MESON Chess Problem Database

Problem Display
PID: 202405 (6n1/4p3/2PNk2p/Q2R3N/1K3B2/5p1p/6bp/3B2qr w - - 0 1)

Tosco, Giovanni

L'Alfiere di Re, 1923

6n1/4p3/2PNk2p/Q2R3N/1K3B2/5p1p/6bp/3B2qr

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Sg7#
    • 1...f2
      • 2.Bg4#
  • Keys
    • 1.Qa2!
      • threat
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rf5#
        • 2.Rg5#
      • 1...Qd4+
        • 2.Rxd4#
      • 1...Qc5+
        • 2.Rxc5#
      • 1...Qb6+
        • 2.Rb5#
      • 1...Qe1+
        • 2.Rd2#
      • 1...Qxd1
        • 2.Rxd1#
      • 1...exd6
        • 2.Re5#
      • 1...Qf2
        • 2.Rd2#
      • 1...Qe3
        • 2.Rd3#
      • 1...Qa7
        • 2.Ra5#
      • 1...Qf1
        • 2.Rd3#
      • 1...Bf1
        • 2.Rd3#
      • 1...Sf6
        • 2.Sg7#
      • 1...f2
        • 2.Bg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • S(j);SBLOCK::S(F)
    • P(e);OGATE::B(A)
  • Actual
    • Q(D);
    • Threat
      • DUALS(8)
    • Vars
      • Q(a);CHECK::QAB(D)+R(E),XQ(a)
      • Q(a);CHECK::QAB(D)+R(E)
      • Q(a);OGATE,XB(A)::QAB(D)+R(E),XQ(a)
      • P(i);SBLOCK,XS(H)::QAB(D)+R(E),DCHECK
      • Q(a);::QAB(D)+R(E)
      • B(c);::QAB(D)+R(E)
      • S(j);SBLOCK::S(F)
      • P(e);OGATE::B(A)
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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).