MESON Chess Problem Database

Problem Display
PID: 109267 (1b6/3R2N1/1nRqp3/1P1B4/3k1p2/1P1pN1p1/1P6/1K2Q3 w - - 0 1)

Rudenko, Valentin Fedorovich

13th Place, 07. WCCT, 2001-2004

1b6/3R2N1/1nRqp3/1P1B4/3k1p2/1P1pN1p1/1P6/1K2Q3

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qc3#
    • 1...exd5
      • 2.Sef5#
    • 1...e5
      • 2.Sgf5#
  • Tries
    • 1.Sc2+?
      • 1...Kxd5
        • 2.Qxe6#
      • 1...dxc2+!
    • 1.Sc4?
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qe5#
      • 1...Qxd5
        • 2.Sxe6#
      • 1...Qxc6
        • 2.Qg1#
      • 1...exd5
        • 2.Sf5#
      • 1...Qe5
        • 2.Qc3#
      • 1...Sxd5!
    • 1.Sef5+?
      • 1...Kxd5
        • 2.Qxe6#
      • 1...exf5!
    • 1.Sgf5+?
      • 1...Ke5
        • 2.Qc3#
      • 1...exf5!
    • 1.Sxe6+?
      • 1...Ke5
        • 2.Qc3#
      • 1...Qxe6!
    • 1.Rc4+?
      • 1...Ke5
        • 2.Qc3#
      • 1...Sxc4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qe5#
      • 1...Qxd5
        • 2.Sxe6#
      • 1...Qxc6
        • 2.Qg1#
      • 1...Sxd5
        • 2.Rc4#
      • 1...exd5
        • 2.Sf5#
      • 1...Qe5
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • K(c);S_FLIGHT::QAB(B)
    • P(g);N_GUARD,SBLOCK,XB(G)::S(E)
    • P(g);N_GUARD,SBLOCK::S(J)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINQ(f),XB(G)::QAB1(B),XP(g)
      • Refutation
        • P(a);CHECK,XS(E)
    • Try
      • S(E);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT,P_SPINQ(f),XB(G)::QAR1(B)
        • Q(f);N_GUARD,P_SPINQ(f),XB(G)::S(J),XP(g)
        • Q(f);XR(H)::QAB(B)
        • P(g);N_GUARD,SBLOCK,XB(G)::S(J)
        • Q(f);::QAB1(B)
      • Refutation
        • S(e);XB(G)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINQ(f),XB(G)::QAB1(B),XP(g)
      • Refutation
        • P(g);XS(E)
    • Try
      • S(J);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • P(g);XS(J)
    • Try
      • S(J);CHECK,XP(g)
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • Q(f);XS(J)
    • Try
      • R(H);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(B)
      • Refutation
        • S(e);XR(H)
  • Actual
    • S(E);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P-FLIGHT,P_SPINQ(f),XB(G)::QAR1(B)
      • Q(f);N_GUARD,P_SPINQ(f),XB(G)::S(J),XP(g)
      • Q(f);XR(H)::QAB(B)
      • S(e);N_GUARD,SBLOCK,XB(G)::R1(H)
      • P(g);N_GUARD,SBLOCK,XB(G)::S(J)
      • Q(f);::QAB1(B)
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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).