MESON Chess Problem Database

Problem Display
PID: 84965 (1b5r/1Q2Bp2/4pP1R/2p1kB2/p3PN1R/4PP2/p6q/Kb6 w - - 0 1)

Petite, Efren

diagrammes, 1989

1b5r/1Q2Bp2/4pP1R/2p1kB2/p3PN1R/4PP2/p6q/Kb6

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qb2#
    • 1...Qg3
      • 2.Qb2#
    • 1...Qxf4
      • 2.Qb2#
    • 1...Qh1
      • 2.Qb2#
    • 1...Qb2+
      • 2.Qxb2#
    • 1...Qh3
      • 2.Qb2#
    • 1...Qxh4
      • 2.Qb2#
    • 1...Rxh6
      • 2.Qxb8#
    • 1...Rh7
      • 2.Qxb8#
    • 1...Bc2
      • 2.Qb2#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bxe4
      • 2.Qxe4#
    • 1...Ba7
      • 2.Qc7#
    • 1...Bc7
      • 2.Qxc7#
    • 1...c4
      • 2.Qb5#
    • 1...exf5
      • 2.Qd5#
  • Tries
    • 1.R4h5?
      • threat
        • 2.Bh3#
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Qxf4
        • 2.Qb2#
      • 1...Qxh5
        • 2.Qb2#
      • 1...Rxh6
        • 2.Qxb8#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...exf5
        • 2.Rxf5#
        • 2.Qd5#
      • 1...Qg1
        • 2.Bg4#
        • 2.Qb2#
      • 1...Qg3
        • 2.Bg4#
        • 2.Qb2#
      • 1...Qg2
        • 2.Bg4#
      • 1...Qh3
        • 2.Bxh3#
        • 2.Qb2#
      • 1...Qh4
        • 2.Qb2#
      • 1...Rg8!
    • 1.R6h5?
      • threat
        • 2.Bh7#
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Qxf4
        • 2.Qb2#
      • 1...Qxh4
        • 2.Qb2#
      • 1...Rxh5
        • 2.Qxb8#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...exf5
        • 2.Rxf5#
        • 2.Qd5#
      • 1...Qg1
        • 2.Qb2#
      • 1...Qg3
        • 2.Qb2#
      • 1...Qh3
        • 2.Qb2#
      • 1...Rh6
        • 2.Qxb8#
      • 1...Rh7
        • 2.Bxh7#
        • 2.Qxb8#
      • 1...Rg8
        • 2.Bg6#
      • 1...Qg2!
  • Keys
    • 1.Bxe6!
      • threat
        • 2.Qd5#
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...fxe6
        • 2.Sg6#
      • 1...Rd8
        • 2.R6h5#
      • 1...Qd2
        • 2.R4h5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • Q(c);N_GUARD::QAB(J)
    • Q(c);N_GUARD,XS(E)::QAB(J)
    • Q(c);CHECK,N_GUARD::QAB(J),XQ(c)
    • Q(c);N_GUARD,XR(F)::QAB(J)
    • R(j);N_GUARD,XR(I)::QAB(J),XB(i)
    • R(j);N_GUARD::QAB(J),XB(i)
    • B(a);S_CUTQ(c)::QAB(J)
    • B(a);N_GUARD::S(E),XB(a)
    • B(a);OGATE,XP(D)::QAR1(J),XB(a)
    • B(i);N_GUARD::QAB(J)
    • B(i);N_GUARD::QAB(J),XB(i)
    • P(e);OGATEB::QAR(J)
    • P(g);N_GUARD,XB(G)::QAR1(J)
  • Tries
    • Try
      • R(F);
      • Threat
        • R(F)+B(G)
      • Vars
        • Q(c);CHECK,N_GUARD::QAB(J),XQ(c)
        • Q(c);N_GUARD,XS(E)::QAB(J)
        • Q(c);N_GUARD,XR(F)::QAB(J)
        • R(j);N_GUARD,XR(I)::QAB(J),XB(i)
        • B(a);OGATE,XP(D)::QAR1(J),XB(a)
        • Q(c);N_GUARD::R(F)+B(G)
        • Q(c);N_GUARD::QAB(J)
      • Refutation
        • R(j);
    • Try
      • R(I);
      • Threat
        • R(I)+B(G)
      • Vars
        • Q(c);CHECK,N_GUARD::QAB(J),XQ(c)
        • Q(c);N_GUARD,XS(E)::QAB(J)
        • Q(c);N_GUARD,XR(F)::QAB(J)
        • R(j);N_GUARD,XR(I)::QAB(J),XB(i)
        • B(a);OGATE,XP(D)::QAR1(J),XB(a)
        • Q(c);N_GUARD::QAB(J)
        • R(j);N_GUARD::QAB(J),XB(i)
        • R(j);N_GUARD::R(I)+B(G)
      • Refutation
        • Q(c);
  • Actual
    • B(G);XP(g)
    • Threat
      • QAR1(J)
    • Vars
      • Q(c);CHECK,N_GUARD::QAB(J),XQ(c)
      • B(a);OGATE,XP(D)::QAR1(J),XB(a)
      • P(h);N_GUARD,SBLOCK,XB(G)::S(E)
      • R(j);N_GUARD::R(I)
      • Q(c);N_GUARD::R(F)
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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).