MESON Chess Problem Database

Problem Display
PID: 102450 (8/p7/B7/8/8/8/1K1kpQ2/3b4 w - - 0 1)

Sebillotte, Regis

Europe Echecs, 1988

8/p7/B7/8/8/8/1K1kpQ2/3b4

#2

3 + 4

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Qxe2#
    • 1...Bb3
      • 2.Qxe2#
    • 1...Ba4
      • 2.Qxe2#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qc3#
      • 1...Bc2
        • 2.Qxe2#
      • 1...Bb3
        • 2.Qxe2#
      • 1...Ba4
        • 2.Qxe2#
      • 1...Ke1!
  • Keys
    • 1.Qg1!
      • 1...e1Q
        • 2.Qd4#
      • 1...e1S
        • 2.Qg5#
      • 1...e1B
        • 2.Qd4#
        • 2.Qg5#
      • 1...e1R
        • 2.Qd4#
      • 1...Bc2
        • 2.Qc1#
      • 1...Bb3
        • 2.Qc1#
      • 1...Ba4
        • 2.Qc1#

Anticipated by 47236(1917), 22005(1923), 22080(1924), 109519(1934), 179999(1952), 234085(1970)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(B),XP(c)
  • Tries
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • QAB1(B)
      • Vars
        • B(a);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);N_PINP(c)
    • Vars
      • P(c);SBLOCK::QAR2(B)
      • P(c);SBLOCK::QAB(B)
      • B(a);OGATE::QAB1(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).