MESON Chess Problem Database

Problem Display
PID: 110016 (2b2K2/4p2B/5k2/3Q4/7P/8/8/8 w - - 0 1)

Restad, Birger

Il Littorale, 1929-1931

2b2K2/4p2B/5k2/3Q4/7P/8/8/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qxf5#
    • 1...Ba6
      • 2.Qf5#
    • 1...Be6
      • 2.Qd4#
      • 2.Qg5#
    • 1...Bb7
      • 2.Qf5#
    • 1...e5
      • 2.Qf7#
    • 1...e6
      • 2.Qg5#
  • Tries
    • 1.Bg8?
      • threat
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...e5
        • 2.Qf7#
      • 1...Bf5!
    • 1.Qc5?
      • threat
        • 2.Qxe7#
      • 1...Be6
        • 2.Qd4#
        • 2.Qc3#
        • 2.Qg5#
      • 1...e5
        • 2.Qe7#
      • 1...e6
        • 2.Qg5#
      • 1...Ke6!
    • 1.Qd6+?
      • 1...Be6
        • 2.Qd4#
      • 1...e6
        • 2.Qf4#
      • 1...exd6!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxe7#
      • 1...e5
        • 2.Qg6#
      • 1...Be6
        • 2.Qd4#
      • 1...e6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD::QAR1(B),XB(c)
    • B(c);N_GUARD::QAR1(B)
    • P(b);SBLOCK::QAR1(B)
    • P(b);SBLOCK::QAB1(B)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • P(b);::QAB1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • B(c);P_SPINB(c),SBLOCK,S_CUTP(b)::QAB(B)
        • P(b);P_SPINP(b),SBLOCK,S_CUTB(c)::QAR2(B)
      • Refutation
        • P(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(b)
    • Vars
      • P(b);SBLOCK::QAR1(B)
      • B(c);SBLOCK,S_CUTP(b)::QAB(B)
      • P(b);SBLOCK,S_CUTB(c)::QAR2(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).