MESON Chess Problem Database

Problem Display
PID: 198233 (1b5B/pK6/2p2q2/1pN1k2p/3R1nRN/6rp/5pp1/1b1Q4 w - - 0 1)

van Beek, Huibrecht

1st HM., Club Argentino de Ajedrez, 1920

1b5B/pK6/2p2q2/1pN1k2p/3R1nRN/6rp/5pp1/1b1Q4

#2

7 + 13

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7+
      • 2.Bxg7#
    • 1...Ba2
      • 2.Re4#
    • 1...Be4
      • 2.Rxe4#
    • 1...Sd3
      • 2.Rge4#
    • 1...Se6
      • 2.Sd7#
  • Tries
    • 1.Rd7?
      • threat
        • 2.Qd4#
      • 1...Rd3
        • 2.Rg5#
      • 1...Bd3
        • 2.Qa1#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Se2
        • 2.Re7#
      • 1...Sd3
        • 2.Re4#
      • 1...Se6!
    • 1.Rg5+?
      • 1...Bf5
        • 2.Re4#
        • 2.Rxf5#
      • 1...Rxg5!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Qd4#
      • 1...Qg7+
        • 2.Bxg7#
      • 1...Rd3
        • 2.Rg5#
      • 1...Bd3
        • 2.Qa1#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Se2
        • 2.Re8#
      • 1...Sd3
        • 2.Re4#
      • 1...Se6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(k);CHECK,OGATEB::B(G),XQ(k)
    • B(a);N_GUARD::R1(B)
    • B(a);N_GUARD::R1(B),XB(a)
    • S(f);OGATE::R1(C)
    • S(f);SBLOCK::S(E)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • R(d);N_GUARD,S_CUTB(a)::R(C)
        • B(a);OGATE::QAB(A)
        • B(m);N_GUARD::QAB1(A),XB(m)
        • S(f);N_GUARD::R(B)
        • S(f);OGATE::R1(C)
      • Refutation
        • S(f);
    • Try
      • R(C);CHECK
      • Refutation
        • R(d);XR(C)
  • Actual
    • R(B);
    • Threat
      • QAB1(A)
    • Vars
      • Q(k);CHECK,OGATEB::B(G),XQ(k)
      • R(d);N_GUARD,S_CUTB(a)::R(C)
      • B(a);OGATE::QAB(A)
      • B(m);N_GUARD::QAB1(A),XB(m)
      • S(f);N_GUARD::R(B)
      • S(f);OGATE::R1(C)
      • S(f);SBLOCK::S(E)
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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).