MESON Chess Problem Database

Problem Display
PID: 284025 (2Q4b/8/4pp2/R3qk1B/1p3p2/1P1K1N2/3P4/8 w - - 0 1)

Subrahmanyam, Swaminatha

Probleemblad, 1957

2Q4b/8/4pp2/R3qk1B/1p3p2/1P1K1N2/3P4/8

#2

7 + 7

5454 Near Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5+
      • 2.Rxb5#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qd5+
      • 2.Rxd5#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qh7#
      • 1...Qb5+
        • 2.Rxb5#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Bg7!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Kc4#
      • 1...Qb5+
        • 2.Kd4#
      • 1...Qd5+
        • 2.Ke2#
      • 1...Qc5
        • 2.Ke2#

Anticipated by 203497(1924)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,OGATEB::R(E),XQ(c)
    • Q(c);OGATEB::R(E),XQ(c)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • Q(c);CHECK,OGATEB::R(E),XQ(c)
      • Refutation
        • B(g);
  • Actual
    • Q(G);N_PINP(e)
    • Threat
      • QAB(G)+K(C)
    • Vars
      • Q(c);CHECK::QAB(G)+K(C)
      • Q(c);::QAB(G)+K(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).