MESON Chess Problem Database

Problem Display
PID: 168391 (4K2Q/5BNp/1R6/4pp1P/3PkP2/2pNqp1P/2P1P3/5RB1 w - - 0 1)

Petite, Efren

4th HM., Labai-60 JT, 2002

4K2Q/5BNp/1R6/4pp1P/3PkP2/2pNqp1P/2P1P3/5RB1

#2

14 + 7

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Rb4#
    • 1...Qc1
      • 2.exf3#
    • 1...Qd2
      • 2.exf3#
    • 1...Qxd4
      • 2.exf3#
    • 1...Qxf4
      • 2.Sc5#
  • Tries
    • 1.Se6?
      • threat
        • 2.Qxe5#
      • 1...Qxd4
        • 2.Sg5#
      • 1...Qxf4
        • 2.Sec5#
      • 1...exd4
        • 2.Sec5#
        • 2.Sg5#
        • 2.Qe5#
      • 1...exf4
        • 2.Sec5#
        • 2.Sg5#
        • 2.Qe5#
      • 1...Kd5!
    • 1.exf3+?
      • 1...Kxd4
        • 2.Sxf5#
        • 2.Rb4#
        • 2.Rd6#
      • 1...Qxf3!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qxe5#
      • 1...Kxf5
        • 2.Qxh7#
      • 1...Qxd4
        • 2.Sg3#
      • 1...Qxf4
        • 2.Sd6#
      • 1...exd4
        • 2.Sg3#
        • 2.Sd6#
        • 2.Qe5#
      • 1...exf4
        • 2.Sd6#
        • 2.Qe5#

Anticipated by 168261(1961)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(d);OGATEB,P-FLIGHT,P_SPINQ(b),XP(G)::R(J)
    • Q(b);N_GUARD::P(D),XP(c)
    • Q(b);N_GUARD,XP(G)::P(D),XP(c)
    • Q(b);SBLOCK,XP(H)::S(E)
  • Tries
    • Try
      • S(L);
      • Threat
        • QAR1(N),XP(e)
      • Vars
        • Q(b);XP(G)::S(L)
        • Q(b);XP(H)::S(L)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(D);CHECK,XP(c)
      • Refutation
        • Q(b);XP(D)
  • Actual
    • S(L);XP(f)
    • Threat
      • QAR1(N),XP(e)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(L)::QAB(N),XP(g)
      • Q(b);XP(G)::S(L)
      • Q(b);XP(H)::S(L)
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).