MESON Chess Problem Database

Problem Display
PID: 206991 (8/1B1Q4/1B6/1r1qk1K1/4p3/5bp1/4RP2/3r4 w - - 0 1)

Swan, John P

Detroit Free Press, 1859

8/1B1Q4/1B6/1r1qk1K1/4p3/5bp1/4RP2/3r4

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qe7#
    • 1...Qd4
      • 2.Qe7#
    • 1...Qd6
      • 2.Qf5#
    • 1...Bh1
      • 2.f4#
    • 1...Bg2
      • 2.f4#
    • 1...Bg4
      • 2.f4#
    • 1...Bh5
      • 2.f4#
  • Keys
    • 1.Rxe4+!
      • 1...Kxe4+
        • 2.Qf5#
      • 1...Qxe4
        • 2.Qe7#
      • 1...Bxe4
        • 2.f4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD::QAR2(F)
    • Q(f);SBLOCK::QAR1(F)
    • B(b);OGATE::P(B)
  • Actual
    • R(A);CHECK,XP(d)
    • Vars
      • K(g);CHECK,P-FLIGHT,P_SPINQ(f),XR(A)::QAB1(F)
      • Q(f);XR(A)::QAR2(F)
      • B(b);OGATE,SBLOCK,XR(A)::P(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).