MESON Chess Problem Database

Problem Display
PID: 206429 (8/2KR4/6Q1/1pNNpb1r/2k3n1/1pp2B2/1p6/4rnB1 w - - 0 1)

Neunivako, Pavel Efimovich

Shakhmaty, 1925

8/2KR4/6Q1/1pNNpb1r/2k3n1/1pp2B2/1p6/4rnB1

#2

7 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Qxd3#
    • 1...Be6
      • 2.Qd3#
    • 1...Bxd7
      • 2.Qd3#
    • 1...b4
      • 2.Qa6#
  • Tries
    • 1.Be2+?
      • 1...Bd3
        • 2.Bxd3#
        • 2.Qxd3#
        • 2.Qe4#
      • 1...Rxe2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb6#
      • 1...Kxd3
        • 2.Se3#
      • 1...Bxd3
        • 2.Qc6#
      • 1...b4
        • 2.Qa6#
      • 1...c2
        • 2.Sxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(j);OGATE::QAB1(E),XB(j)
    • B(j);OGATE::QAB1(E)
    • B(j);OGATE,XR(G)::QAB1(E)
    • P(h);OGATEB::QAB(E)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • R(a);XB(B)
  • Actual
    • S(C);
    • Threat
      • S(D)
    • Vars
      • K(f);P_SPINB(j),S_FLIGHT,XS(C)::R(G)+S(D)
      • B(j);SBLOCK,XS(C)::QAR2(E)
      • P(h);OGATEB::QAB(E)
      • P(e);N_GUARD::S(C),XP(c)
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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).