MESON Chess Problem Database

Problem Display
PID: 169865 (2r2B2/2rq4/1Q4p1/1bn1p3/2Pk1pB1/8/3NK3/2R5 w - - 0 1)

Calvo, Gonzalo

SEPA, 1945

2r2B2/2rq4/1Q4p1/1bn1p3/2Pk1pB1/8/3NK3/2R5

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qd6#
    • 1...Qe8
      • 2.Qd6#
    • 1...Qd6
      • 2.Qxd6#
    • 1...Qg7
      • 2.Qd6#
    • 1...Qh7
      • 2.Qd6#
    • 1...Ba4
      • 2.Qb2#
    • 1...Ba6
      • 2.Qb2#
    • 1...Bc6
      • 2.Bxc5#
      • 2.Qxc5#
      • 2.Qb2#
    • 1...e4
      • 2.Qf6#
  • Keys
    • 1.Bf3!
      • threat
        • 2.Sb3#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...e4
        • 2.Qf6#
      • 1...Ba4
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD::QAR2(F)
    • Q(h);N_GUARD::QAR2(F),XQ(h)
    • B(c);N_PINP(D),OGATE::QAB(F)
    • B(c);OGATE::QAB(F)
    • P(e);OGATEB::QAB(F)
  • Actual
    • B(E);
    • Threat
      • S(B)
    • Vars
      • B(c);CHECK,OGATE,XP(D)::R1(A),XB(c)
      • P(e);OGATEB::QAB(F)
      • B(c);N_PINP(D),OGATE::QAB(F)
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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).