MESON Chess Problem Database

Problem Display
PID: 269660 (b2B4/3p1pR1/Rq1pkPN1/1N3pp1/1bPp4/3Q4/4B3/6K1 w - - 0 1)

Magini, Fabio

Best Problems, 2023

b2B4/3p1pR1/Rq1pkPN1/1N3pp1/1bPp4/3Q4/4B3/6K1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Sxd4#
    • 1...Qc7
      • 2.Sxd4#
      • 2.Sxc7#
    • 1...Qxa6
      • 2.Sxd4#
      • 2.Sc7#
    • 1...Qc6
      • 2.Sxd4#
    • 1...Qb7
      • 2.Sxd4#
    • 1...Qb8
      • 2.Sxd4#
    • 1...f4
      • 2.Bg4#
  • Tries
    • 1.Rxb6?
      • threat
        • 2.Sxd4#
        • 2.Sc7#
      • 1...Bc3
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Bc5
        • 2.Sc7#
      • 1...fxg6!
    • 1.Qe4+?
      • 1...fxe4
        • 2.Bg4#
      • 1...Bxe4!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Sf8#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Qxd8
        • 2.Qe5#
      • 1...fxg6
        • 2.Re7#
      • 1...f4
        • 2.Bg4#
      • 1...d5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD,P_SPINP(f)::S(E),XP(b)
    • Q(e);N_GUARD::S(E),XP(b)
    • P(c);OGATEB::B(B)
  • Tries
    • Try
      • R(F);P_PINP(f),XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::S(E)
      • Refutation
        • P(i);XS(H)
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);S_CUTB(j),XQ(C)::B(B)
      • Refutation
        • B(j);XQ(C)
  • Actual
    • Q(C);P_SPINQ(C),XP(b)
    • Threat
      • S(H)
    • Vars
      • Q(e);CHECK,P_SPINP(f),XQ(C)::S(E),XQ(e)
      • Q(e);N_PINQ(C),P_SPINP(f),XB(J)::QAR1(C)
      • P(i);OGATE,XS(H)::R1(I)
      • P(c);OGATEB::B(B)
      • P(f);P_SPINQ(e),S_CUTB(j)::QAR(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).