MESON Chess Problem Database

Problem Display
PID: 103758 (4K3/8/2ppk3/8/1Q1P4/6N1/8/B7 w - - 0 1)

Schwann, Edward B

Montreal Gazette, 1897

4K3/8/2ppk3/8/1Q1P4/6N1/8/B7

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qb3#
    • 1...d5
      • 2.Qe7#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qf5#
      • 1...Kd5
        • 2.Qa2#
        • 2.Qb3#
      • 1...d5
        • 2.Qg6#
      • 1...Kf6!
    • 1.Qc4+?
      • 1...d5
        • 2.Qxc6#
      • 1...Kf6!
    • 1.Qb7?
      • threat
        • 2.Qf7#
      • 1...Kd5
        • 2.Qb3#
        • 2.Qf7#
      • 1...d5
        • 2.Qxc6#
        • 2.Qe7#
      • 1...Kf6!
    • 1.d5+?
      • 1...cxd5
        • 2.Qe1#
        • 2.Qg4#
      • 1...Kxd5!
  • Keys
    • 1.Qd2!
      • 1...Kd5
        • 2.Qa2#
      • 1...Kf6
        • 2.Qh6#
      • 1...c5
        • 2.d5#
      • 1...d5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(C)
    • P(b);OGATE,SBLOCK::QAR1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAR2(C),XP(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(D);CHECK
      • Refutation
        • K(c);S_FLIGHT,XP(D)
  • Actual
    • Q(C);
    • Vars
      • K(c);S_FLIGHT::QAB(C)
      • K(c);P-FLIGHT::QAR2(C)
      • P(a);N_GUARD::P(D)
      • P(b);SBLOCK::QAR(C)
HTML5 logo

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).