MESON Chess Problem Database

Problem Display
PID: 168364 (8/4N3/2p1nB2/2b1N3/4k1K1/1nQp1p2/2b2P2/8 w - - 0 1)

Petite, Efren

Sachove umeni (Ceskoslovensky sach), 2004

8/4N3/2p1nB2/2b1N3/4k1K1/1nQp1p2/2b2P2/8

#2

6 + 8

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qxd3#
    • 1...Bd4
      • 2.Qxc6#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qe5#
      • 1...Bd4
        • 2.Sd6#
      • 1...Bd6
        • 2.Sxd6#
        • 2.Qe1#
      • 1...Sbd4
        • 2.Sd2#
      • 1...d2
        • 2.Qxc2#
        • 2.Qxf3#
      • 1...Sed4!
    • 1.Sf7?
      • threat
        • 2.Qe5#
      • 1...Sed4
        • 2.Sg5#
      • 1...Bd4
        • 2.Sd6#
        • 2.Qxc6#
      • 1...Bd6
        • 2.Sxd6#
        • 2.Qe1#
        • 2.Qxc6#
      • 1...d2
        • 2.Qxc2#
        • 2.Qxf3#
      • 1...Sbd4!
    • 1.Qe1+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Kd4!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Qe5#
      • 1...Bd4
        • 2.Qxc6#
      • 1...Bd6
        • 2.Qe1#
        • 2.Qxc6#
      • 1...Sbd4
        • 2.Sd2#
      • 1...Sed4
        • 2.Sg5#
      • 1...d2
        • 2.Qxc2#

Anticipated by 168446(1987)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB1(B),XP(c)
    • B(f);OGATE,SBLOCK::QAB(B),XP(g)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • B(f);N_GUARD::S(D)
        • S(b);N_GUARD::S(D)
      • Refutation
        • S(h);
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • S(h);N_GUARD::S(D)
      • Refutation
        • S(b);
    • Try
      • Q(B);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(B),XB(f)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(D);XP(d)
    • Threat
      • QAR1(B)
    • Vars
      • B(f);OGATE::QAB(B),XP(g)
      • S(b);N_GUARD::S(D)
      • S(h);N_GUARD::S(D)
      • P(c);OGATEB::QAB(B),XB(a)
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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).