MESON Chess Problem Database

Problem Display
PID: 120780 (4q3/8/8/K3B3/4B3/b1Q5/k1n1r3/8 w - - 0 1)

Vogel, Peter

Source?, 0000

4q3/8/8/K3B3/4B3/b1Q5/k1n1r3/8

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb1
      • 2.Qa1#
    • 1...Bb2
      • 2.Qxb2#
    • 1...Bc5
      • 2.Qb2#
    • 1...Bd6
      • 2.Qb2#
    • 1...Be7
      • 2.Qb2#
    • 1...Bf8
      • 2.Qb2#
    • 1...Se1
      • 2.Qc4#
    • 1...Sb4
      • 2.Qc4#
  • Tries
    • 1.Qa1+?
      • 1...Kb3
        • 2.Bd5#
      • 1...Sxa1!
  • Keys
    • 1.Qb3+!
      • 1...Kxb3
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • K(a);P_SPINS(b),S_FLIGHT::QAR1(A)
    • B(d);N_GUARD::QAR1(A),XB(d)
    • B(d);N_GUARD::QAR1(A)
    • S(b);::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(a);S_FLIGHT,XQ(A)::B(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).