MESON Chess Problem Database

Problem Display
PID: 164594 (3R3q/5R1r/p2pp3/P1k5/P1pN4/2K1PB2/3Q4/1b6 w - - 0 1)

Valters, N

Sachmatija, 2007

3R3q/5R1r/p2pp3/P1k5/P1pN4/2K1PB2/3Q4/1b6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4+
      • 2.Qxd4#
      • 2.exd4#
    • 1...Qe5
      • 2.Rc8#
    • 1...Qf6
      • 2.Rc8#
    • 1...Qg7
      • 2.Rc8#
    • 1...Qxd8
      • 2.Sxe6#
    • 1...Qf8
      • 2.Sxe6#
    • 1...Qg8
      • 2.Sxe6#
    • 1...Rh1
      • 2.Rc7#
    • 1...Rh2
      • 2.Rc7#
    • 1...Rh3
      • 2.Rc7#
    • 1...Rh4
      • 2.Rc7#
    • 1...Rh5
      • 2.Rc7#
    • 1...Rh6
      • 2.Rc7#
    • 1...Rg7
      • 2.Sxe6#
    • 1...e5
      • 2.Se6#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qa3#
      • 1...Qxd4+
        • 2.exd4#
      • 1...Be4!
    • 1.Qa2?
      • threat
        • 2.Qxc4#
        • 2.Qa3#
      • 1...Qxd4+
        • 2.exd4#
      • 1...Be4
        • 2.Qxc4#
      • 1...Bd3
        • 2.Qa3#
      • 1...d5
        • 2.Qa3#
      • 1...Bxa2!
    • 1.Qb2?
      • threat
        • 2.Qa3#
        • 2.Qb4#
        • 2.Qb6#
      • 1...Qxd4+
        • 2.exd4#
      • 1...Qxd8
        • 2.Sxe6#
        • 2.Qa3#
        • 2.Qb4#
      • 1...Be4!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxd6#
      • 1...Qxd4+
        • 2.exd4#
      • 1...Qxd8
        • 2.Sxe6#
      • 1...Rxh2
        • 2.Rc7#
      • 1...Qe5
        • 2.Rc8#
      • 1...Qf8
        • 2.Sxe6#
      • 1...d5
        • 2.Qd6#
        • 2.Qc7#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(h);N_GUARD::R(I)
    • Q(h);N_PINS(F),XR(I)::S(F),XP(f)
    • Q(h);N_PINS(F)::S(F),XP(f)
    • R(g);N_GUARD::R(H)
    • R(g);N_PINS(F)::S(F),XP(f)
    • P(f);N_PINS(F)::S(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(h);CHECK,OGATE,XS(F)::P(C),XQ(h)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,OGATE,XS(F)::P(C),XQ(h)
        • B(a);::QAR1(A),XP(b)
        • B(a);::QAB(A)
        • P(e);::QAB(A)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(h);CHECK,OGATE,XS(F)::P(C),XQ(h)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(e)
    • Vars
      • Q(h);CHECK,OGATE,XS(F)::P(C),XQ(h)
      • Q(h);N_PINS(F),XR(I)::S(F),XP(f)
      • R(g);N_GUARD,XQ(A)::R(H)
      • Q(h);N_GUARD::R(I)
      • Q(h);N_PINS(F)::S(F),XP(f)
      • P(f);N_PINS(F)::S(F)
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).