MESON Chess Problem Database

Problem Display
PID: 39625 (4n3/Kpn2Q2/2p5/Nk1N4/p2P3b/PbB3P1/4R3/8 w - - 0 1)

Mosiashvili, Givi

StrateGems, 2001

4n3/Kpn2Q2/2p5/Nk1N4/p2P3b/PbB3P1/4R3/8

#2

9 + 8

145 StrateGems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Qxb7#
    • 1...Se6
      • 2.Qxb7#
    • 1...Sd6
      • 2.Sxc7#
    • 1...Sf6
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sxc7#
    • 1...cxd5
      • 2.Qd7#
    • 1...c5
      • 2.Qd7#
  • Tries
    • 1.Rb2?
      • threat
        • 2.Qf1#
      • 1...Sd6
        • 2.Sxc7#
      • 1...Sf6
        • 2.Sxc7#
      • 1...c5
        • 2.Qd7#
      • 1...Bf6!
    • 1.Qf1?
      • threat
        • 2.Rb2#
      • 1...Bc2
        • 2.Rxc2#
      • 1...Sd6
        • 2.Sxc7#
      • 1...c5!
    • 1.Qf5?
      • threat
        • 2.Sxc7#
      • 1...Bxd5
        • 2.Rb2#
      • 1...cxd5
        • 2.Qd7#
      • 1...Sa6
        • 2.Sc7#
      • 1...Se6
        • 2.Sc7#
      • 1...Sa8
        • 2.Sc7#
      • 1...c5
        • 2.Qd7#
      • 1...Sxd5!
    • 1.Qxc7?
      • threat
        • 2.Qb6#
        • 2.Qxb7#
      • 1...Sxc7
        • 2.Sxc7#
      • 1...Sd6
        • 2.Qb6#
      • 1...b6
        • 2.Qxb6#
        • 2.Qxc6#
      • 1...Bd8!
    • 1.Qe7?
      • threat
        • 2.Qb4#
        • 2.Qc5#
      • 1...Sxd5
        • 2.Qc5#
      • 1...Sa6
        • 2.Qxb7#
      • 1...Se6
        • 2.Qb4#
        • 2.Qxb7#
      • 1...Sd6
        • 2.Sxc7#
      • 1...c5
        • 2.Qxc5#
        • 2.Qd7#
      • 1...b6
        • 2.Qb4#
      • 1...Bxe7!
  • Keys
    • 1.Re5!
      • threat
        • 2.Sxc7#
      • 1...Bxd5
        • 2.Qf1#
      • 1...Sxd5
        • 2.Qxb7#
      • 1...cxd5
        • 2.Qd7#
      • 1...Sa6
        • 2.Sc7#
        • 2.Qxb7#
      • 1...Se6
        • 2.Sc7#
        • 2.Qxb7#
      • 1...Sa8
        • 2.Sc7#
      • 1...c5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(g);OGATE::QAR2(I),XP(f)
    • S(h);N_GUARD::S(G),XS(g)
    • P(e);OGATEB,XS(G)::QAB(I)
    • P(e);OGATEB::QAB(I)
  • Tries
    • Try
      • R(A);P_PINB(a)
      • Threat
        • QAB(I)
      • Vars
        • S(h);N_GUARD::S(G),XS(g)
        • P(e);OGATEB::QAB(I)
      • Refutation
        • B(c);
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(A)
      • Vars
        • B(a);N_GUARD::QAB(I)+R(A),XB(a)
        • S(h);N_GUARD::S(G),XS(g)
      • Refutation
        • P(e);
    • Try
      • Q(I);
      • Threat
        • QAR(I)+S(G),DCHECK,XS(g)
      • Vars
        • B(a);OGATEB,P_SPINB(a),XS(G)::R(A)
        • P(e);OGATEB,P_SPINP(e),XS(G)::QAB(I)
        • S(g);::QAR(I)+S(G),DCHECK
        • P(e);OGATEB::QAB(I)
      • Refutation
        • S(g);P_SPINS(g),XS(G)
    • Try
      • Q(I);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);XQ(I)::S(G),XS(h)
        • S(h);::QAR1(I)
      • Refutation
        • B(c);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);XS(G)::QAR1(I)
        • S(g);OGATE::QAR2(I),XP(f)
        • S(h);N_GUARD::S(G),XS(g)
        • P(f);::QAR1(I)
      • Refutation
        • B(c);XQ(I)
  • Actual
    • R(A);
    • Threat
      • R(A)+S(G),DCHECK,XS(g)
    • Vars
      • B(a);N_GUARD,P_SPINB(a),XS(G)::QAB(I)
      • S(g);OGATE,P_SPINS(g),XS(G)::QAR2(I),XP(f)
      • P(e);OGATEB,P_SPINP(e),XS(G)::QAB(I)
      • S(g);::R(A)+S(G),DCHECK
      • P(e);OGATEB::QAB(I)
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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).