MESON Chess Problem Database

Problem Display
PID: 174850 (1KR1R3/1B6/1Bpr1p2/3k1P2/3p2N1/1Pn2n2/2Q5/1qr3b1 w - - 0 1)

Barth, Michael

2nd Prize, Olimpiya dunyasi, 2011

1KR1R3/1B6/1Bpr1p2/3k1P2/3p2N1/1Pn2n2/2Q5/1qr3b1

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Qxb3#
    • 1...Rd8
      • 2.Rcxd8#
      • 2.Rexd8#
  • Tries
    • 1.Rxc6?
      • threat
        • 2.Rc5#
      • 1...Rd8+
        • 2.Rxd8#
      • 1...Rxc6
        • 2.Rd8#
      • 1...Re6
        • 2.Rcxe6#
      • 1...Rd7
        • 2.Sxf6#
      • 1...d3!
    • 1.Red8?
      • threat
        • 2.Bxc6#
      • 1...Rxd8
        • 2.Rxd8#
      • 1...Rd7
        • 2.Rxd7#
      • 1...Se5
        • 2.Sxf6#
      • 1...Qxb3!
  • Keys
    • 1.Rcd8!
      • threat
        • 2.Sxf6#
      • 1...Rxd8+
        • 2.Rxd8#
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Rd7
        • 2.Rxd7#
      • 1...Se4
        • 2.Bxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,XP(B)::QAB(A),XQ(a)
  • Tries
    • Try
      • R(H);XP(h)
      • Threat
        • B(F)+R(H),DCHECK
      • Vars
        • R(i);CHECK,OGATEB::R(I),XR(i)
        • R(i);OGATEB,P_SPINR(i),XR(H)::R(I)
        • R(i);OGATE::B(F)+R(H),XR(i)
        • R(i);N_GUARD::S(C),XP(j)
      • Refutation
        • P(f);
    • Try
      • R(I);P_PINR(i)
      • Threat
        • B(F),XP(h)
      • Vars
        • R(i);N_SPINR(i),OGATE,P_PINR(H),XR(I)::R(H),XR(i)
        • R(i);OGATEB::R(I),XR(i)
        • S(e);SBLOCK::S(C),XP(j)
      • Refutation
        • Q(a);XP(B)
  • Actual
    • R(H);P_PINR(i)
    • Threat
      • S(C),XP(j)
    • Vars
      • R(i);CHECK,N_SPINR(i),OGATE,XR(H)::R(I),XR(i)
      • Q(a);OGATE,XP(B)::QAB(A),XQ(a)
      • R(i);OGATEB::R(H),XR(i)
      • S(d);::B(F),XP(h)
HTML5 logo

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).