MESON Chess Problem Database

Problem Display
PID: 6333 (4Q3/8/Pk3B2/8/1P6/K7/8/8 w - - 0 1)

Torngren, Pehr Hendrik

Sp. Prize, Svenska Dagbladet, 1928

4Q3/8/Pk3B2/8/1P6/K7/8/8

#2

5 + 1

81 Chess 1956
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Bd4+?
      • 1...Kxa6
        • 2.Qc6#
      • 1...Kc7!
    • 1.Qc6+?
      • 1...Ka7
        • 2.Qb7#
      • 1...Kxc6!
    • 1.Qc8?
      • threat
        • 2.Qb7#
      • 1...Ka7
        • 2.Bd4#
        • 2.Qb7#
      • 1...Kb5!
  • Keys
    • 1.b5!
      • 1...Ka5
        • 2.Bd8#
      • 1...Kc5
        • 2.Qc6#
      • 1...Ka7
        • 2.Bd4#
      • 1...Kc7
        • 2.Qd8#

Anticipated by 19007(1911)

This anticipates 230275(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(B);
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAB1(E)
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).