MESON Chess Problem Database

Problem Display
PID: 232267 (3Q4/3Rp2k/2p5/5N1K/1brp4/2q2p2/b7/8 w - - 0 1)

Palkoska, Emil

Tidskrift for Schack, 1913

3Q4/3Rp2k/2p5/5N1K/1brp4/2q2p2/b7/8

#2

4 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Rxe7#
    • 1...c5
      • 2.Rxe7#
  • Tries
    • 1.Qxe7+?
      • 1...Kg8
        • 2.Rd8#
        • 2.Qg7#
      • 1...Kh8
        • 2.Rd8#
        • 2.Qg7#
        • 2.Qh7#
      • 1...Bxe7!
  • Keys
    • 1.Sxe7!
      • threat
        • 2.Qg8#
      • 1...Rc5+
        • 2.Sd5#
      • 1...Kg7
        • 2.Sf5#
      • 1...Bxe7
        • 2.Rxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::R(C),XP(h)
    • P(g);S_CUTB(d)::R(C),XP(h)
  • Tries
    • Try
      • Q(D);CHECK,XP(h)
      • Refutation
        • B(d);P_SPINB(d),XQ(D)
  • Actual
    • S(A);XP(h)
    • Threat
      • QAB1(D)
    • Vars
      • R(e);CHECK,S_CUTB(d)::R(C)+S(A)
      • K(i);P-FLIGHT::R(C)+S(A),DCHECK
      • B(d);OGATE,P_SPINB(d),XS(A)::R(C),XB(d)
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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).