/n6K

#2

10 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Sc6#
    • 1...Qf5
      • 2.Sc6#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qe6
      • 2.Sc6#
    • 1...Qb7
      • 2.axb7#
    • 1...Qe7
      • 2.Sc6#
    • 1...Qf7
      • 2.Sc6#
    • 1...Qg7
      • 2.Sc6#
    • 1...Qh7
      • 2.Sc6#
    • 1...Qd8
      • 2.Sc6#
    • 1...Sc2
      • 2.Sxb3#
    • 1...b2
      • 2.Qa2#
    • 1...b4
      • 2.cxb4#
  • Tries
    • 1.Qxb3?
      • threat
        • 2.Qa2#
        • 2.Qa3#
        • 2.Qb4#
      • 1...Sxb3
        • 2.Sxb3#
      • 1...Qa7
        • 2.Qa2#
        • 2.Qa3#
        • 2.Qxb5#
      • 1...Qe6
        • 2.Sc6#
        • 2.Qa3#
        • 2.Qb4#
        • 2.Qxb5#
      • 1...Qf7
        • 2.Sc6#
        • 2.Qa3#
        • 2.Qb4#
        • 2.Qxb5#
      • 1...b4
        • 2.Sc4#
        • 2.Qxb4#
        • 2.cxb4#
      • 1...Sc2!
    • 1.Qc4?
      • threat
        • 2.Qb4#
      • 1...Qa7
        • 2.Qxb5#
      • 1...Sc2
        • 2.Sxb3#
      • 1...b4
        • 2.Qxb4#
        • 2.cxb4#
      • 1...bxc4!
    • 1.Qg1?
      • threat
        • 2.Qxa1#
      • 1...Sc2
        • 2.Sxb3#
      • 1...b4
        • 2.cxb4#
      • 1...b2!
  • Keys
    • 1.Re1!
      • threat
        • 2.Rxa1#
      • 1...Qc6+
        • 2.Sxc6#
      • 1...Qb7+
        • 2.axb7#
      • 1...Sc2
        • 2.Sxb3#
      • 1...b2
        • 2.Qa2#
      • 1...b4
        • 2.cxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(f);N_GUARD::S(C)
    • Q(f);N_GUARD,P_PINR(D)::S(C),XQ(f)
    • Q(f);OGATE,P_PINR(D)::R(I)+P(F),XQ(f)
    • S(a);N_GUARD::S(C),XP(b)
    • P(b);OGATE::QAR(J)
    • P(e);OGATE::P(B),XP(e)
  • Tries
    • Try
      • Q(J);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • S(a);XQ(J)::S(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • Q(f);N_GUARD::QAR1(J),XP(e)
        • S(a);N_GUARD::S(C),XP(b)
      • Refutation
        • P(e);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAR(J),XS(a)
      • Vars
        • S(a);N_GUARD::S(C),XP(b)
        • P(e);OGATE::P(B),XP(e)
      • Refutation
        • P(b);
  • Actual
    • R(D);
    • Threat
      • R(D),XS(a)
    • Vars
      • Q(f);CHECK,N_GUARD::S(C),XQ(f)
      • Q(f);CHECK,OGATE::R(I)+P(F),XQ(f)
      • S(a);N_GUARD::S(C),XP(b)
      • P(b);OGATE::QAR(J)
      • P(e);OGATE::P(B),XP(e)
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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).