MESON Chess Problem Database

Problem Display
PID: 218527 (8/7N/1K6/2P1kp2/4B3/5P2/1N3P2/Q7 w - - 0 1)

Sellman, Alexander G

Baltimore American and Commercial Advertiser, 1881

8/7N/1K6/2P1kp2/4B3/5P2/1N3P2/Q7

#2

8 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sd3#
  • Tries
    • 1.Sc4+?
      • 1...Kf4
        • 2.Qe5#
        • 2.Qc1#
      • 1...Ke6!
    • 1.Qa4?
      • 1...Kf4
        • 2.Sd3#
      • 1...Ke6
        • 2.Qe8#
      • 1...fxe4
        • 2.Qxe4#
      • 1...f4!
  • Keys
    • 1.Qa8!
      • 1...Kd4
        • 2.Qh8#
      • 1...Kf4
        • 2.Sd3#
        • 2.Qb8#
      • 1...Ke6
        • 2.Qe8#
      • 1...fxe4
        • 2.Qxe4#
      • 1...f4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::S(B)
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);OGATE,XB(E)::QAR1(A),XP(b)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);OGATE,XB(E)::QAR1(A),XP(b)
      • P(b);SBLOCK::QAR1(A)
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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).