MESON Chess Problem Database

Problem Display
PID: 237769 (1BB2NQ1/6P1/5p2/Rb1P1PnR/p1p1k1p1/4p3/2K1N1P1/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

Shakhmaty v SSSR, 1981

1BB2NQ1/6P1/5p2/Rb1P1PnR/p1p1k1p1/4p3/2K1N1P1/8

#2

12 + 8

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sh7
      • 2.Qe6#
    • 1...g3
      • 2.Rh4#
  • Tries
    • 1.Kc3?
      • threat
        • 2.Sg3#
      • 1...Se6
        • 2.Qxe6#
      • 1...g3
        • 2.Sxg3#
        • 2.Rh4#
      • 1...Sf7!
    • 1.Sd7?
      • threat
        • 2.Sc5#
        • 2.Sxf6#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Se6
        • 2.Sxf6#
        • 2.Qxe6#
      • 1...Sf7
        • 2.Sxf6#
      • 1...Sh7
        • 2.Sc5#
        • 2.Qe6#
      • 1...Bxd7!
    • 1.Sh7?
      • threat
        • 2.Sxf6#
      • 1...Sxh7
        • 2.Qe6#
      • 1...Bd7!
    • 1.Rxg5?
      • threat
        • 2.Rxg4#
        • 2.Qe6#
      • 1...fxg5
        • 2.Qe6#
      • 1...g3
        • 2.Rg4#
        • 2.Qe6#
      • 1...Bd7!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sc5#
      • 1...Kxd5
        • 2.Bb7#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Bd7
        • 2.Sg3#
      • 1...Sf7
        • 2.Sc3#

Anticipated by 108716(1981)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(g);N_GUARD::QAR2(L)
    • S(g);N_GUARD::QAR2(L),XS(g)
    • P(e);OGATEB::R(G)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • S(B)
      • Vars
        • S(g);N_GUARD::QAR2(L),XS(g)
      • Refutation
        • S(g);
    • Try
      • S(K);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);OGATEB,P_SPINS(g),S_FLIGHT,XP(F)::QAB(L)
        • S(g);::S(K),XP(h)
      • Refutation
        • B(f);XS(K)
    • Try
      • S(K);
      • Threat
        • S(K),XP(h)
      • Vars
        • S(g);N_GUARD,XS(K)::QAR2(L)
      • Refutation
        • B(f);
    • Try
      • R(G);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XR(G)::QAR2(L)
      • Refutation
        • B(f);
  • Actual
    • S(K);
    • Threat
      • S(K)
    • Vars
      • K(d);OGATEB,P_SPINB(f),S_FLIGHT,XP(E)::B(J)
      • K(d);OGATEB,P_SPINS(g),S_FLIGHT,XP(F)::QAB(L)
      • S(g);OGATE,XS(K)::QAR2(L),XS(g)
      • B(f);::S(B)
      • S(g);::S(B)
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).