MESON Chess Problem Database

Problem Display
PID: 180063 (4Q3/3n3r/1PRp1P2/1pPk1q2/3PNb2/7B/1N2nB2/K3R3 w - - 0 1)

Avner, Uri

2nd Prize, Spisska Borovicka 03. Ty., 1991

4Q3/3n3r/1PRp1P2/1pPk1q2/3PNb2/7B/1N2nB2/K3R3

#2

12 + 8

721 Variantim 1993
17424 Close Encounters with the Chess Pieces (Avner) 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qa8#
    • 1...Bc1
      • 2.Rxd6#
    • 1...Bd2
      • 2.Rxd6#
    • 1...Be3
      • 2.Rxd6#
    • 1...Bg5
      • 2.Rxd6#
    • 1...Bh6
      • 2.Rxd6#
  • Tries
    • 1.Sc3+?
      • 1...Kxc6
        • 2.Qa8#
        • 2.Qc8#
      • 1...Sxc3!
    • 1.Bg2?
      • threat
        • 2.Sc3#
      • 1...Kxc6
        • 2.Qa8#
      • 1...Qxe4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Be3
        • 2.Rxd6#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Re7!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Rxd6#
      • 1...Kxe4
        • 2.Bg2#
      • 1...Ke6
        • 2.Qa2#
      • 1...Sxd4
        • 2.Sc3#
      • 1...dxc5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(d);OGATEB,P_SPINS(g),S_FLIGHT,XR(J)::QAB(L)
    • B(b);N_GUARD::R1(J),XP(f)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XS(G)
    • Try
      • B(E);
      • Threat
        • B(E)+S(G),DCHECK
      • Vars
        • K(d);OGATEB,P_SPINS(g),S_FLIGHT,XR(J)::QAB(L)
        • B(b);N_GUARD::R1(J),XP(f)
        • S(a);::B(E)+S(G),DCHECK,XS(a)
      • Refutation
        • R(h);
  • Actual
    • Q(L);
    • Threat
      • QAB(L)+R(J),DCHECK,XP(f)
    • Vars
      • K(d);OGATEB,P_SPINS(a),S_FLIGHT,XS(G)::B(E)
      • K(d);P_SPINP(f),P_SPINQ(e),S_FLIGHT::QAB(L)
      • S(a);N_GUARD,XP(F)::S(G)
      • P(f);XP(H)::QAB(L)+R(J),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).