MESON Chess Problem Database

Problem Display
PID: 206982 (8/8/1q1B4/5K1n/1npkP3/Q1N1ppp1/2prr3/b1N5 w - - 0 1)

Loyd, Sam

New York Saturday Press, 1859

8/8/1q1B4/5K1n/1npkP3/Q1N1ppp1/2prr3/b1N5

#2

6 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Sb5#
    • 1...Qc7
      • 2.Sb5#
    • 1...Qd8
      • 2.Sb5#
    • 1...Qb5+
      • 2.Sxb5#
    • 1...Sa2
      • 2.Be5#
    • 1...Sd5
      • 2.Be5#
    • 1...Sa6
      • 2.Be5#
  • Keys
    • 1.Qa7!
      • threat
        • 2.Sb5#
      • 1...Qc5+
        • 2.Be5#
      • 1...Sg7+
        • 2.Qxg7#
      • 1...Kxc3
        • 2.Qxa1#
      • 1...Bxc3
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(l);N_GUARD::S(C)
    • Q(l);CHECK,N_GUARD::S(C),XQ(l)
    • S(h);::B(F)
  • Actual
    • Q(B);P_PINQ(l)
    • Threat
      • S(C)
    • Vars
      • Q(l);CHECK::B(F)
      • S(k);CHECK,N_GUARD::QAB(B),XS(k)
      • K(j);N_SPINQ(l),OGATEB,S_FLIGHT,XS(C)::QAB(B),XB(a)
      • B(a);SBLOCK,XS(C)::QAB(B),XQ(l)
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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).