MESON Chess Problem Database

Problem Display
PID: 71555 (1N2Q1b1/1p6/5p2/2Bk1q2/5p2/2Rp1N2/5K2/8 w - - 0 1)

Segers, Marcel

2nd Prize, L'Italia Scacchistica, 1930/II

1N2Q1b1/1p6/5p2/2Bk1q2/5p2/2Rp1N2/5K2/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qd7#
    • 1...b5
      • 2.Qc6#
    • 1...b6
      • 2.Qc6#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qc4#
      • 1...Ke6
        • 2.Qd7#
      • 1...Qe4
        • 2.Qd7#
      • 1...b5!
    • 1.Qd7+?
      • 1...Ke4
        • 2.Qxd3#
        • 2.Qd4#
      • 1...Qxd7!
    • 1.Qd8+?
      • 1...Ke4
        • 2.Qxd3#
        • 2.Qd4#
      • 1...Ke6
        • 2.Qd7#
        • 2.Qxg8#
      • 1...Qd7!
    • 1.Qxg8+?
      • 1...Ke4
        • 2.Rc4#
        • 2.Qc4#
      • 1...Qe6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Ke6
        • 2.Qd7#
      • 1...Qe4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD,SBLOCK::QAR2(F)
    • P(f);N_GUARD::QAB1(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(c);S_FLIGHT::QAB1(F)
        • Q(d);N_GUARD,SBLOCK::QAR2(F)
      • Refutation
        • P(f);
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(d);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(d);P_SPINQ(d)
    • Try
      • Q(F);CHECK,XB(g)
      • Refutation
        • Q(d);P_SPINQ(d)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);S_FLIGHT::QAB1(F),XP(a)
      • K(c);S_FLIGHT::QAB1(F)
      • Q(d);N_GUARD,SBLOCK::QAR2(F)
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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).