MESON Chess Problem Database

Problem Display
PID: 168297 (1Qn4b/1p2N3/qnpP4/1b4Rp/pP1k4/R7/2PN1K2/8 w - - 0 1)

Petite, Efren

Praca, 1999

1Qn4b/1p2N3/qnpP4/1b4Rp/pP1k4/R7/2PN1K2/8

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.c3#
    • 1...Sc4
      • 2.Rd3#
    • 1...Sxd6
      • 2.Qxh8#
    • 1...Sa7
      • 2.Qxh8#
    • 1...Sxe7
      • 2.Qxh8#
  • Tries
    • 1.Re3?
      • threat
        • 2.c3#
      • 1...Sd5
        • 2.Sf5#
      • 1...Bd3!
    • 1.Rc5?
      • threat
        • 2.Sf5#
      • 1...Sxd6
        • 2.Qxh8#
      • 1...Sxe7
        • 2.Qxh8#
      • 1...Bd3
        • 2.c3#
      • 1...Sd5!
  • Keys
    • 1.d7!
      • threat
        • 2.Qf4#
      • 1...Bd3
        • 2.c3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sd5
        • 2.Sf5#
      • 1...Sd6
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(c);SBLOCK::P(A)
    • S(f);S_CUTB(c)::R1(D)
    • S(i);OGATE,XP(G)::QAB(I),XB(j)
    • S(i);OGATE::QAB(I),XB(j)
    • S(i);OGATE,XS(H)::QAB(I),XB(j)
  • Tries
    • Try
      • R(D);
      • Threat
        • P(A)
      • Vars
        • S(f);SBLOCK::S(H)
      • Refutation
        • B(c);
    • Try
      • R(F);
      • Threat
        • S(H)
      • Vars
        • S(i);OGATE,XP(G)::QAB(I),XB(j)
        • S(i);OGATE,XS(H)::QAB(I),XB(j)
        • B(c);SBLOCK::P(A)
      • Refutation
        • S(f);
  • Actual
    • P(G);
    • Threat
      • QAR2(I)
    • Vars
      • B(c);SBLOCK::P(A)
      • B(j);N_GUARD::QAB1(I),XB(j)
      • S(f);SBLOCK::S(H)
      • S(i);OGATE::QAB(I),XB(j)
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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).