MESON Chess Problem Database

Problem Display
PID: 167106 (5R1b/2K5/1p2kp2/2B1n2p/2P1N2N/2PP4/Q3B3/4R3 w - - 0 1)

Bourd, Evgeny

1st Place, Belgrade QCT, 2016

5R1b/2K5/1p2kp2/2B1n2p/2P1N2N/2PP4/Q3B3/4R3

#2

11 + 6

145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Re8#
    • 1...f5
      • 2.Sg5#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Re8#
      • 1...Ke7
        • 2.Re8#
      • 1...Sxc4
        • 2.Bf3#
      • 1...Sc6
        • 2.Bg4#
      • 1...Sg6
        • 2.Bg4#
      • 1...f5!
    • 1.Bg4+?
      • 1...Sxg4
        • 2.Sg5#
      • 1...f5
        • 2.Sg5#
        • 2.Bxf5#
      • 1...hxg4!
    • 1.Bd6?
      • 1...Sxd3
        • 2.c5#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Sf3
        • 2.c5#
      • 1...Sg4
        • 2.c5#
      • 1...Sc6
        • 2.c5#
      • 1...Sg6
        • 2.c5#
      • 1...Sd7
        • 2.c5#
      • 1...Sf7
        • 2.Re8#
        • 2.c5#
      • 1...b5
        • 2.Sc5#
      • 1...f5
        • 2.Sg5#
      • 1...Bg7!
  • Keys
    • 1.Bxh5!
      • threat
        • 2.Re8#
      • 1...Sxc4
        • 2.Sxf6#
      • 1...Sc6
        • 2.Sg5#
      • 1...Sg6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(a);SBLOCK::R(K)
    • P(e);N_GUARD::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • R(K)
      • Vars
        • K(d);P-FLIGHT::R1(K)
        • S(a);OGATEB,P_SPINS(a),XP(F)::R(A)+B(C)
        • S(a);::R(A)+B(C),DCHECK
      • Refutation
        • P(e);
    • Try
      • B(C);CHECK
      • Vars
        • S(a);XB(C)::R(A)+S(G),DCHECK
      • Refutation
        • P(b);XB(C)
    • Try
      • B(I);
      • Vars
        • S(a);N_GUARD,XP(E)::QAB(B)+P(F)
        • S(a);OGATE,P_SPINS(a),XP(F)::QAB(B),XS(a)
        • S(a);N_GUARD::QAB(B)+P(F)
        • P(c);N_GUARD::S(G)
        • P(e);N_GUARD::S(G)
      • Refutation
        • B(f);
  • Actual
    • B(C);XP(b)
    • Threat
      • R(K)
    • Vars
      • S(a);P_SPINS(a),XP(F)::R(A)+S(G),XP(e)
      • S(a);::R(A)+S(G),DCHECK
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).