MESON Chess Problem Database

Problem Display
PID: 257255 (5K1B/1b2Pp1B/2n1P1p1/1q1P2Q1/3pkNPN/2Prp1pr/4P3/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

Phenix, 2020

5K1B/1b2Pp1B/2n1P1p1/1q1P2Q1/3pkNPN/2Prp1pr/4P3/8

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.exd3#
    • 1...Qb2
      • 2.exd3#
    • 1...Qb3
      • 2.exd3#
    • 1...Qb4
      • 2.exd3#
    • 1...Qa5
      • 2.exd3#
    • 1...Qc5
      • 2.exd3#
    • 1...Qxd5
      • 2.exd3#
    • 1...Qb6
      • 2.exd3#
    • 1...Sb4
      • 2.Qe5#
    • 1...Sa5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sa7
      • 2.Qe5#
    • 1...Sxe7
      • 2.Qe5#
    • 1...Sb8
      • 2.Qe5#
    • 1...Sd8
      • 2.Qe5#
    • 1...fxe6
      • 2.Bxg6#
  • Tries
    • 1.Kxf7?
      • threat
        • 2.Bxg6#
      • 1...Se5+
        • 2.Qxe5#
      • 1...Qxd5
        • 2.exd3#
      • 1...Sxe7
        • 2.Qe5#
      • 1...Sd8+!
    • 1.Shxg6?
      • threat
        • 2.Qf5#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Sxe7
        • 2.Qe5#
      • 1...fxe6
        • 2.Sh4#
      • 1...fxg6
        • 2.Bxg6#
      • 1...f5
        • 2.Qxf5#
      • 1...Rh5!
    • 1.Bxg6+?
      • 1...f5
        • 2.Bxf5#
        • 2.Qxf5#
      • 1...fxg6!
    • 1.Qxg6+?
      • 1...Kxf4
        • 2.Sg2#
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...fxg6!
    • 1.exf7?
      • threat
        • 2.Bxg6#
      • 1...Qxd5
        • 2.exd3#
      • 1...Sxe7
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Bc8!
  • Keys
    • 1.Sfxg6!
      • threat
        • 2.Qf5#
      • 1...Qxd5
        • 2.Qf4#
      • 1...Sxe7
        • 2.Qe5#
      • 1...fxe6
        • 2.Sf4#
      • 1...fxg6
        • 2.Bxg6#
      • 1...Se5
        • 2.Qxe5#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(g);N_GUARD::P(A),XR(a)
    • Q(g);N_GUARD,P_PINP(I)::P(A),XR(a)
    • Q(g);N_GUARD,XP(F)::P(A),XR(a)
    • S(h);N_GUARD::QAR1(G)
    • S(h);N_GUARD::QAR1(G),XS(h)
    • S(h);N_GUARD,XP(I)::QAR1(G)
    • P(k);N_GUARD,XP(H)::B(J),XP(i)
  • Tries
    • Try
      • K(K);P-FLIGHT,XP(k)
      • Threat
        • B(J),XP(i)
      • Vars
        • S(h);CHECK,N_GUARD::QAR1(G),XS(h)
        • Q(g);N_GUARD,P_PINP(H),XP(F)::P(A),XR(a)
        • S(h);N_GUARD,XP(I)::QAR1(G)
      • Refutation
        • S(h);CHECK
    • Try
      • S(E);XP(i)
      • Threat
        • QAB1(G)
      • Vars
        • Q(g);OGATE,XP(F)::QAB1(G),XQ(g)
        • S(h);N_GUARD,XP(I)::QAR1(G)
        • P(k);N_GUARD,XP(H)::B(J)+S(E)
        • P(k);OGATE,P_SPINP(k),XS(E)::B(J),XP(k)
        • P(k);::QAB1(G),XP(k)
      • Refutation
        • R(d);
    • Try
      • B(J);CHECK,XP(i)
      • Refutation
        • P(k);XB(J)
    • Try
      • Q(G);CHECK,XP(i)
      • Vars
        • P(k);P_SPINP(k)::QAB1(G),XP(k)
      • Refutation
        • P(k);P_SPINP(k),XQ(G)
    • Try
      • P(H);XP(k)
      • Threat
        • B(J),XP(i)
      • Vars
        • Q(g);N_GUARD,XP(F)::P(A),XR(a)
        • S(h);N_GUARD,XP(I)::QAR1(G)
        • S(h);N_GUARD::QAR1(G),XS(h)
      • Refutation
        • B(j);
  • Actual
    • S(C);XP(i)
    • Threat
      • QAB1(G)
    • Vars
      • Q(g);SBLOCK,XP(F)::QAR1(G)
      • S(h);N_GUARD,XP(I)::QAR1(G)
      • P(k);N_GUARD,XP(H)::B(J)+S(C)
      • P(k);OGATE,P_SPINP(k),XS(C)::B(J),XP(k)
      • S(h);N_GUARD::QAR1(G),XS(h)
      • P(k);::QAB1(G),XP(k)
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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).