MESON Chess Problem Database

Problem Display
PID: 202293 (5Q2/1p6/1r2p3/r3k1Pp/1P1pp3/4N3/1BP4K/8 w - - 0 1)

ten Cate, Pieter

L'Alfiere di Re, 1923

5Q2/1p6/1r2p3/r3k1Pp/1P1pp3/4N3/1BP4K/8

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sc4#
    • 1...Rxb4
      • 2.Qb8#
    • 1...Rb5
      • 2.Qb8#
    • 1...Rd6
      • 2.Qf6#
  • Keys
    • 1.c3!
      • threat
        • 2.cxd4#
      • 1...Rxb4
        • 2.Qb8#
      • 1...dxc3
        • 2.Bxc3#
      • 1...dxe3
        • 2.c4#
      • 1...Rd5
        • 2.Sc4#
      • 1...Rd6
        • 2.Qf6#
      • 1...d3
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK::S(D)
    • R(f);N_GUARD,XP(E)::QAB(G)
    • R(f);N_GUARD::QAB(G)
    • R(f);SBLOCK::QAB1(G)
  • Actual
    • P(B);N_PINP(a)
    • Threat
      • P(B),XP(a)
    • Vars
      • R(f);N_GUARD,XP(E)::QAB(G)
      • P(a);OGATE,P_SPINP(a),XP(B)::B(A),XP(a)
      • P(a);XS(D)::B(A)+P(B)
      • R(c);SBLOCK::S(D)
      • R(f);SBLOCK::QAB1(G)
      • P(a);::B(A)+P(B)
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).