MESON Chess Problem Database

Problem Display
PID: 81031 (4RB2/2pb4/4n1p1/q3NpP1/1ppk1p2/1p2NQP1/3P2K1/1B6 w - - 0 1)

Pituk, Alexander

Smer, 1960

4RB2/2pb4/4n1p1/q3NpP1/1ppk1p2/1p2NQP1/3P2K1/1B6

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qxf4#
    • 1...Qb6
      • 2.Qd5#
    • 1...Qa1
      • 2.Qd5#
    • 1...Qa2
      • 2.Qd5#
    • 1...Qa3
      • 2.Qd5#
    • 1...Qa4
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qa6
      • 2.Qd5#
    • 1...Qa7
      • 2.Qd5#
    • 1...Bb5
      • 2.Qd5#
    • 1...Bc6
      • 2.Sxc6#
    • 1...Bc8
      • 2.Sc6#
    • 1...Sc5
      • 2.Qd5#
    • 1...Sg7
      • 2.Qxf4#
    • 1...Sd8
      • 2.Qxf4#
    • 1...c5
      • 2.Qd5#
  • Tries
    • 1.Sc2+?
      • 1...Kxe5
        • 2.gxf4#
      • 1...bxc2!
    • 1.Sxf5+?
      • 1...Kxe5
        • 2.Bg7#
        • 2.Qe4#
        • 2.gxf4#
      • 1...gxf5!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Sf3#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Bxc6+
        • 2.Sxc6#
      • 1...f3+
        • 2.Sxf3#
      • 1...Kxe5
        • 2.Bg7#
      • 1...Qxe5
        • 2.Qxc4#
      • 1...Sxg5
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • K(d);P_SPINS(h),S_FLIGHT,XS(G)::QAB1(E),XP(e)
    • Q(f);N_GUARD::QAR1(E)
    • Q(f);N_GUARD,P_PINP(B)::QAR1(E)
    • Q(f);N_GUARD,P_PINQ(E)::QAR1(E),XQ(f)
    • B(k);S_CUTQ(f)::QAR1(E)
    • B(k);N_GUARD,P_PINQ(E)::S(G),XB(k)
    • B(k);N_GUARD::S(G)
    • S(h);S_CUTQ(f)::QAR1(E)
    • S(h);N_GUARD::QAR2(E),XP(e)
    • P(j);S_CUTQ(f)::QAR1(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);P_SPINS(h),S_FLIGHT,XS(G)::P(F),XP(e)
      • Refutation
        • P(a);XS(D)
    • Try
      • S(D);CHECK,XP(g)
      • Refutation
        • P(i);XS(D)
  • Actual
    • Q(E);
    • Threat
      • S(G)
    • Vars
      • Q(f);CHECK,N_GUARD::QAR1(E),XQ(f)
      • B(k);CHECK,XQ(E)::S(G),XB(k)
      • P(e);CHECK::S(G),XP(e)
      • K(d);OGATEB,P_SPINS(h),S_FLIGHT,XS(G)::B(J)
      • Q(f);SBLOCK,XS(G)::QAR1(E),XP(c)
      • S(h);XP(H)::QAR1(E),XP(c)
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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).