MESON Chess Problem Database

Problem Display
PID: 231431 (Qbk1K3/1p2P3/8/3N4/8/8/8/8 w - - 0 1)

Regos, Imre

Magyar Sakkvilag, 1927

Qbk1K3/1p2P3/8/3N4/8/8/8/8

#2

4 + 3

6490 yacpdb 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qa6#
    • 1...b6
      • 2.Qa6#
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qd8#
      • 1...Bc7
        • 2.Qxc7#
      • 1...b5
        • 2.Qa6#
      • 1...b6
        • 2.Qa6#

This anticipates 221412(2020)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAB(C)
  • Actual
    • Q(C);N_PINB(b)
    • Threat
      • QAR1(C)
    • Vars
      • B(b);N_GUARD::QAR1(C),XB(b)
      • P(a);OGATEB::QAB(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).