MESON Chess Problem Database

Problem Display
PID: 174959 (7B/3p2rB/KN4Q1/5N1p/2P1k2p/7P/2P3P1/8 w - - 0 1)

Stepanov, AS

Rigaer Tageblatt, 1901

7B/3p2rB/KN4Q1/5N1p/2P1k2p/7P/2P3P1/8

#2

10 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qe8+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Re7!
    • 1.Qd6?
      • threat
        • 2.Qd4#
      • 1...Rxh7
        • 2.Qe5#
      • 1...Rg6
        • 2.Qe5#
      • 1...Rxg2!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qe3#
      • 1...dxe6!
    • 1.Qxg7?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...d6
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Sd5!
      • 1...Rxg6+
        • 2.Sd6#
      • 1...Ke5
        • 2.Qe8#
      • 1...Rxh7
        • 2.Sfe3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sxh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Sfe7#
      • 1...Re7
        • 2.Sfe3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sxh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Sfxe7#
      • 1...Rf7
        • 2.Sg3#
        • 2.Sd6#
      • 1...Rg8
        • 2.Sg3#
        • 2.Sd6#
      • 1...d6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(H)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • R(e);XB(I)::QAR1(H)
        • R(e);::QAR1(H)
      • Refutation
        • R(e);XP(B)
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(H)
      • Refutation
        • P(d);XQ(H)
    • Try
      • Q(H);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR1(H)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(G);
    • Vars
      • R(e);CHECK,XQ(H)::S(E)
      • K(a);P-FLIGHT,P_SPINR(e)::QAR(H)
      • P(d);N_GUARD::QAR2(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).