MESON Chess Problem Database

Problem Display
PID: 219184 (4b1QB/2R1Rn1K/3p4/p2k4/5P2/1n1N3p/B1Nbp3/1q6 w - - 0 1)

Coello Alonso, Jose Antonio

Uris, Miguel

BCPS Website, 2020

4b1QB/2R1Rn1K/3p4/p2k4/5P2/1n1N3p/B1Nbp3/1q6

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxb3#
    • 1...Qc1
      • 2.Bxb3#
    • 1...Qd1
      • 2.Bxb3#
    • 1...Qe1
      • 2.Bxb3#
    • 1...Qf1
      • 2.Bxb3#
    • 1...Qg1
      • 2.Bxb3#
    • 1...Qh1
      • 2.Bxb3#
    • 1...Be1
      • 2.Se3#
    • 1...Bc3
      • 2.Se3#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bb4
      • 2.Se3#
    • 1...Bxf4
      • 2.Sxf4#
    • 1...Ba4
      • 2.Qxf7#
    • 1...Bb5
      • 2.Qxf7#
    • 1...Bc6
      • 2.Qxf7#
    • 1...h2
      • 2.Qg2#
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qd4#
      • 1...Sg5+
        • 2.Qxg5#
      • 1...Qxa2
        • 2.Qh1#
      • 1...Qxg1
        • 2.Bxb3#
      • 1...Qa1
        • 2.Bxb3#
      • 1...Qb2
        • 2.Qh1#
      • 1...Bc3
        • 2.Se3#
      • 1...Be3
        • 2.Sxe3#

This is a version of 140673

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::B(A),XS(d)
    • B(b);N_GUARD::S(B)
    • B(b);N_GUARD::S(B),XB(b)
    • B(b);XP(D)::S(C),XB(b)
    • B(j);N_GUARD::QAB(H),XS(i)
    • P(e);N_GUARD::QAB(H)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • S(i);CHECK,N_GUARD::QAR(H),XS(i)
      • Q(a);N_GUARD,N_SPINS(d),XB(A)::QAB(H)
      • Q(a);N_GUARD,XQ(H)::B(A),XS(d)
      • Q(a);N_GUARD::B(A),XS(d)
      • Q(a);N_GUARD::QAB(H)
      • B(b);N_GUARD::S(B)
      • B(b);N_GUARD::S(B),XB(b)
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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).