MESON Chess Problem Database

Problem Display
PID: 269918 (3B4/P2nrpK1/BNp2p2/1pk1rR2/4Q3/n2R4/3N4/3b2b1 w - - 0 1)

Katsnelson, Leonard Ilich

Shakhmatnaya kompozitsiya, 1997

3B4/P2nrpK1/BNp2p2/1pk1rR2/4Q3/n2R4/3N4/3b2b1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxe7#
    • 1...Rxf5
      • 2.Qxe7#
    • 1...Re6
      • 2.Sxd7#
    • 1...Re8
      • 2.Sxd7#
    • 1...Be2
      • 2.Sb3#
    • 1...Bb3
      • 2.Sxb3#
    • 1...Bf3
      • 2.Sb3#
    • 1...Bg4
      • 2.Sb3#
    • 1...Bh5
      • 2.Sb3#
    • 1...Bh2
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Sc2
      • 2.Sb3#
    • 1...Sxb6
      • 2.Bxe7#
  • Tries
    • 1.Rc3+?
      • 1...Kd6
        • 2.Rxc6#
        • 2.Qxc6#
      • 1...Sc4!
    • 1.Qxc6+?
      • 1...Kb4
        • 2.Qc3#
      • 1...Kxc6!
    • 1.a8S?
      • threat
        • 2.Bxe7#
      • 1...Re6
        • 2.Sxd7#
      • 1...Re8
        • 2.Sxd7#
      • 1...Sc4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Se4#
      • 1...Kb4
        • 2.Se4#
      • 1...Rxf5
        • 2.Qxe7#
      • 1...Sxb6
        • 2.Bxe7#
      • 1...Rd5
        • 2.Qxe7#
      • 1...Bf3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • R(f);OGATE::QAB(C),XR(j)
    • R(f);N_SPINR(f),OGATE,XR(D)::QAB(C),XR(j)
    • R(j);N_GUARD::S(F),XS(i)
    • B(a);N_GUARD::S(A)
    • B(a);N_GUARD::S(A),XB(a)
    • B(b);N_GUARD::QAB1(C)
    • B(b);N_GUARD::QAB1(C),XB(b)
    • S(c);S_CUTB(a)::S(A)
    • S(i);SBLOCK,XS(F)::B(I),XR(j)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(C);CHECK,XP(g)
      • Vars
        • K(e);N_SPINR(f),OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(e);N_SPINR(f),P-FLIGHT,XQ(C)
    • Try
      • P(G);
      • Threat
        • B(I),XR(j)
      • Vars
        • R(j);N_GUARD::S(F),XS(i)
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Threat
      • S(A)
    • Vars
      • K(e);N_SPINR(f),S_FLIGHT::QAB(C)+S(A)
      • R(f);N_SPINR(f),OGATE,XR(D)::QAB(C),XR(j)
      • S(i);SBLOCK,XS(F)::B(I),XR(j)
      • R(f);OGATE::QAB(C),XR(j)
      • B(a);N_GUARD::S(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).