MESON Chess Problem Database

Problem Display
PID: 173104 (1N6/2pR1n2/7r/Bpk1qQp1/5PPp/1bP4K/1P6/2R2B2 w - - 0 1)

Barulin, Mikhail Mikhailovich

3rd HM., Shakhmaty, 1929

1N6/2pR1n2/7r/Bpk1qQp1/5PPp/1bP4K/1P6/2R2B2

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Bb4#
    • 1...Bd1
      • 2.b4#
    • 1...Ba2
      • 2.b4#
    • 1...Bc2
      • 2.b4#
    • 1...Ba4
      • 2.b4#
    • 1...Bc4
      • 2.b4#
    • 1...Bd5
      • 2.b4#
    • 1...Be6
      • 2.b4#
    • 1...b4
      • 2.cxb4#
    • 1...c6
      • 2.Sa6#
  • Tries
    • 1.Qxe5+?
      • 1...Bd5
        • 2.Rxd5#
        • 2.Qd4#
        • 2.Qe3#
        • 2.Qxd5#
        • 2.b4#
      • 1...Sxe5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxb5#
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Qxc3
        • 2.Qe3#
      • 1...Qe2
        • 2.Qd4#
      • 1...Rb6
        • 2.Bb4#
      • 1...Ba4
        • 2.b4#
      • 1...Bc4
        • 2.b4#
      • 1...Sd6
        • 2.Rxc7#
      • 1...b4
        • 2.Qb5#
        • 2.cxb4#
      • 1...c6
        • 2.Sa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(g);SBLOCK::B(H)
    • B(a);OGATE::P(C)
    • B(a);N_SPINQ(e),OGATE::P(C)
    • P(c);OGATE::R(A)+P(D)DCHECK,XP(c)
    • P(h);SBLOCK,S_CUTR(g)::S(K)
  • Tries
    • Try
      • Q(I);CHECK,XQ(e)
      • Refutation
        • S(i);XQ(I)
  • Actual
    • Q(I);N_PINQ(e)
    • Threat
      • QAR1(I),XP(c)
    • Vars
      • Q(e);CHECK,N_GUARD::QAB(I),XQ(e)
      • Q(e);N_GUARD,P_PINQ(I),P_SPINQ(e),XP(D)::QAB(I)
      • Q(e);N_GUARD::QAB1(I)
      • R(g);SBLOCK::B(H)
      • B(a);OGATE::P(C)
      • S(i);S_CUTQ(e),S_CUTR(g)::R(J),XP(h)
      • P(h);SBLOCK,S_CUTR(g)::S(K)
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).