MESON Chess Problem Database

Problem Display
PID: 273342 (3R2B1/8/3N4/q4p2/2PNP3/Rp1k3K/2pPp3/2rbB2Q w - - 0 1)

Evdokimov, Valery Antolovich

Springaren, 1990

3R2B1/8/3N4/q4p2/2PNP3/Rp1k3K/2pPp3/2rbB2Q

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qxe4#
  • Tries
    • 1.S4xf5?
      • threat
        • 2.Qf3#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qxd2
        • 2.Sb5#
      • 1...Qc5
        • 2.Rxb3#
      • 1...Qa7
        • 2.Rxb3#
      • 1...Qb6!
    • 1.S6b5?
      • threat
        • 2.Qf3#
      • 1...Qxd2
        • 2.Sxf5#
      • 1...fxe4!
    • 1.S6xf5?
      • threat
        • 2.Qf3#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qxd2
        • 2.Sb5#
      • 1...Qd5!
  • Keys
    • 1.S4b5!
      • threat
        • 2.Qf3#
      • 1...Qxd2
        • 2.Sxf5#
      • 1...Qxb5
        • 2.Sxb5#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Qb6
        • 2.Rxb3#
      • 1...Qa7
        • 2.Rxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(h);OGATE,XP(H)::QAB1(B),XP(h)
  • Tries
    • Try
      • S(G);XP(h)
      • Threat
        • QAR2(B)
      • Vars
        • Q(g);CHECK,XS(G)::R(J)+S(I),XQ(g)
        • Q(g);N_GUARD,XP(C)::R(J)+S(I)
        • Q(g);N_GUARD::R(D),XP(e)
      • Refutation
        • Q(g);
    • Try
      • S(I);
      • Threat
        • QAR2(B)
      • Vars
        • Q(g);N_GUARD,XP(C)::R(J)+S(G),XP(h)
      • Refutation
        • P(h);XP(H)
    • Try
      • S(I);XP(h)
      • Threat
        • QAR2(B)
      • Vars
        • Q(g);CHECK,XS(I)::R(J)+S(G),XQ(g)
        • Q(g);N_GUARD,XP(C)::R(J)+S(G)
      • Refutation
        • Q(g);
  • Actual
    • S(G);
    • Threat
      • QAR2(B)
    • Vars
      • Q(g);N_GUARD,XP(C)::R(J)+S(I),XP(h)
      • Q(g);XS(G)::R(J)+S(I),XQ(g)
      • P(h);OGATE,XP(H)::QAB1(B),XP(h)
      • Q(g);N_GUARD::R(D),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).