MESON Chess Problem Database

Problem Display
PID: 222511 (2bbB3/B1nP1rn1/2k5/2N1p3/2p1Kp2/8/8/1r1Q4 w - - 0 1)

Blankenburg, Rudolph

Philadelphia Times, 1884

2bbB3/B1nP1rn1/2k5/2N1p3/2p1Kp2/8/8/1r1Q4

#2

6 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qa4#
    • 1...Bh4
      • 2.d8S#
    • 1...Bg5
      • 2.d8S#
    • 1...Bf6
      • 2.d8S#
    • 1...Be7
      • 2.d8S#
    • 1...Sb5
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Sa6
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Sce6
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Sa8
      • 2.dxc8Q#
      • 2.dxc8R#
  • Tries
    • 1.dxc8Q+?
      • 1...Rd7
        • 2.Bxd7#
        • 2.Qcxd7#
        • 2.Qdxd7#
      • 1...Sxe8!
    • 1.dxc8R+?
      • 1...Rd7
        • 2.Bxd7#
        • 2.Qxd7#
      • 1...Sxe8!
  • Keys
    • 1.Qd6+!
      • 1...Kb5
        • 2.Qb6#
      • 1...Kxd6
        • 2.dxc8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(e);S_FLIGHT::QAB1(A)
    • B(j);OGATE::P=S
    • S(f);SBLOCK::PXB(i)=Q
    • S(f);::PXB(i)=Q
  • Tries
    • Try
      • P(E);CHECK,P_PINS(f),XB(i)
      • Refutation
        • S(h);XB(F)
    • Try
      • P(E);CHECK,P_PINS(f),XB(i)
      • Refutation
        • S(h);XB(F)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(e);OGATE,S_FLIGHT::QAR1(A)
      • K(e);P-FLIGHT,XQ(A)::PXB(i)=S
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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).