MESON Chess Problem Database

Problem Display
PID: 83721 (2B4K/8/2kp3p/Bp5R/2N4r/1Nn5/1Q6/b1R5 w - - 0 1)

Ellerman, Arnoldo

Xadrez Brasileiro, 1936

2B4K/8/2kp3p/Bp5R/2N4r/1Nn5/1Q6/b1R5

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sd4#
    • 1...Rh2
      • 2.Sd4#
    • 1...Rh3
      • 2.Sd4#
    • 1...Rd4
      • 2.Sxd4#
    • 1...Se4
      • 2.Sd4#
    • 1...Sd5
      • 2.Se5#
  • Keys
    • 1.Qg2+!
      • 1...Re4
        • 2.Sd4#
      • 1...Se4+
        • 2.Sb2#
      • 1...Sd5+
        • 2.Se5#
      • 1...d5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::S(C)
    • R(c);N_GUARD::S(C),XR(c)
    • S(b);P_PINQ(B),S_CUTR(c)::S(C)
    • S(b);P_PINQ(B),SBLOCK::R(A)+S(D),DCHECK
  • Actual
    • Q(B);CHECK
    • Vars
      • R(c);P_SPINR(c)::S(C)
      • S(b);CHECK,P_SPINS(b),S_CUTP(f),S_CUTR(c)::R(A)+S(D)
      • S(b);CHECK,P_SPINS(b)::R(A)+S(D),DCHECK
      • P(f);OGATEB,P_SPINP(f)::QAR(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).