MESON Chess Problem Database

Problem Display
PID: 80573 (3R4/4B3/2p1p1q1/2NPk1pn/b3NnB1/K3P3/2P2P1Q/8 w - - 0 1)

Keller, Michael

2nd Prize, L'Italia Scacchistica, 2002

3R4/4B3/2p1p1q1/2NPk1pn/b3NnB1/K3P3/2P2P1Q/8

#2

11 + 8

23 Die Schwalbe 2008

SOLUTION

  • SOUND
  • Sets
    • 1...cxd5
      • 2.Bd6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sf3#
        • 2.Sc4#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qxc2
        • 2.Sf3#
      • 1...cxd5
        • 2.Sf3#
      • 1...exd5
        • 2.Sf3#
        • 2.Sd7#
      • 1...Bb3
        • 2.Sf3#
      • 1...Bb5
        • 2.Sf3#
      • 1...Qe4!
    • 1.Sc3?
      • threat
        • 2.Sd7#
      • 1...Qe8
        • 2.Sd3#
      • 1...Sf6
        • 2.Bd6#
      • 1...cxd5!
    • 1.Sxg5?
      • threat
        • 2.Sf3#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qe4
        • 2.Sf7#
      • 1...Qxg5!
    • 1.Bxe6?
      • threat
        • 2.Bd6#
      • 1...Qxe4
        • 2.Sd7#
      • 1...Qxe6!
    • 1.c4?
      • threat
        • 2.Bd6#
      • 1...Qxe4
        • 2.Sd7#
      • 1...exd5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qa1#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Sxd5
        • 2.Sd3#
        • 2.Sd7#
        • 2.Bd6#
      • 1...cxd5
        • 2.Bd6#
      • 1...exd5
        • 2.Sd7#
      • 1...Se2
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(f);SBLOCK,XP(I)::B(J)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,N_GUARD::S(H),XQ(h)
        • Q(h);XP(A)::S(F)
        • P(f);XP(I)::S(F)
        • B(a);::S(F)
      • Refutation
        • Q(h);
    • Try
      • S(F);
      • Threat
        • S(H)
      • Vars
        • Q(h);N_GUARD::S(H)
        • S(e);SBLOCK::B(J)
      • Refutation
        • P(f);XP(I)
    • Try
      • S(F);XP(d)
      • Threat
        • S(F)
      • Vars
        • Q(h);CHECK,N_GUARD::S(H),XQ(h)
        • Q(h);N_GUARD::S(F)
      • Refutation
        • Q(h);XS(F)
    • Try
      • B(G);XP(g)
      • Threat
        • B(J)
      • Vars
        • Q(h);SBLOCK,XS(F)::S(H)
      • Refutation
        • Q(h);XB(G)
    • Try
      • P(A);
      • Threat
        • B(J)
      • Vars
        • Q(h);SBLOCK,XS(F)::S(H)
      • Refutation
        • P(g);XP(I)
  • Actual
    • Q(C);N_PINS(b)
    • Threat
      • QAB(C)
    • Vars
      • Q(h);OGATE,XS(F)::QAR1(C),XQ(h)
      • P(f);SBLOCK,XP(I)::B(J)
      • P(g);SBLOCK,XP(I)::S(H)
      • S(b);N_GUARD::S(H)
      • S(b);N_GUARD::S(H),XS(b)
HTML5 logo

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).