MESON Chess Problem Database

Problem Display
PID: 123253 (4b3/2n1Q1n1/3pp2r/1p2k1Np/7N/1K2P3/7R/6BB w - - 0 1)

Antonov, Yuri Mikhailovich

Source?, 1981

4b3/2n1Q1n1/3pp2r/1p2k1Np/7N/1K2P3/7R/6BB

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh8
      • 2.Qxg7#
    • 1...Bc6
      • 2.Sf7#
    • 1...Bg6
      • 2.Qxg7#
    • 1...Bd7
      • 2.Sf7#
    • 1...Bf7
      • 2.Sxf7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qxd6#
      • 1...Kd5
        • 2.Qxd6#
      • 1...d5
        • 2.Qd6#
        • 2.Qxc7#
      • 1...Sf5!
    • 1.Rf2?
      • threat
        • 2.Bh2#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sd5!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Bh2#
      • 1...Rf6
        • 2.Qxd6#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sf5
        • 2.Shf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::QAB(H),XS(h)
    • B(i);N_GUARD::S(G)
    • B(i);S_CUTR(f)::QAB(H),XS(h)
    • B(i);N_GUARD::S(G),XB(i)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB1(H),XP(d)
      • Vars
        • K(b);N_SPINP(e),P-FLIGHT::QAR1(H),XP(d)
      • Refutation
        • S(h);
    • Try
      • R(C);
      • Threat
        • B(A)
      • Vars
        • R(f);N_GUARD::QAB1(H),XR(f)
        • S(h);N_GUARD::R1(C),XS(h)
      • Refutation
        • S(g);
  • Actual
    • R(C);
    • Threat
      • B(A)
    • Vars
      • R(f);SBLOCK::QAB1(H),XP(d)
      • S(g);N_GUARD::R1(C),XS(g)
      • S(h);SBLOCK::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).