MESON Chess Problem Database

Problem Display
PID: 205069 (1Br5/PNnp1q2/8/1BR1p3/K1NkPpp1/1ppP4/4Q3/8 w - - 0 1)

Ulanov, Lev

Zadachi i Etyudi, 1998

1Br5/PNnp1q2/8/1BR1p3/K1NkPpp1/1ppP4/4Q3/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4+
      • 2.Rxc4#
    • 1...Sxb5
      • 2.Bxe5#
    • 1...Sd5
      • 2.Bxe5#
    • 1...Sa6
      • 2.Bxe5#
    • 1...Se6
      • 2.Bxe5#
      • 2.Rd5#
    • 1...Sa8
      • 2.Bxe5#
    • 1...Se8
      • 2.Bxe5#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Sca5?
      • threat
        • 2.Qf2#
      • 1...Qc4+
        • 2.Rxc4#
      • 1...Sxb5
        • 2.Bxe5#
      • 1...Sd5
        • 2.Sxb3#
      • 1...g3!
    • 1.Sba5?
      • threat
        • 2.Sxb3#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Kxc5
        • 2.Sxb3#
        • 2.Qf2#
      • 1...b2
        • 2.Sb3#
      • 1...c2!
    • 1.Rd5+?
      • 1...Sxd5
        • 2.Bxe5#
      • 1...Qxd5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qf2#
      • 1...Qc4+
        • 2.Rxc4#
      • 1...Sxb5
        • 2.Bxe5#
      • 1...Sd5
        • 2.Sxb3#
      • 1...g3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(i);CHECK,OGATE,XS(D)::R1(G),XQ(i)
    • S(g);OGATE,XB(F)::B(J),XP(f)
    • S(g);OGATE::B(J),XP(f)
    • P(d);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB(A)
      • Vars
        • Q(i);CHECK,N_GUARD::R1(G),XQ(i)
        • S(g);OGATE,XB(F)::B(J),XP(f)
        • S(g);S_CUTQ(i)::S(D),XP(a)
      • Refutation
        • P(e);
    • Try
      • S(I);
      • Threat
        • S(I),XP(a)
      • Vars
        • Q(i);CHECK,OGATE,XS(D)::R1(G),XQ(i)
        • P(a);::S(I)
      • Refutation
        • P(b);
    • Try
      • R(G);CHECK
      • Vars
        • S(g);OGATE,XR(G)::B(J),XP(f)
      • Refutation
        • Q(i);XR(G)
  • Actual
    • S(D);
    • Threat
      • QAB(A)
    • Vars
      • Q(i);CHECK,N_GUARD::R1(G),XQ(i)
      • S(g);OGATE,XB(F)::B(J),XP(f)
      • S(g);S_CUTQ(i)::S(D),XP(a)
      • P(e);N_GUARD::S(D)
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).