MESON Chess Problem Database

Problem Display
PID: 250204 (1qr5/4N2p/5p2/2PpP2Q/3k1n2/1pR2PN1/1P3b1B/2nK4 w - - 0 1)

Leblank, G

De Maasbode, 1927

1qr5/4N2p/5p2/2PpP2Q/3k1n2/1pR2PN1/1P3b1B/2nK4

#2

10 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rd8
      • 2.Sc6#
    • 1...Re8
      • 2.Sc6#
    • 1...Rf8
      • 2.Sc6#
    • 1...Rg8
      • 2.Sc6#
    • 1...Rh8
      • 2.Sc6#
    • 1...Bg1
      • 2.Bxg1#
    • 1...Se2
      • 2.Sgf5#
    • 1...Sg2
      • 2.Sgf5#
    • 1...Sd3
      • 2.Sgf5#
    • 1...Sh3
      • 2.Sgf5#
    • 1...Sxh5
      • 2.Sgf5#
    • 1...Se6
      • 2.Sgf5#
    • 1...Sg6
      • 2.Sgf5#
    • 1...fxe5
      • 2.Sgf5#
      • 2.Sef5#
  • Tries
    • 1.Se2+?
      • 1...Sfxe2
        • 2.Sf5#
      • 1...Scxe2!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Sef5#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Qxe5
        • 2.Qa4#
      • 1...Rxe8
        • 2.Sc6#
      • 1...Se6
        • 2.Sgf5#
      • 1...f5
        • 2.Sexf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • R(j);N_GUARD::S(J),XR(j)
    • R(j);N_GUARD::S(J)
    • B(b);OGATEB::B(C),XB(b)
    • S(e);::S(F)
    • S(e);XQ(I)::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(e);XS(F)::S(J)
      • Refutation
        • S(a);XS(F)
  • Actual
    • Q(I);
    • Threat
      • S(J)
    • Vars
      • K(d);S_FLIGHT,XP(H)::QAR(I)+S(J),DCHECK
      • Q(i);N_GUARD,SBLOCK,XP(H)::QAR(I)
      • R(j);N_GUARD,XQ(I)::S(J)
      • S(e);::S(F)
      • P(g);::S(J),XP(g)
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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).