MESON Chess Problem Database

Problem Display
PID: 101460 (7R/1nbp4/P1k5/4Q3/N1n1P3/6R1/4B2K/2rr1b2 w - - 0 1)

Stubbs, Arthur Goodwin

Good Companions, 1921

7R/1nbp4/P1k5/4Q3/N1n1P3/6R1/4B2K/2rr1b2

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qd5#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Sd2
      • 2.Qd5#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
    • 1...d6
      • 2.Qe8#
  • Tries
    • 1.Rh6+?
      • 1...Rd6
        • 2.Qd5#
      • 1...Scd6
        • 2.Qb5#
      • 1...Sbd6
        • 2.Qc5#
      • 1...d6
        • 2.Qe8#
      • 1...Bd6!
  • Keys
    • 1.Rg6+!
      • 1...Rd6
        • 2.Qd5#
      • 1...Bd6
        • 2.Rc8#
      • 1...Scd6
        • 2.Qb5#
      • 1...Sbd6
        • 2.Qc5#
      • 1...d6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAB1(F)
    • R(b);N_GUARD::QAB1(F),XR(b)
    • S(d);S_CUTR(b)::QAB1(F)
    • S(f);N_GUARD::QAR1(F)
    • S(f);N_GUARD::QAR1(F),XS(f)
    • P(h);OGATEB,SBLOCK::QAB(F)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB1(F)
        • S(d);P_SPINS(d)::QAB1(F)
        • S(f);P_SPINS(f)::QAR1(F)
        • P(h);P_SPINP(h),S_CUTB(g),S_CUTR(b),S_CUTS(d),S_CUTS(f)::QAB(F)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • R(C);CHECK,P_SPINQ(F)
    • Vars
      • R(b);N_PINQ(F),P_SPINR(b)::QAB1(F)
      • B(g);P_SPINB(g),S_CUTP(h),S_CUTR(b),S_CUTS(d),S_CUTS(f)::R(H)
      • S(d);N_PINQ(F),P_SPINS(d)::QAB1(F)
      • S(f);N_PINQ(F),P_SPINS(f)::QAR1(F)
      • P(h);N_PINQ(F),P_SPINP(h)::QAB(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).