MESON Chess Problem Database

Problem Display
PID: 201402 (8/pbp5/1b6/8/PPPPPPP1/pprprpp1/2N1PR1n/R3K2k w - - 0 1)

Dawson, Thomas Rayner

L'Alfiere di Re, 1922

8/pbp5/1b6/8/PPPPPPP1/pprprpp1/2N1PR1n/R3K2k

#2

12 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg4
      • 2.Kd2#
  • Keys
    • 1.Kd2+!
      • 1...Sf1+
        • 2.Raxf1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,XP(L)::R(A)+K(B)
  • Actual
    • K(B);CHECK,N_SPINP(D),S_FLIGHT
    • Vars
      • S(b);CHECK,N_GUARD,P_SPINS(b)::R(A),XS(b)
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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).