MESON Chess Problem Database

Problem Display
PID: 6683 (BQn4b/2R5/3Np2n/2p1k1P1/r1P1N2p/p3P1p1/p2r3B/K2b4 w - - 0 1)

Keres, Paul P

3rd Prize, Sports Referee, 1932

BQn4b/2R5/3Np2n/2p1k1P1/r1P1N2p/p3P1p1/p2r3B/K2b4

#2

10 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Rxc5#
    • 1...Rc2
      • 2.Rxc5#
    • 1...Re2
      • 2.Rxc5#
    • 1...Rf2
      • 2.Rxc5#
    • 1...Rg2
      • 2.Rxc5#
    • 1...Rxh2
      • 2.Rxc5#
    • 1...Rxd6
      • 2.Rxc5#
    • 1...Sf5
      • 2.Sf7#
    • 1...Sb6
      • 2.Qxh8#
    • 1...Sa7
      • 2.Qxh8#
    • 1...Se7
      • 2.Qxh8#
    • 1...h3
      • 2.Bxg3#
  • Tries
    • 1.Sf7+?
      • 1...Sxf7
        • 2.Rxc5#
      • 1...Kf5+!
    • 1.Qb2+?
      • 1...Rxb2
        • 2.Rxc5#
      • 1...Rd4
        • 2.Rxc5#
      • 1...axb2+!
  • Keys
    • 1.Sxg3!
      • threat
        • 2.Se2#
      • 1...Kxd6+
        • 2.Rg7#
      • 1...Rxh2
        • 2.Rxc5#
      • 1...Rxd6
        • 2.Rxc5#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...Sxd6
        • 2.Qxh8#
      • 1...hxg3
        • 2.Bxg3#
      • 1...Re2
        • 2.Sxe2#
        • 2.Rxc5#
      • 1...Rf2
        • 2.Rxc5#
      • 1...Rg2
        • 2.Rxc5#
      • 1...Rd4
        • 2.Sge4#
      • 1...Be2
        • 2.Sf1#
        • 2.Sh1#
        • 2.Sxe2#
        • 2.Sge4#
        • 2.Sgf5#
        • 2.Sh5#
      • 1...Sg4
        • 2.Sf7#
      • 1...Sf5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::R(H),XP(h)
    • R(c);N_GUARD,N_SPINP(e),XB(B)::R(H),XP(h)
    • R(c);N_GUARD,XS(G)::R(H),XP(h)
    • S(k);N_GUARD,SBLOCK::S(G)
    • S(l);OGATE::QAB(J),XB(m)
    • P(g);N_GUARD::B(B),XP(e)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • S(k);XS(G)::QAB(J)+R(H),DCHECK,XP(h)
      • Refutation
        • K(i);CHECK,N_SPINP(e),P-FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • R(c);XQ(J)::R(H),XP(h)
        • R(c);P_SPINR(c)::R(H),XP(h)
      • Refutation
        • P(d);CHECK,XQ(J)
  • Actual
    • S(E);XP(e)
    • Threat
      • B(B)+S(E)
    • Vars
      • K(i);CHECK,OGATEB,S_FLIGHT,XS(G)::QAB(J)+R(H)
      • R(c);N_GUARD,XB(B)::R(H),XP(h)
      • R(c);N_GUARD,XS(G)::R(H),XP(h)
      • R(f);XP(D)::S(G),XR(f)
      • S(l);OGATE,SBLOCK,XS(G)::QAB(J),XB(m)
      • P(g);OGATE,P_SPINP(g),XS(E)::B(B),XP(g)
      • R(c);N_GUARD::R(H),XP(h)
      • R(c);N_GUARD::B(B)+S(E)
      • S(k);N_GUARD::S(G)
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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).