MESON Chess Problem Database

Problem Display
PID: 190257 (4Q3/1b2p3/1P2N3/pp3p1K/r3k1P1/4b3/Bp1PP2B/1q3r2 w - - 0 1)

Agostini, Valerio

Best Problems, 2019

4Q3/1b2p3/1P2N3/pp3p1K/r3k1P1/4b3/Bp1PP2B/1q3r2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.d3#
    • 1...Qc1
      • 2.d3#
    • 1...Qe1
      • 2.d3#
    • 1...Rd4
      • 2.Sc5#
    • 1...Bd4
      • 2.Sg5#
    • 1...Ba6
      • 2.Qc6#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Ba8
      • 2.Qxa8#
    • 1...Bc8
      • 2.Qc6#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Qe5#
      • 1...Rf4
        • 2.Bxb1#
      • 1...Bd4
        • 2.Sg5#
      • 1...Bf4
        • 2.Qxf5#
      • 1...Bd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...f4
        • 2.Qf5#
      • 1...Bc5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qe5#
      • 1...Rf4
        • 2.Sg5#
      • 1...Bd4
        • 2.Sg5#
      • 1...Bf4
        • 2.Sc5#
      • 1...f4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::P(B)
    • R(e);SBLOCK,S_CUTB(d)::S(H)
    • B(d);N_GUARD,SBLOCK::S(H)
    • B(j);N_GUARD::QAB(I)
    • B(j);N_GUARD::QAB(I),XB(j)
    • B(j);OGATEB::QAB(I),XB(j)
  • Tries
    • Try
      • Q(I);XP(h)
      • Threat
        • QAR1(I)
      • Vars
        • R(b);N_GUARD::B(A),XQ(a)
        • B(d);N_GUARD,SBLOCK::S(H)
        • B(d);S_CUTR(b)::QAB1(I),XP(i)
        • P(i);S_CUTR(b)::QAB1(I)
      • Refutation
        • B(d);
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(b);S_CUTB(d)::S(H)
      • B(d);N_GUARD::S(H)
      • P(i);S_CUTB(d)::S(H)
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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).