MESON Chess Problem Database

Problem Display
PID: 15743 (8/1N1r3q/2p2p2/KBQP1r1R/2p1k1P1/5N2/b1P1nR2/2B3n1 w - - 0 1)

Rychkov, Vladimir Nikolaevich

1st HM., Probleemblad, 1987

8/1N1r3q/2p2p2/KBQP1r1R/2p1k1P1/5N2/b1P1nR2/2B3n1

#2

11 + 10

721 Variantim 1990
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sd2#
      • 2.Qe3#
    • 1...Rfxd5
      • 2.Qe3#
    • 1...Re5
      • 2.Sd2#
    • 1...Rdxd5
      • 2.Qe3#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rc7
      • 2.Sd6#
    • 1...Re7
      • 2.Sd6#
    • 1...Rf7
      • 2.Sd6#
    • 1...Rg7
      • 2.Sd6#
    • 1...Sxf3
      • 2.Rxe2#
    • 1...Sxc1
      • 2.Qd4#
    • 1...Sc3
      • 2.Qd4#
    • 1...Sg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sf4
      • 2.Qd4#
    • 1...c3
      • 2.Bd3#
    • 1...cxd5
      • 2.Qe3#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Qe3#
      • 1...Rxf3
        • 2.d6#
      • 1...Rfxd5
        • 2.Sd2#
      • 1...Rdxd5
        • 2.Sd6#
      • 1...Sxc1
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qh6!
    • 1.Qxc4+?
      • 1...Sd4
        • 2.Sc5#
        • 2.Qxd4#
      • 1...Bxc4!
  • Keys
    • 1.d6!
      • threat
        • 2.Sd2#
      • 1...Rxf3
        • 2.Bxc6#
      • 1...Rxc5
        • 2.Sxc5#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Sxf3
        • 2.Rxe2#
      • 1...Qh6
        • 2.Qxf5#
      • 1...Rd5
        • 2.Qe3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...c3
        • 2.Bd3#

This anticipates 75484(2007)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • R(f);XP(I)::QAR1(H)
    • R(f);::S(D)
    • R(i);SBLOCK,XP(I)::QAR1(H)
    • R(i);N_GUARD::S(K),XR(i)
    • R(i);N_GUARD::S(K)
    • S(a);N_GUARD,SBLOCK,XS(D)::R(C),XS(c)
    • S(c);N_GUARD,XB(A)::QAR1(H)
    • S(c);N_GUARD::QAR1(H)
    • S(c);N_GUARD::QAR1(H),XS(c)
    • P(d);OGATE::B(G)
    • P(g);SBLOCK,XP(I)::QAR1(H)
  • Tries
    • Try
      • B(G);XP(g)
      • Threat
        • QAR1(H)
      • Vars
        • R(f);N_GUARD,XS(D)::B(G)+P(I)
        • R(f);P_PINQ(H),P_SPINR(f),XP(I)::S(D)
        • R(i);N_GUARD,P_PINQ(H),P_SPINR(i),XP(I)::S(K)
        • S(c);N_GUARD,XB(A)::QAR1(H)
        • S(c);N_GUARD::QAR1(H),XS(c)
      • Refutation
        • Q(j);
    • Try
      • Q(H);CHECK,XP(d)
      • Refutation
        • B(b);XQ(H)
  • Actual
    • P(I);
    • Threat
      • S(D)
    • Vars
      • R(f);N_GUARD,XS(D)::B(G),XP(g)
      • R(f);P_PINB(G),XQ(H)::S(K),XR(f)
      • R(i);XP(I)::S(K),XR(i)
      • S(a);N_GUARD,SBLOCK,XS(D)::R(C),XS(c)
      • Q(j);N_GUARD::QAB1(H),XR(f)
      • R(f);::QAR1(H)
      • S(c);N_GUARD::QAR1(H),XS(c)
      • P(d);OGATE::B(G)
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).