MESON Chess Problem Database

Problem Display
PID: 100956 (3R4/2p5/Bp6/1r4QK/bPk1p2p/2n1n2r/1RpPp3/6B1 w - - 0 1)

Fontana, Alessandro

Good Companions, 1920

3R4/2p5/Bp6/1r4QK/bPk1p2p/2n1n2r/1RpPp3/6B1

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Rd4#
    • 1...Sf1
      • 2.Rd4#
    • 1...Sg2
      • 2.Rd4#
    • 1...Sg4
      • 2.Rd4#
  • Keys
    • 1.Qe5!
      • threat
        • 2.Rd4#
      • 1...Scd5
        • 2.Qxe4#
      • 1...Sed5
        • 2.Qd4#
      • 1...Sf5
        • 2.Qxc7#
      • 1...c5
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(d);::R1(H)
  • Actual
    • Q(E);
    • Threat
      • R1(H)
    • Vars
      • S(c);N_PINQ(E)::QAR2(E),XP(h)
      • S(d);N_PINQ(E)::QAR1(E)
      • S(d);N_PINQ(E)::QAR(E),XP(l)
      • P(l);N_PINQ(E)::QAR1(E),XS(c)
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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).