MESON Chess Problem Database

Problem Display
PID: 194092 (1bQ5/7R/N2p4/kb1n4/P7/4B3/1P6/R6K w - - 0 1)

Trcala, Stanislav

Casopis ceskoslovenskych sachistu, 1917

1bQ5/7R/N2p4/kb1n4/P7/4B3/1P6/R6K

#2

8 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.b4#
    • 1...Sf4
      • 2.b4#
    • 1...Sb6
      • 2.Bd2#
      • 2.b4#
    • 1...Sf6
      • 2.b4#
    • 1...Sc7
      • 2.b4#
    • 1...Se7
      • 2.b4#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qxb5#
        • 2.axb5#
      • 1...Kxa6
        • 2.Qxb5#
        • 2.axb5#
      • 1...Sc3
        • 2.Qb6#
      • 1...Sb4
        • 2.Qb6#
        • 2.Qxb5#
      • 1...Sb6
        • 2.Qxb6#
        • 2.Qxb5#
      • 1...Sc7
        • 2.Qb6#
        • 2.axb5#
      • 1...dxc5!
  • Keys
    • 1.Bb6+!
      • 1...Kxb6
        • 2.a5#
      • 1...Sxb6
        • 2.b4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(c);N_GUARD::P(C)
  • Tries
    • Try
      • Q(H);P_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::QAB1(H)
      • Refutation
        • P(d);N_SPINB(b),XQ(H)
  • Actual
    • B(D);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT,XB(D)::P(E)
      • S(c);SBLOCK,XB(D)::P(C)
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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).