MESON Chess Problem Database

Problem Display
PID: 169306 (1b1Q4/2qP4/1k1B4/2NP4/1K6/8/8/8 w - - 0 1)

Popov, Grigory Leontievich

Comm., SuperProblem 186. TT, 2017

1b1Q4/2qP4/1k1B4/2NP4/1K6/8/8/8

#2

6 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Bxc7#
      • 2.Qxc7#
  • Tries
    • 1.Bxc7+?
      • 1...Ka7
        • 2.Qxb8#
      • 1...Bxc7!
    • 1.Qxb8+?
      • 1...Qb7
        • 2.Bc7#
        • 2.Qxb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qxb8!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qa6#
      • 1...Qxc5+
        • 2.Bxc5#
      • 1...Ka7
        • 2.Qa6#
      • 1...Qxd6
        • 2.Qb7#
      • 1...Qxc8
        • 2.dxc8S#
      • 1...Qa7
        • 2.Qc6#
      • 1...Qb7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK,XQ(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(F),XB(c)
      • Refutation
        • B(c);P_SPINB(c),XB(D)
    • Try
      • Q(F);CHECK,N_PINQ(b),XB(c)
      • Refutation
        • Q(b);XQ(F)
  • Actual
    • Q(F);N_PINQ(b)
    • Threat
      • QAR1(F)
    • Vars
      • Q(b);CHECK,OGATE,XS(B)::B(D),XQ(b)
      • K(a);S_FLIGHT::QAR1(F)
      • Q(b);N_GUARD,P_PINS(B),XB(D)::QAR1(F)
      • Q(b);OGATE,XQ(F)::PXQ(b)=S
      • Q(b);OGATE,SBLOCK::QAR1(F)
      • Q(b);N_GUARD::QAR1(F),XQ(b)
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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).