MESON Chess Problem Database

Problem Display
PID: 198870 (bb2R1BB/r2p4/r7/ppp1N3/4k1P1/1N2p1K1/4P3/2R1n3 w - - 0 1)

Muller, WCAL

Brisbane Courier, 1921

bb2R1BB/r2p4/r7/ppp1N3/4k1P1/1N2p1K1/4P3/2R1n3

#2

9 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sc6#
    • 1...Bxe5+
      • 2.Rxe5#
    • 1...Sd3
      • 2.exd3#
    • 1...Sf3
      • 2.exf3#
    • 1...b4
      • 2.Rc4#
    • 1...d6
      • 2.Sd7#
  • Keys
    • 1.Rd1!
      • threat
        • 2.Sxc5#
      • 1...Bxe5+
        • 2.Rxe5#
      • 1...Rc6
        • 2.Bd5#
      • 1...Rc7
        • 2.Sc6#
      • 1...Bd6
        • 2.Bh7#
      • 1...Sd3
        • 2.exd3#
      • 1...c4
        • 2.Sc5#
        • 2.Rd4#
      • 1...d6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(h);N_PINS(F)::R(G)+S(F)
    • B(k);CHECK,OGATE,P_SPINB(k),XS(F)::R1(G),XB(k)
    • S(a);OGATE::P(B),XS(a)
    • P(e);N_GUARD::R(A)
    • P(i);N_PINS(F)::R(G)+S(F)
  • Actual
    • R(A);
    • Threat
      • S(C),XP(f)
    • Vars
      • B(k);CHECK,OGATE,P_SPINB(k),XS(F)::R1(G),XB(k)
      • R(g);S_CUTB(j)::B(H)
      • R(h);N_PINS(F)::R(G)+S(F)
      • B(k);S_CUTR(g)::B(H)
      • S(a);OGATE::P(B),XS(a)
      • P(i);N_PINS(F)::R(G)+S(F)
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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).