MESON Chess Problem Database

Problem Display
PID: 157701 (q2R2B1/p3B1p1/1b6/2ppk1N1/6P1/4ppP1/2K5/1Q6 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2008

q2R2B1/p3B1p1/1b6/2ppk1N1/6P1/4ppP1/2K5/1Q6

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb8
      • 2.Rxd5#
    • 1...Qc8
      • 2.Rxd5#
  • Tries
    • 1.Kc1?
      • threat
        • 2.Sxf3#
      • 1...f2
        • 2.Sf3#
      • 1...d4
        • 2.Qf5#
      • 1...Kd4!
    • 1.Kb3?
      • threat
        • 2.Sxf3#
      • 1...Kd4
        • 2.Sxf3#
        • 2.Qe4#
      • 1...f2
        • 2.Sf3#
      • 1...d4
        • 2.Qf5#
      • 1...c4+!
    • 1.Qb3?
      • threat
        • 2.Qxe3#
      • 1...Kd4
        • 2.Qc3#
      • 1...d4
        • 2.Qe6#
      • 1...e2
        • 2.Qe3#
      • 1...c4!
  • Keys
    • 1.Kb2!
      • threat
        • 2.Sxf3#
      • 1...Kd4
        • 2.Qe4#
      • 1...f2
        • 2.Sf3#
      • 1...d4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(i);N_GUARD::R1(G),XP(d)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • S(E),XP(b)
      • Vars
        • P(b);::S(E)
        • P(d);::QAR1(A)
      • Refutation
        • K(e);P_SPINP(d),S_FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Threat
        • S(E),XP(b)
      • Vars
        • P(b);::S(E)
        • P(d);::QAR1(A)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XP(a)
      • Vars
        • K(e);P_SPINP(d),S_FLIGHT::QAB1(A)
        • P(d);OGATE::QAR1(A)
        • P(a);::QAR2(A)
      • Refutation
        • P(c);
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • S(E),XP(b)
    • Vars
      • K(e);P_SPINP(d),S_FLIGHT::QAR1(A)
      • P(b);::S(E)
      • P(d);::QAR1(A)
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).