MESON Chess Problem Database

Problem Display
PID: 275394 (4k3/1NK3RN/8/8/1ppPnp2/1q4p1/4r3/3BrRQ1 w - - 0 1)

Comay, Ofer

Shtern, David

Variantim, 2023

4k3/1NK3RN/8/8/1ppPnp2/1q4p1/4r3/3BrRQ1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Bxa4#
    • 1...Qb1
      • 2.Ba4#
    • 1...Qb2
      • 2.Ba4#
    • 1...Qc3
      • 2.Ba4#
    • 1...Qd3
      • 2.Ba4#
    • 1...Qe3
      • 2.Ba4#
    • 1...Qf3
      • 2.Ba4#
    • 1...Ra2
      • 2.Bh5#
    • 1...Rb2
      • 2.Bh5#
    • 1...Rc2
      • 2.Bh5#
    • 1...Rd2
      • 2.Bh5#
    • 1...Rf2
      • 2.Bh5#
    • 1...Rg2
      • 2.Bh5#
    • 1...Re3
      • 2.Bh5#
    • 1...Sd2
      • 2.Sd6#
    • 1...Sf2
      • 2.Sd6#
    • 1...Sc3
      • 2.Sd6#
    • 1...Sc5
      • 2.Sd6#
    • 1...Sg5
      • 2.Sd6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sf6
      • 2.Sd6#
  • Tries
    • 1.Rxf4?
      • threat
        • 2.Rf8#
      • 1...Qf3
        • 2.Ba4#
      • 1...Rf2
        • 2.Bh5#
      • 1...Sf6
        • 2.Sd6#
      • 1...Rf1!
    • 1.Qxg3?
      • threat
        • 2.Qg6#
      • 1...Qxg3
        • 2.Ba4#
      • 1...Sxg3
        • 2.Sd6#
      • 1...fxg3
        • 2.Rf8#
      • 1...Rg2
        • 2.Bh5#
      • 1...Sg5
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...c3!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sd6#
      • 1...Qxe3
        • 2.Ba4#
      • 1...Rxe3
        • 2.Bh5#
      • 1...fxe3
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 19
  • Sets
    • Q(c);OGATE::B(A),XQ(c)
    • Q(c);OGATE::B(A)
    • R(b);OGATE::B(A)
    • S(g);N_GUARD::S(E)
    • S(g);N_GUARD::S(E),XS(g)
  • Tries
    • Try
      • R(B);XP(h)
      • Threat
        • R1(B)
      • Vars
        • Q(c);OGATE::B(A)
        • R(b);OGATE::B(A)
        • S(g);N_GUARD::S(E)
      • Refutation
        • R(a);
    • Try
      • Q(C);XP(d)
      • Threat
        • QAB(C)
      • Vars
        • Q(c);OGATE,XQ(C)::B(A)
        • S(g);N_GUARD,XQ(C)::S(E)
        • P(h);OGATE,XQ(C)::R1(B)
        • R(b);OGATE::B(A)
        • S(g);N_GUARD::S(E)
        • S(g);N_GUARD::S(E),XS(g)
      • Refutation
        • P(f);
  • Actual
    • Q(C);P_PINS(g)
    • Threat
      • S(E)
    • Vars
      • Q(c);N_SPINS(g),OGATE,XQ(C)::B(A)
      • R(b);N_SPINS(g),OGATE,XQ(C)::B(A)
      • P(h);N_SPINS(g),OGATE,XQ(C)::R1(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).