MESON Chess Problem Database

Problem Display
PID: 174014 (Q7/8/8/K5B1/4N3/2R3R1/3pkp2/4b2N w - - 0 1)

Bottacchi, Antonio

L'Italia Scacchistica, 1920

Q7/8/8/K5B1/4N3/2R3R1/3pkp2/4b2N

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qa6#
    • 1...d1S
      • 2.Qa6#
    • 1...d1B
      • 2.Qa6#
  • Tries
    • 1.Rc2?
      • 1...Kf1
        • 2.Qa6#
      • 1...f1Q
        • 2.Sc3#
      • 1...f1S
        • 2.Sc3#
      • 1...f1B
        • 2.Sc3#
      • 1...f1R
        • 2.Sc3#
      • 1...Kd1!
    • 1.Rce3+?
      • 1...Kf1
        • 2.Qa6#
      • 1...Kd1!
    • 1.Rg2?
      • 1...Kf1
        • 2.Seg3#
      • 1...d1Q
        • 2.Shg3#
        • 2.Seg3#
      • 1...d1S
        • 2.Shg3#
        • 2.Seg3#
        • 2.Qa6#
      • 1...d1B
        • 2.Shg3#
        • 2.Seg3#
        • 2.Qa6#
      • 1...d1R
        • 2.Shg3#
        • 2.Seg3#
      • 1...Kd1!
  • Keys
    • 1.Qe8!
      • 1...Kd1
        • 2.Qh5#
      • 1...Kf1
        • 2.Qb5#
      • 1...d1Q
        • 2.Sd2#
      • 1...d1S
        • 2.Qb5#
      • 1...d1B
        • 2.Sd2#
        • 2.Qb5#
      • 1...d1R
        • 2.Sd2#
      • 1...f1Q
        • 2.Sef2#
      • 1...f1S
        • 2.Qh5#
      • 1...f1B
        • 2.Sef2#
        • 2.Qh5#
      • 1...f1R
        • 2.Sef2#

This is a version

Version by Oscar Bonivento.

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::QAB(G)
    • P(b);P_PINR(B),SBLOCK::QAB(G)
  • Tries
    • Try
      • R(B);P_PINP(b)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB(G)
        • P(d);SBLOCK::S(D)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);P_PINP(d)
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT::S(D)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(c);S_FLIGHT::QAB(G)
      • P(b);P_PINR(B),SBLOCK::QAR(G)+S(D)
      • P(b);P_PINR(B),SBLOCK::QAB(G)
      • P(d);SBLOCK::QAR(G)+S(D)
      • P(d);SBLOCK::QAB(G)
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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).