MESON Chess Problem Database

Problem Display
PID: 218526 (2R1Bn2/3P3b/1P6/1k1r1N1R/N1p1P3/2P1p3/3Q4/1K6 w - - 0 1)

Patrick, IJ

Cincinnati Commercial, 1881

2R1Bn2/3P3b/1P6/1k1r1N1R/N1p1P3/2P1p3/3Q4/1K6

#2

11 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4+?
      • 1...Kxa4
        • 2.Qa2#
      • 1...Ka5
        • 2.Ra8#
      • 1...Ka6!
    • 1.Qb2+?
      • 1...Kxa4
        • 2.Qb4#
      • 1...Ka5
        • 2.Ra8#
      • 1...Ka6!
    • 1.Qxd5+?
      • 1...Ka6
        • 2.Ra8#
      • 1...Kxa4!
  • Keys
    • 1.Sd6+!
      • 1...Kxa4
        • 2.Qa2#
      • 1...Ka5
        • 2.Ra8#
      • 1...Ka6
        • 2.Ra8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK,P_PINR(d),P_SPINP(E)
      • Vars
        • K(c);N_SPINR(d),S_FLIGHT,XS(D)::QAR2(B)
        • K(c);P-FLIGHT::R(J)
      • Refutation
        • K(c);N_SPINR(d),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(D)::QAR1(B)
        • K(c);P-FLIGHT::R(J)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK,XR(d)
      • Vars
        • K(c);S_FLIGHT::R(J)
      • Refutation
        • K(c);S_FLIGHT,XS(D)
  • Actual
    • S(F);CHECK,P_PINR(d),P_SPINP(E)
    • Vars
      • K(c);N_SPINR(d),S_FLIGHT,XS(D)::QAR2(B)
      • K(c);P-FLIGHT::R(J)
      • K(c);N_SPINR(d),S_FLIGHT::R(J)
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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).