MESON Chess Problem Database

Problem Display
PID: 169302 (2R5/8/1Q6/8/8/p7/1qR5/bkNN3K w - - 0 1)

Narayanan, Chithathuz Gopatan Sathya

Seetharaman, Kalyan

4th HM., SuperProblem 186. TT, 2017

2R5/8/1Q6/8/8/p7/1qR5/bkNN3K

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb2+?
      • 1...axb2
        • 2.Qg6#
      • 1...Bxb2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Rxb2#
      • 1...Qh8+
        • 2.Rh2#
      • 1...Qb7+
        • 2.R2c6#
      • 1...Qxc1
        • 2.Rb2#
      • 1...Qxc2
        • 2.Qxc2#
      • 1...Qb3
        • 2.Rb2#
      • 1...Qc3
        • 2.R2xc3#
      • 1...Qd4
        • 2.Rb2#
      • 1...Qe5
        • 2.Rb2#
      • 1...Qf6
        • 2.Rb2#
      • 1...Qg7
        • 2.Rb2#
      • 1...Qa2
        • 2.Rxa2#
        • 2.Rb2#
      • 1...Qb4
        • 2.Rb2#
        • 2.R2c4#
      • 1...Qb5
        • 2.Rb2#
      • 1...Qb6
        • 2.Rb2#
        • 2.R2c6#
      • 1...Qb8
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.R2c3#
        • 2.R2c4#
        • 2.R2c5#
        • 2.R2c6#
        • 2.R2c7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK,XQ(c)
      • Vars
        • P(d);P_SPINP(d),XR(D)::QAB(E)
      • Refutation
        • B(a);P_SPINB(a),XR(D)
  • Actual
    • Q(E);N_PINQ(c)
    • Threat
      • QAB(E)+R(D),DCHECK,XQ(c)
    • Vars
      • Q(c);CHECK,N_GUARD::QAB(E)+R(D)
      • Q(c);P_PINS(B),XS(A)::QAB(E)+R(D),DCHECK
      • Q(c);OGATE,P_SPINQ(c),XR(D)::QAB1(E),XQ(c)
      • Q(c);::QAB(E)+R(D),DCHECK
      • Q(c);N_GUARD::QAB(E)+R(D),XQ(c)
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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).