MESON Chess Problem Database

Problem Display
PID: 235731 (1Bn1b1B1/1p2p3/3RN3/2pNkP2/1pP1nR2/1P6/4P1K1/7Q w - - 0 1)

Vakhlakov, Yuri Nikolaevich

Zadachi i Etyudi, 2002

1Bn1b1B1/1p2p3/3RN3/2pNkP2/1pP1nR2/1P6/4P1K1/7Q

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qa1#
      • 2.Qh8#
    • 1...Sf2
      • 2.Qa1#
      • 2.Qh8#
    • 1...Sc3
      • 2.Qh8#
    • 1...Sg3
      • 2.Qa1#
      • 2.Qh8#
    • 1...Sg5
      • 2.Qa1#
      • 2.Qh8#
    • 1...Sexd6
      • 2.Qa1#
      • 2.Qh8#
    • 1...Sf6
      • 2.Qa1#
  • Tries
    • 1.Kg1?
      • threat
        • 2.Qxe4#
      • 1...Sexd6
        • 2.Qe4#
        • 2.Qh8#
      • 1...Sd2
        • 2.Qh8#
      • 1...Sf2
        • 2.Qh8#
      • 1...Sc3
        • 2.Qh8#
      • 1...Sg3
        • 2.Qh8#
      • 1...Sg5
        • 2.Qh8#
      • 1...Sf6!
    • 1.Kh2?
      • threat
        • 2.Qxe4#
      • 1...Sexd6
        • 2.Qe4#
        • 2.Qa1#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sf2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...Sg5
        • 2.Qa1#
      • 1...Sf6
        • 2.Qa1#
      • 1...Sc3!
    • 1.Se3?
      • threat
        • 2.Sg4#
      • 1...Kf6
        • 2.Sg4#
        • 2.Qh8#
      • 1...Sf2
        • 2.Qa1#
        • 2.Qh8#
      • 1...Sf6
        • 2.Rd5#
        • 2.Qa1#
      • 1...Bh5!
    • 1.Sd4?
      • threat
        • 2.Sf3#
      • 1...Kxd4
        • 2.Qa1#
      • 1...cxd4
        • 2.Re6#
      • 1...Sd2
        • 2.Re6#
        • 2.Qh8#
      • 1...Sg5
        • 2.Re6#
        • 2.Qh8#
      • 1...Bh5!
    • 1.Sg5?
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Sf3#
        • 2.Rxe4#
        • 2.Qa1#
      • 1...Sxg5
        • 2.Re6#
        • 2.Qa1#
        • 2.Qh8#
      • 1...Sd2
        • 2.Re6#
        • 2.Qa1#
        • 2.Qh8#
      • 1...Bh5!
    • 1.Ra6+?
      • 1...Sed6
        • 2.Qa1#
        • 2.Qh8#
      • 1...Scd6!
    • 1.Rb6+?
      • 1...Sed6
        • 2.Qa1#
        • 2.Qh8#
      • 1...Scd6!
    • 1.Rc6+?
      • 1...Sed6
        • 2.Qa1#
        • 2.Qh8#
      • 1...Scd6!
    • 1.Rd7+?
      • 1...Sed6
        • 2.Qa1#
        • 2.Qh8#
      • 1...Scd6!
    • 1.Rd8+?
      • 1...Sed6
        • 2.Qa1#
        • 2.Qh8#
      • 1...Scd6!
    • 1.Qb1?
      • threat
        • 2.Qxe4#
      • 1...Sexd6
        • 2.Qe4#
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sd2
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sf2
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sg3
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sg5
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sf6
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sc3!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sg4#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sxf6
        • 2.Rd5#
        • 2.Qa1#
      • 1...exf6
        • 2.Rd5#
      • 1...Bh5
        • 2.Sd7#
      • 1...Sf2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAB(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR1(A),XS(b)
      • Vars
        • S(b);N_GUARD::QAB(A)
      • Refutation
        • S(b);
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR1(A),XS(b)
      • Vars
        • S(b);N_GUARD::QAB(A)
      • Refutation
        • S(b);
    • Try
      • S(G);
      • Threat
        • S(G)
      • Refutation
        • B(h);
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • K(d);OGATEB,P_SPINS(b),S_FLIGHT,XS(J)::QAB(A)
        • P(c);SBLOCK,XS(J)::B(K)+R(I),DCHECK
      • Refutation
        • B(h);
    • Try
      • S(J);
      • Threat
        • S(J)
      • Refutation
        • B(h);
    • Try
      • R(I);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • R(I);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • R(I);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • R(I);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • R(I);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XS(b)
      • Refutation
        • S(b);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB(A)
      • P(f);SBLOCK,XS(G)::B(K)+R(I),DCHECK
      • B(h);N_GUARD::S(G)
      • S(b);N_GUARD::QAB(A)
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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).