MESON Chess Problem Database

Problem Display
PID: 283005 (8/Q5R1/3ppB1p/2p2p2/2pP1kPP/3p1P1p/5K2/2NN4 w - - 0 1)

Bielefeldt, German

Cabrera, Virginio

Best Problems, 2025

8/Q5R1/3ppB1p/2p2p2/2pP1kPP/3p1P1p/5K2/2NN4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Se2#
    • 1...c3
      • 2.Sxd3#
    • 1...cxd4
      • 2.Qxd4#
    • 1...d5
      • 2.Be5#
    • 1...h5
      • 2.Bg5#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qd2#
      • 1...d2
        • 2.Se2#
        • 2.Qxd2#
      • 1...c3
        • 2.Sxd3#
      • 1...fxg4!
    • 1.Qa5?
      • threat
        • 2.Qd2#
      • 1...d2
        • 2.Se2#
        • 2.Qxd2#
      • 1...c3
        • 2.Sxd3#
      • 1...fxg4!
  • Keys
    • 1.Se3!
      • 1...cxd4
        • 2.Qxd4#
      • 1...fxg4
        • 2.Rxg4#
      • 1...h2
        • 2.Sg2#
      • 1...d2
        • 2.Se2#
      • 1...c3
        • 2.Sxd3#
      • 1...d5
        • 2.Be5#
      • 1...e5
        • 2.Sd5#
      • 1...h5
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::S(A)
    • P(c);N_GUARD::S(A),XP(a)
    • P(e);OGATE,XP(E)::QAR2(I),XP(e)
    • P(g);N_GUARD::B(H)
    • P(i);N_GUARD::B(H)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • P(c);N_GUARD::S(A),XP(a)
      • Refutation
        • P(f);XP(F)
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • P(c);N_GUARD::S(A),XP(a)
      • Refutation
        • P(f);XP(F)
  • Actual
    • S(B);
    • Vars
      • P(e);OGATE,XP(E)::QAR2(I),XP(e)
      • P(f);OGATE,XP(F)::R1(J),XP(f)
      • P(b);N_GUARD::S(B)
      • P(a);N_GUARD::S(A)
      • P(c);N_GUARD::S(A),XP(a)
      • P(g);N_GUARD::B(H)
      • P(h);N_GUARD::S(B)
      • P(i);N_GUARD::B(H)
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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).