MESON Chess Problem Database

Problem Display
PID: 204402 (5Q1b/3P4/Rq2b2R/1Pnkn3/8/BPP5/3N4/7K w - - 0 1)

Somma, Francesco

L'Alfiere di Re, 1925

5Q1b/3P4/Rq2b2R/1Pnkn3/8/BPP5/3N4/7K

#2

10 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Rd6#
      • 2.Qxc5#
      • 2.Qd6#
    • 1...Qa7
      • 2.Rd6#
      • 2.Qd6#
    • 1...Qd8
      • 2.Rd6#
      • 2.Qxc5#
      • 2.Qd6#
    • 1...Qxb5
      • 2.Rd6#
      • 2.Qd6#
    • 1...Qxa6
      • 2.Qxc5#
    • 1...Qd6
      • 2.Rxd6#
      • 2.Qxd6#
    • 1...Qb7
      • 2.Rd6#
      • 2.Qxc5#
      • 2.Qd6#
    • 1...Qb8
      • 2.Qxc5#
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd4#
      • 1...Kd6
        • 2.d8Q#
      • 1...Sxb3
        • 2.Qe4#
      • 1...Sxa6
        • 2.Qe4#
      • 1...Scxd7
        • 2.Qe4#
      • 1...Sexd7
        • 2.c4#
      • 1...Scd3
        • 2.Qe4#
      • 1...Sa4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb7
        • 2.Qe4#
      • 1...Sed3
        • 2.c4#
      • 1...Sf3
        • 2.c4#
      • 1...Sc4
        • 2.bxc4#
      • 1...Sg4
        • 2.c4#
      • 1...Sc6
        • 2.c4#
      • 1...Sg6
        • 2.c4#
      • 1...Sf7
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 16
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD,XR(G)::QAR1(J),XS(a)
    • Q(d);N_GUARD::QAR1(J),XS(a)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • K(b);P-FLIGHT,P_SPINB(e),P_SPINQ(d),P_SPINS(a)::P=Q
      • S(a);N_GUARD,XP(D)::QAB1(J)
      • S(a);N_GUARD,XR(G)::QAB1(J)
      • S(a);N_GUARD,XP(I)::QAB1(J)
      • S(c);N_GUARD,XP(I)::P(E)
      • S(a);N_GUARD::QAB1(J)
      • S(a);N_GUARD::QAB1(J),XS(a)
      • S(c);N_GUARD::P(E)
      • S(c);OGATE::P(D),XS(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).