MESON Chess Problem Database

Problem Display
PID: 83585 (1B1N4/8/6p1/1p1kp3/1p1b3Q/1Rpqp1K1/B3N3/3R4 w - - 0 1)

Ellerman, Arnoldo

3rd Prize, Good Companions (November), 1922

1B1N4/8/6p1/1p1kp3/1p1b3Q/1Rpqp1K1/B3N3/3R4

#2

8 + 9

3391 Het Half Pin Thema 1924
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Rxc3#
    • 1...Bc5
      • 2.Rxb4#
  • Tries
    • 1.Rxb4+?
      • 1...Qc4
        • 2.Rxb5#
      • 1...Kc5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qc6#
      • 1...Kc4
        • 2.Rxc3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5
        • 2.Qc6#
      • 1...Qc4
        • 2.Qxe5#
      • 1...Bc5
        • 2.Rxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);P_SPINB(e),S_FLIGHT::B(B)+R(D),DCHECK,XP(a)
    • B(e);P_SPINQ(b),SBLOCK::B(B)+R(D),XP(d)
  • Tries
    • Try
      • R(D);CHECK,XP(d)
      • Vars
        • Q(b);P_SPINB(e),P_SPINQ(b)::R(D),XP(f)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(g);S_FLIGHT::B(B)+R(D),DCHECK,XP(a)
      • K(g);S_FLIGHT::QAB1(F)
      • K(g);P-FLIGHT::QAR1(F)
      • Q(b);P_SPINB(e),SBLOCK::QAR1(F),XP(h)
      • B(e);P_SPINQ(b),SBLOCK::B(B)+R(D),XP(d)
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).