MESON Chess Problem Database

Problem Display
PID: 95817 (3RR2q/2Q2b2/8/8/N1p1p2p/8/1P1P1bN1/1KBk1B2 w - - 0 1)

Paros, Gyorgy

L'Italia Scacchistica, 1933

3RR2q/2Q2b2/8/8/N1p1p2p/8/1P1P1bN1/1KBk1B2

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2+
      • 2.Sxb2#
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qh5
      • 2.Sc3#
    • 1...Qh6
      • 2.Sc3#
    • 1...Qh7
      • 2.Sc3#
    • 1...Qxe8
      • 2.Sc3#
    • 1...Qf8
      • 2.Sc3#
    • 1...Qg8
      • 2.Sc3#
    • 1...Be1
      • 2.Se3#
  • Tries
    • 1.Rxh8?
      • threat
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
      • 1...Bd4!
    • 1.Qxc4?
      • threat
        • 2.Be2#
        • 2.Qe2#
        • 2.Qc2#
      • 1...Qxb2+
        • 2.Sxb2#
      • 1...Qc3
        • 2.Sxc3#
        • 2.Be2#
        • 2.Qe2#
      • 1...Qh5
        • 2.Sc3#
        • 2.Qc2#
      • 1...Bh5
        • 2.Qb3#
        • 2.Qc2#
      • 1...Bxc4!
  • Keys
    • 1.d4!
      • threat
        • 2.Sc3#
      • 1...cxd4 ep
        • 2.Qc2#
      • 1...exd4 ep
        • 2.Be2#
      • 1...Be1
        • 2.Se3#
      • 1...c3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(g);CHECK,XP(D)::S(G),XQ(g)
    • Q(g);N_GUARD::S(G),XQ(g)
    • Q(g);N_GUARD::S(G)
    • Q(g);N_GUARD,XR(J)::S(G)
    • B(b);N_GUARD,SBLOCK::S(F)
  • Tries
    • Try
      • R(J);XQ(g)
      • Threat
        • S(G)
      • Vars
        • P(c);::S(G),XP(c)
      • Refutation
        • B(b);
    • Try
      • Q(H);XP(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);CHECK,XP(D)::S(G),XQ(g)
      • Refutation
        • B(f);XQ(H)
  • Actual
    • P(E);
    • Threat
      • S(G)
    • Vars
      • P(c);EP,OGATE,P_SPINP(c),XP(E)::QAB1(H)
      • P(d);EP,P_SPINP(d),XP(E)::B(C)
      • B(b);N_GUARD,SBLOCK::S(F)
      • P(c);::S(G),XP(c)
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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).