MESON Chess Problem Database

Problem Display
PID: 159697 (1n2Q3/5p2/p2KpP2/2P2N2/3BkPB1/2PpP3/5b2/8 w - - 0 1)

Paslack, Rainer

Schach, 2000

1n2Q3/5p2/p2KpP2/2P2N2/3BkPB1/2PpP3/5b2/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Sg3#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qa8#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Be5?
      • threat
        • 2.Qa4#
      • 1...Bxe3
        • 2.Sg3#
      • 1...exf5
        • 2.Bd4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qa8#
      • 1...d2!
    • 1.Qxb8?
      • threat
        • 2.Qb7#
        • 2.Qa8#
      • 1...d2
        • 2.Qb1#
      • 1...Bxe3!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Be5#
      • 1...Bxe3
        • 2.Bxe3#
      • 1...exf5
        • 2.Qe8#
      • 1...d2
        • 2.Qc2#
      • 1...Sc6
        • 2.Qxc6#
      • 1...e5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::S(G)
    • B(a);N_GUARD,P_PINP(D)::S(G),XB(a)
    • S(g);N_GUARD::QAB(J),XS(g)
    • S(g);OGATE::QAB(J)
    • P(e);OGATE::QAR1(J),XP(e)
  • Tries
    • Try
      • B(C);N_PINP(e)
      • Threat
        • QAR(J)
      • Vars
        • B(a);N_GUARD,SBLOCK,XP(B)::S(G)
        • P(e);OGATEB,XS(G)::QAR(J)+B(C)
        • S(g);N_GUARD::QAB(J),XS(g)
        • S(g);OGATE::QAB(J)
      • Refutation
        • P(b);
    • Try
      • Q(J);N_PINP(e),XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB::QAB(J)
      • Refutation
        • B(a);XP(B)
  • Actual
    • Q(J);N_PINP(e)
    • Threat
      • QAR(J)+B(C)
    • Vars
      • B(a);OGATE,XP(B)::QAR(J)+B(C),XB(a)
      • P(e);OGATEB,XS(G)::QAR(J)
      • P(b);OGATEB::QAB(J)
      • S(g);N_GUARD::QAB(J),XS(g)
      • P(e);::QAR(J)+B(C),XP(e)
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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).