MESON Chess Problem Database

Problem Display
PID: 276651 (2Q5/4N2K/3NP3/r3pBR1/2nkpP2/1R6/2P5/5b2 w - - 0 1)

Pereira, Alvaro

Quaresma, Luis

Best Problems, 2023

2Q5/4N2K/3NP3/r3pBR1/2nkpP2/1R6/2P5/5b2

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sb5#
    • 1...Ra2
      • 2.Sb5#
    • 1...Ra3
      • 2.Sb5#
    • 1...Ra4
      • 2.Sb5#
    • 1...Rb5
      • 2.Sxb5#
    • 1...Ra6
      • 2.Sb5#
    • 1...Ra7
      • 2.Sb5#
    • 1...Ra8
      • 2.Sb5#
    • 1...Bg2
      • 2.Qxc4#
    • 1...Bh3
      • 2.Qxc4#
    • 1...Sb2
      • 2.Qc3#
    • 1...Sd2
      • 2.Qc3#
    • 1...Sa3
      • 2.Qc3#
    • 1...Se3
      • 2.Qc3#
    • 1...Sb6
      • 2.Qc3#
    • 1...Sxd6
      • 2.Qc3#
    • 1...e3
      • 2.c3#
  • Tries
    • 1.Bh3?
      • threat
        • 2.Sdf5#
      • 1...Bxh3
        • 2.Qxc4#
      • 1...Sxd6
        • 2.Qc3#
      • 1...exf4
        • 2.Sc6#
      • 1...Se3
        • 2.Qc3#
      • 1...e3!
    • 1.Bg4?
      • threat
        • 2.Sdf5#
      • 1...Sxd6
        • 2.Qc3#
      • 1...exf4
        • 2.Sc6#
      • 1...Se3
        • 2.Qc3#
      • 1...e3!
    • 1.Rgg3?
      • threat
        • 2.c3#
      • 1...Se3
        • 2.Qc3#
      • 1...exf4!
  • Keys
    • 1.Bg6!
      • threat
        • 2.Sdf5#
      • 1...Sxd6
        • 2.Qc3#
      • 1...exf4
        • 2.Sc6#
      • 1...e3
        • 2.c3#
      • 1...Bh3
        • 2.Qxc4#
      • 1...Se3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • R(e);N_GUARD::S(F)
    • R(e);N_GUARD::S(F),XR(e)
    • R(e);N_GUARD,P_PINS(H)::S(F)
    • B(a);N_GUARD::QAR1(J),XS(b)
    • S(b);OGATE::QAB1(J)
    • S(b);OGATE,XS(F)::QAB1(J)
    • P(d);SBLOCK::P(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • S(F)
      • Vars
        • B(a);N_GUARD,XB(D)::QAR1(J),XS(b)
        • S(b);OGATE,XS(F)::QAB1(J)
        • P(f);XP(C)::S(H)
        • S(b);OGATE::QAB1(J)
      • Refutation
        • P(d);
    • Try
      • B(D);
      • Threat
        • S(F)
      • Vars
        • S(b);OGATE,XS(F)::QAB1(J)
        • P(f);XP(C)::S(H)
        • S(b);OGATE::QAB1(J)
      • Refutation
        • P(d);
    • Try
      • R(E);
      • Threat
        • P(A)
      • Vars
        • S(b);OGATE::QAB1(J)
      • Refutation
        • P(f);XP(C)
  • Actual
    • B(D);
    • Threat
      • S(F)
    • Vars
      • S(b);OGATE,XS(F)::QAB1(J)
      • P(f);XP(C)::S(H)
      • P(d);SBLOCK::P(A)
      • B(a);N_GUARD::QAR1(J),XS(b)
      • S(b);OGATE::QAB1(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).