MESON Chess Problem Database

Problem Display
PID: 184803 (3K2n1/5p2/5Nr1/2Ppk1p1/R2b2B1/4p3/4Q3/5n2 w - - 0 1)

Jewetsky, Feodor Orestovich

125 Shakhmaty Zadachi (Eventski), 1908

3K2n1/5p2/5Nr1/2Ppk1p1/R2b2B1/4p3/4Q3/5n2

#2

6 + 9

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Sd7#
    • 1...Bb2
      • 2.Sd7#
    • 1...Bc3
      • 2.Sd7#
  • Tries
    • 1.Sd7+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Ke4!
    • 1.Qxe3+?
      • 1...Kxf6
        • 2.Qxd4#
      • 1...Bxe3
        • 2.Sd7#
      • 1...Sxe3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qxd4#
      • 1...Bxb2
        • 2.Sd7#
      • 1...Bc3
        • 2.Sd7#

Anticipated by 68904(1882)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);N_SPINP(b),P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • K(e);P-FLIGHT,P_SPINB(c)
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(e);S_FLIGHT,XS(E)::QAB(A),XB(c)
        • B(c);XQ(A)::S(E)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);N_PINP(b),P_PINB(c)
    • Threat
      • QAB1(A),XB(c)
    • Vars
      • K(e);S_FLIGHT::QAB(A)
      • K(e);S_FLIGHT,XS(E)::QAB(A),XB(c)
      • B(c);N_SPINB(c),XQ(A)::S(E)
      • B(c);::S(E)
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).