MESON Chess Problem Database

Problem Display
PID: 177926 (B2K1B2/8/4b3/2PppP2/2Pk4/p3N1R1/r1RNPp2/bQ6 w - - 0 1)

Erokhin, Vladimir Alekseevich

5th Prize, Sahs (Latvia), 1988

B2K1B2/8/4b3/2PppP2/2Pk4/p3N1R1/r1RNPp2/bQ6

#2

12 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Sxc2#
    • 1...Bxf5
      • 2.Sxf5#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Rd3#
      • 1...dxc4
        • 2.Sf3#
      • 1...e4
        • 2.Sb3#
      • 1...Bxf5!
    • 1.Rxa2?
      • threat
        • 2.Sc2#
        • 2.Qd3#
        • 2.Qxa1#
      • 1...Bxf5
        • 2.Sxf5#
        • 2.Qxa1#
      • 1...dxc4
        • 2.Sc2#
      • 1...e4
        • 2.Qxa1#
      • 1...f1Q
        • 2.Sc2#
        • 2.Qd3#
      • 1...f1R
        • 2.Sc2#
        • 2.Qd3#
      • 1...Bb2
        • 2.Sc2#
        • 2.Qd3#
      • 1...Bc3
        • 2.Sb3#
        • 2.Sc2#
        • 2.Qd3#
      • 1...Kc3!
    • 1.Rg4+?
      • 1...Kxe3
        • 2.Sf1#
      • 1...e4!
    • 1.Qh1?
      • threat
        • 2.Sb3#
      • 1...Rxc2
        • 2.Sxc2#
      • 1...dxc4
        • 2.Qe4#
      • 1...e4
        • 2.Qh8#
      • 1...Rb2!
    • 1.Qb3?
      • threat
        • 2.Qd3#
      • 1...Bxf5
        • 2.Sxf5#
      • 1...dxc4
        • 2.Sf3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...e4!
    • 1.Qb6?
      • threat
        • 2.c6#
      • 1...Rxc2
        • 2.Sxc2#
      • 1...e4
        • 2.Bg7#
      • 1...Rb2!
  • Keys
    • 1.Qb4!
      • threat
        • 2.cxd5#
      • 1...Rxc2
        • 2.Sxc2#
      • 1...dxc4
        • 2.Sb3#
      • 1...e4
        • 2.Bg7#
      • 1...Rb2
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);XR(B)::S(E),XR(b)
    • B(h);XP(I)::S(E),XB(h)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(F)
      • Vars
        • P(f);XP(G)::S(C)
        • P(g);SBLOCK::S(C)
      • Refutation
        • B(h);XP(I)
    • Try
      • R(B);XR(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);XP(G)::S(E)
        • P(g);::QAB(A),XB(a)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(E)::S(C)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • R(b);XR(B)::S(E),XR(b)
        • P(f);N_GUARD,XP(G)::QAR1(A)
        • P(g);OGATEB::QAB(A)
      • Refutation
        • R(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(h);XP(I)::S(E),XB(h)
        • P(f);XP(G)::S(C)
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • P(g);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+P(H)
      • Vars
        • R(b);XR(B)::S(E),XR(b)
        • P(g);OGATEB::B(L)
      • Refutation
        • R(b);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+P(G),XP(f)
    • Vars
      • R(b);XR(B)::S(E),XR(b)
      • P(f);P_SPINP(f),XP(G)::S(C)
      • P(g);OGATEB::B(L)
      • R(b);S_CUTB(a)::QAB1(A)
      • B(a);N_GUARD::QAB1(A),XB(a)
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).