MESON Chess Problem Database

Problem Display
PID: 197367 (5q2/1p1Q1p2/3p4/1N2kNB1/2B1P1p1/3r4/6p1/3bR1K1 w - - 0 1)

Piatesi, Antonio

The Problemist, 1981

5q2/1p1Q1p2/3p4/1N2kNB1/2B1P1p1/3r4/6p1/3bR1K1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Qxe7#
    • 1...Qg7
      • 2.Qe8#
      • 2.Qe7#
    • 1...Qa8
      • 2.Qe7#
    • 1...Qb8
      • 2.Qe7#
    • 1...Qe8
      • 2.Qxe8#
    • 1...Qg8
      • 2.Qe7#
    • 1...Qh8
      • 2.Qe7#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...f5
        • 2.Qe6#
      • 1...Qc8!
    • 1.Sfd4?
      • threat
        • 2.Qf5#
      • 1...Qc8
        • 2.Qxd6#
      • 1...f5
        • 2.Qe6#
      • 1...Rf3!
    • 1.Sfxd6?
      • threat
        • 2.Qf5#
      • 1...Qc8
        • 2.Sxf7#
      • 1...f5
        • 2.Qe6#
      • 1...Rf3!
    • 1.Se7?
      • threat
        • 2.Qf5#
      • 1...Rf3
        • 2.Qxd6#
      • 1...f5
        • 2.Sg6#
        • 2.Qe6#
      • 1...Qc8!
    • 1.Qe8+?
      • 1...Qe7
        • 2.Qxe7#
      • 1...Qxe8!
  • Keys
    • 1.Sh6!
      • threat
        • 2.Qf5#
      • 1...Rf3
        • 2.Sxg4#
      • 1...Qc8
        • 2.Sxf7#
      • 1...f5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(i);N_GUARD::QAR2(H),XQ(i)
    • Q(i);N_GUARD::QAR2(H)
    • Q(i);N_GUARD::QAR(H),XQ(i)
    • P(h);N_GUARD::QAR1(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(H)
      • Vars
        • K(e);P-FLIGHT,XP(D)::QAB1(H)
        • P(h);N_GUARD::QAR1(H)
      • Refutation
        • Q(i);
    • Try
      • S(F);
      • Threat
        • QAR1(H)
      • Vars
        • Q(i);N_GUARD::QAB1(H),XP(f)
        • P(h);N_GUARD::QAR1(H)
      • Refutation
        • R(c);
    • Try
      • S(F);XP(f)
      • Threat
        • QAR1(H)
      • Vars
        • Q(i);N_GUARD::S(F),XP(h)
        • P(h);N_GUARD::QAR1(H)
      • Refutation
        • R(c);
    • Try
      • S(F);
      • Threat
        • QAR1(H)
      • Vars
        • R(c);N_GUARD::QAB1(H),XP(f)
      • Refutation
        • Q(i);
    • Try
      • Q(H);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR2(H),XQ(i)
      • Refutation
        • Q(i);XQ(H)
  • Actual
    • S(F);
    • Threat
      • QAR1(H)
    • Vars
      • R(c);S_CUTB(a)::S(F),XP(d)
      • Q(i);N_GUARD::S(F),XP(h)
      • P(h);N_GUARD::QAR1(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).