MESON Chess Problem Database

Problem Display
PID: 168241 (K5R1/1p3p1B/1p6/bP6/N1k2p2/n1N4p/1Q2npbq/3R4 w - - 0 1)

Petite, Efren

Probleemblad, 1982

K5R1/1p3p1B/1p6/bP6/N1k2p2/n1N4p/1Q2npbq/3R4

#2

8 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rc8#
    • 1...Bb4
      • 2.Qa2#
    • 1...Sd4
      • 2.Bd3#
    • 1...Sxb5
      • 2.Qxb5#
  • Tries
    • 1.Sxb6+?
      • 1...Kc5
        • 2.Sca4#
      • 1...Bxb6!
    • 1.Be4?
      • threat
        • 2.Rc8#
      • 1...Sxb5
        • 2.Qxb5#
      • 1...Bb4
        • 2.Qa2#
      • 1...Sd4
        • 2.Bd3#
      • 1...f3
        • 2.Bd5#
      • 1...Bxe4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Rc8#
      • 1...Bxd5
        • 2.Bd3#
      • 1...Sxb5
        • 2.Qa2#
      • 1...Bd2
        • 2.Sdxb6#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...f3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::R(H)
    • B(i);SBLOCK::QAB(B)
    • S(a);SBLOCK::B(F)
    • S(e);OGATE,XP(E)::QAB1(B),XS(e)
  • Tries
    • Try
      • S(D);CHECK,XP(j)
      • Vars
        • K(g);P-FLIGHT::S(C)
      • Refutation
        • B(i);XS(D)
    • Try
      • B(F);
      • Threat
        • R(H)
      • Vars
        • S(e);OGATE,XP(E)::QAB1(B),XS(e)
        • B(i);SBLOCK::QAB(B)
        • S(a);SBLOCK::B(F)
        • P(h);S_CUTB(c)::B(F)
      • Refutation
        • B(c);XB(F)
  • Actual
    • S(C);
    • Threat
      • R(H)
    • Vars
      • B(c);SBLOCK,XS(C)::B(F)
      • S(e);SBLOCK,XP(E)::QAB(B)
      • B(i);N_GUARD::S(C),XP(j)
      • B(i);N_GUARD::QAR1(B),XB(i)
      • S(a);N_GUARD::R1(A),XS(a)
      • P(h);N_GUARD::S(C)
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).