MESON Chess Problem Database

Problem Display
PID: 9437 (b1B5/1Q6/2rPNNp1/5k2/2P5/2B1p2P/3n2K1/8 w - - 0 1)

Cauveren, Jonas Ephraim

2nd Place, Discendo Discimus, 1903

b1B5/1Q6/2rPNNp1/5k2/2P5/2B1p2P/3n2K1/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qxb1#
    • 1...Sf1
      • 2.Qb1#
    • 1...Sf3
      • 2.Qb1#
    • 1...Sxc4
      • 2.Qb1#
    • 1...g5
      • 2.Qh7#
  • Tries
    • 1.Qb1+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxb1!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Sc5#
      • 1...Rxc8
        • 2.Shg7#
      • 1...gxh5
        • 2.Qh7#
      • 1...g5
        • 2.Qh7#
      • 1...Sf1
        • 2.Qb1#
      • 1...Se4
        • 2.Shg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAB(H),XS(a)
    • S(a);N_GUARD::QAB(H)
    • S(a);N_GUARD,XP(D)::QAB(H)
    • P(e);OGATEB::QAB(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(H),XS(a)
      • Refutation
        • S(a);XQ(H)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(c);P_SPINR(d),S_FLIGHT::S(F)
      • R(d);P_PINQ(H),XB(I)::S(G)
      • P(e);OGATEB,XS(G)::QAB(H)
      • P(e);OGATEB::QAB(H)
      • S(a);N_GUARD::QAB(H)
      • S(a);SBLOCK::S(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).