MESON Chess Problem Database

Problem Display
PID: 162095 (7b/B3Q3/b1pp3p/r1rP2NK/P2k4/R5p1/4pnB1/N1R2n2 w - - 0 1)

Neunivako, Pavel Efimovich

Zadachi i Etyudi, 1928

7b/B3Q3/b1pp3p/r1rP2NK/P2k4/R5p1/4pnB1/N1R2n2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Sb3#
    • 1...Bc4
      • 2.Sc2#
    • 1...Be5
      • 2.Se6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bg7
      • 2.Qxg7#
    • 1...Sd2
      • 2.Qe3#
    • 1...Sh2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Sd3
      • 2.Sb3#
      • 2.Qe4#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qe4#
    • 1...cxd5
      • 2.Sf3#
  • Tries
    • 1.Rc4+?
      • 1...Bxc4
        • 2.Sc2#
      • 1...Kxc4!
    • 1.Rd3+?
      • 1...Bxd3
        • 2.Sb3#
      • 1...Sxd3
        • 2.Sb3#
        • 2.Qe4#
      • 1...Kxd3!
    • 1.Qxe2?
      • threat
        • 2.Sc2#
        • 2.Sb3#
        • 2.Se6#
        • 2.Qb2#
      • 1...hxg5
        • 2.Sc2#
        • 2.Sb3#
        • 2.Qb2#
      • 1...Se3
        • 2.Qb2#
        • 2.Qxe3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Bd3
        • 2.Sb3#
        • 2.Se6#
      • 1...Rb5
        • 2.Sc2#
        • 2.Se6#
        • 2.Rc4#
      • 1...Bc4
        • 2.Sc2#
        • 2.Se6#
        • 2.Rxc4#
        • 2.Qb2#
      • 1...Bc8
        • 2.Sc2#
        • 2.Sb3#
        • 2.Rc4#
        • 2.Qb2#
      • 1...Sd2
        • 2.Sc2#
        • 2.Se6#
        • 2.Qe3#
      • 1...Sd1
        • 2.Sc2#
        • 2.Sb3#
        • 2.Se6#
        • 2.Qe4#
      • 1...Sd3
        • 2.Sb3#
        • 2.Se6#
        • 2.Qe4#
      • 1...Bxe2+!
    • 1.Qe5+?
      • 1...Bxe5
        • 2.Se6#
      • 1...dxe5
        • 2.Se6#
      • 1...Kxe5!
  • Keys
    • 1.dxc6!
      • threat
        • 2.Qxd6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Bd3
        • 2.Sb3#
      • 1...Bc4
        • 2.Sc2#
      • 1...Be5
        • 2.Se6#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd3
        • 2.Sb3#
        • 2.Qe4#
      • 1...d5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • B(h);SBLOCK::S(A)
    • B(l);SBLOCK::S(G)
    • B(l);N_GUARD::QAB(J),XB(l)
    • S(a);N_GUARD::QAB1(J)
    • S(a);N_GUARD::QAB1(J),XS(a)
    • S(c);N_GUARD::QAR1(J)
    • S(c);N_GUARD::QAR1(J),XS(c)
    • P(i);SBLOCK,XP(F)::S(G)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • B(h);SBLOCK,XR(B)::S(A)
      • Refutation
        • K(e);N_SPINR(g),P-FLIGHT,XR(B)
    • Try
      • R(D);CHECK
      • Vars
        • B(h);SBLOCK,XR(D)::S(A)
      • Refutation
        • K(e);N_SPINR(g),P-FLIGHT,XR(D)
    • Try
      • Q(J);XP(b)
      • Threat
        • DUALS(4)
      • Vars
        • S(c);N_GUARD::QAR1(J),XS(c)
      • Refutation
        • B(h);CHECK,XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • B(l);SBLOCK,XQ(J)::S(G)
        • P(j);SBLOCK,XQ(J)::S(G)
      • Refutation
        • K(e);N_SPINR(g),S_FLIGHT,XQ(J)
  • Actual
    • P(F);P_SPINS(G),XP(i)
    • Threat
      • QAR2(J),XP(j)
    • Vars
      • S(c);N_GUARD::QAR1(J),XS(c)
      • B(h);SBLOCK::S(A)
      • B(l);N_PINS(G),SBLOCK::S(G)
      • S(a);N_GUARD::QAB1(J),XS(a)
      • P(j);N_PINS(G),SBLOCK::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).