MESON Chess Problem Database

Problem Display
PID: 232683 (5N1K/Q1B1p3/3nP3/1r2knRN/1P1p3P/4p3/1ppr4/3R3B w - - 0 1)

Erokhin, Vladimir Alekseevich

Freie Presse, 1988

5N1K/Q1B1p3/3nP3/1r2knRN/1P1p3P/4p3/1ppr4/3R3B

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Qxd4#
    • 1...Rf2
      • 2.Qxd4#
    • 1...Rg2
      • 2.Qxd4#
    • 1...Rh2
      • 2.Qxd4#
    • 1...Rxb4
      • 2.Qc5#
    • 1...Ra5
      • 2.Qxa5#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rb7
      • 2.Qc5#
    • 1...Rb8
      • 2.Qc5#
    • 1...d3
      • 2.Qxe3#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Rxf5#
      • 1...Kf4
        • 2.Sg6#
      • 1...Rf2
        • 2.Qxd4#
      • 1...Kf6!
    • 1.Bxd6+?
      • 1...exd6
        • 2.Qg7#
      • 1...Kxd6!
    • 1.Qa2?
      • threat
        • 2.Sg6#
        • 2.Sd7#
      • 1...d3
        • 2.Qxb2#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rb8
        • 2.Qd5#
      • 1...Rg2!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Rxf5#
      • 1...Kf4
        • 2.Sg6#
      • 1...Kf6
        • 2.Sd7#
      • 1...Rg2
        • 2.Qxd4#
      • 1...Rf2
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::QAB1(H),XP(e)
    • R(f);N_GUARD,XP(C)::QAR2(H)
    • R(f);OGATEB::QAR(H),XR(f)
    • R(f);N_GUARD::QAR2(H),XR(f)
    • R(f);N_GUARD::QAR2(H)
    • R(f);N_GUARD,P_PINS(J)::QAR2(H)
    • P(e);OGATE::QAR2(H),XP(d)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(E),XS(h)
      • Vars
        • K(g);N_SPINS(h),P_SPINS(i),S_FLIGHT::S(J)
        • R(c);N_GUARD::QAB1(H),XP(e)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT
    • Try
      • B(I);CHECK,XS(i)
      • Vars
        • P(j);OGATE,SBLOCK,XB(I)::QAB(H)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT,XB(I)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);OGATEB::QAB(H),XP(a)
        • R(f);N_GUARD::QAR1(H),XR(f)
        • R(f);N_GUARD,P_PINS(J)::QAR1(H)
      • Refutation
        • R(c);
  • Actual
    • S(F);
    • Threat
      • R1(E),XS(h)
    • Vars
      • K(g);N_SPINS(h),P_SPINS(i),S_FLIGHT::S(J)
      • K(g);N_SPINS(h),S_FLIGHT::S(J)
      • R(c);N_GUARD::QAB1(H),XP(e)
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).