MESON Chess Problem Database

Problem Display
PID: 204451 (B2R4/8/q1PB4/p2k1P2/r2p3K/7n/p2NN1b1/Q7 w - - 0 1)

Hartong, Jan

Shakhmaty, 1925

B2R4/8/q1PB4/p2k1P2/r2p3K/7n/p2NN1b1/Q7

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.c7#
    • 1...Qd3
      • 2.c7#
    • 1...Ra3
      • 2.Qxd4#
    • 1...Bh1
      • 2.Qxh1#
    • 1...Sg1
      • 2.Sf4#
    • 1...Sf2
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sg5
      • 2.Sf4#
    • 1...d3+
      • 2.Bb4#
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qxg2#
      • 1...d3+
        • 2.Bf4#
      • 1...Qxe2
        • 2.c7#
      • 1...Sxg1
        • 2.Sf4#
      • 1...Qd3
        • 2.c7#
      • 1...Ra3
        • 2.Qxd4#
      • 1...Bf1
        • 2.Qg8#
      • 1...Bh1
        • 2.Qxh1#
        • 2.Qg8#
      • 1...Bf3
        • 2.Qg8#
      • 1...Be4
        • 2.Qg8#
      • 1...Sf2
        • 2.Sf4#
      • 1...Sf4
        • 2.Sxf4#
      • 1...Sg5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(h);N_GUARD,XS(C)::B(H)+P(F)
    • Q(h);N_GUARD::B(H)+P(F)
    • R(d);N_GUARD::QAR1(A),XP(e)
    • B(b);OGATEB::QAB(A),XB(b)
    • S(c);N_GUARD::S(C)
    • S(c);N_GUARD::S(C),XS(c)
    • P(e);CHECK::R(I)+B(G)
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XB(b)
    • Vars
      • P(e);CHECK::R(I)+B(G)
      • Q(h);N_GUARD,XS(C)::B(H)+P(F)
      • S(c);N_GUARD,XQ(A)::S(C)
      • Q(h);N_GUARD::B(H)+P(F)
      • R(d);N_GUARD::QAR1(A),XP(e)
      • B(b);OGATE::QAB(A)
      • S(c);N_GUARD::S(C)
      • S(c);N_GUARD::S(C),XS(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).