MESON Chess Problem Database

Problem Display
PID: 121356 (8/2Q5/6Pq/7P/3P2P1/1R2Pk1P/5N2/2b2K2 w - - 0 1)

Ferber, Eugene

Sakkvilag, 1912

8/2Q5/6Pq/7P/3P2P1/1R2Pk1P/5N2/2b2K2

#2

10 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qg7
      • 2.Qf4#
    • 1...Qxh5
      • 2.Qf4#
    • 1...Qxg6
      • 2.Qf4#
    • 1...Qh7
      • 2.Qf4#
    • 1...Qh8
      • 2.Qf4#
  • Tries
    • 1.Qf7+?
      • 1...Qf4
        • 2.Qxf4#
      • 1...Kg3!
  • Keys
    • 1.Se4!
      • 1...Kxe4
        • 2.Qc6#
        • 2.Qb7#
      • 1...Qxe3
        • 2.Sg5#
      • 1...Qxh5
        • 2.Qf4#
      • 1...Qxg6
        • 2.Qf4#
      • 1...Bxe3
        • 2.Sd2#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qg5
        • 2.Sxg5#
      • 1...Qg7
        • 2.Sg5#
        • 2.Qf4#
      • 1...Qf8
        • 2.Sg5#
      • 1...Qh7
        • 2.Sg5#
        • 2.Qf4#
      • 1...Qh8
        • 2.Sg5#
        • 2.Qf4#
      • 1...Bb2
        • 2.Sd2#
      • 1...Bd2
        • 2.Sxd2#
      • 1...Ba3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::QAR1(J),XQ(c)
    • Q(c);N_GUARD::QAR1(J)
    • Q(c);N_GUARD,XP(H)::QAR1(J)
    • Q(c);N_GUARD,XP(I)::QAR1(J)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR1(J),XQ(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(B);
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XP(D)::S(B)
      • Q(c);N_GUARD,XP(H)::QAR1(J)
      • Q(c);N_GUARD,XP(I)::QAR1(J)
      • B(a);N_GUARD,P_SPINB(a),XP(D)::S(B)
      • Q(c);N_GUARD::QAR1(J),XQ(c)
      • Q(c);N_GUARD::S(B),XQ(c)
      • Q(c);N_GUARD::S(B)
      • B(a);N_GUARD::S(B)
      • B(a);N_GUARD::S(B),XB(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).