MESON Chess Problem Database

Problem Display
PID: 271522 (4n2K/8/2p2B1p/2PN4/B5k1/1Q4N1/2rp2Pq/3b2bR w - - 0 1)

Baxter, FL

The Problemist, 1956

4n2K/8/2p2B1p/2PN4/B5k1/1Q4N1/2rp2Pq/3b2bR

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2
      • 2.Rh4#
    • 1...Qh3
      • 2.gxh3#
    • 1...Qh4
      • 2.Rxh4#
    • 1...Bf3
      • 2.Qxf3#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qf4#
      • 1...Qxg3
        • 2.Qe6#
      • 1...cxd5
        • 2.Bd7#
      • 1...Rc4
        • 2.Bxd1#
      • 1...Bxe3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qf4#
      • 1...Qxg3
        • 2.Qc8#
      • 1...cxd5
        • 2.Bd7#
      • 1...Sd6
        • 2.Qg8#
      • 1...Sc7
        • 2.Qg8#
      • 1...Rc4
        • 2.Bxd1#
      • 1...Be3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(e);OGATE,XP(B)::R1(A)
    • Q(e);OGATE::P(B),XQ(e)
    • Q(e);OGATE::R1(A),XQ(e)
    • B(a);N_GUARD::QAB1(C),XB(a)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • Q(e);SBLOCK,XS(D)::QAB(C)
        • P(g);OGATE,XS(G)::B(E)
        • R(c);OGATE::B(E),XB(a)
      • Refutation
        • B(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • Q(e);SBLOCK,XS(D)::QAB(C)
      • P(g);OGATE,XS(G)::B(E)
      • S(i);OGATE::QAR(C)
      • R(c);OGATE::B(E),XB(a)
      • B(b);N_GUARD::S(G),XB(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).