MESON Chess Problem Database

Problem Display
PID: 264859 (r1n5/3Q3K/2pn2p1/2Bpp3/3NkN1p/1P5P/b2PP1P1/b4R2 w - - 0 1)

Basisty, Mark Borisovich

Vasilenko, Anatoly Grigorovich

1st HM., Shedey-80 MT, 2020

r1n5/3Q3K/2pn2p1/2Bpp3/3NkN1p/1P5P/b2PP1P1/b4R2

#2

11 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qe6#
    • 1...exf4
      • 2.Qe6#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sg5#
      • 1...Kxf4
        • 2.Qg4#
      • 1...exf4
        • 2.d3#
      • 1...g5
        • 2.Sxg5#
      • 1...Sf7!
    • 1.Sh5?
      • threat
        • 2.Sf6#
        • 2.Qg4#
      • 1...exd4
        • 2.Qe6#
      • 1...Ra7
        • 2.Sf6#
      • 1...Sf5
        • 2.Sf6#
      • 1...Se8
        • 2.Qg4#
      • 1...gxh5!
    • 1.Sxg6?
      • threat
        • 2.Qg4#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Ra7!
    • 1.Rf3?
      • threat
        • 2.d3#
      • 1...exd4
        • 2.Qe6#
      • 1...exf4
        • 2.Qe6#
      • 1...Bb1!
    • 1.Qg4?
      • threat
        • 2.Sd3#
        • 2.Sh5#
        • 2.Sfe6#
        • 2.Sxg6#
        • 2.Qf3#
      • 1...Bxd4
        • 2.Sd3#
        • 2.Sh5#
        • 2.Se6#
        • 2.Sxg6#
      • 1...exd4
        • 2.Sd3#
        • 2.Sxg6#
        • 2.Qe6#
      • 1...exf4
        • 2.Qe6#
        • 2.Qxf4#
      • 1...g5
        • 2.Sd3#
        • 2.Sh5#
        • 2.Sfe6#
        • 2.Sg6#
        • 2.Qf3#
      • 1...Ra7+!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Qxc6#
      • 1...exd4
        • 2.Qe6#
      • 1...cxd5
        • 2.Qg4#
      • 1...Se8
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATEB,XS(G)::QAR2(J)
    • P(f);OGATEB,XS(H)::QAR2(J)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XS(H)::QAR1(J)
        • P(f);SBLOCK,XS(H)::P(B)
        • P(i);::S(G),XP(i)
      • Refutation
        • S(h);
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATEB,XS(G)::QAR2(J)
        • R(j);P_PINQ(J)::S(H)
        • S(h);::S(H)
        • S(h);::QAR2(J)
      • Refutation
        • P(i);XS(H)
    • Try
      • S(H);XP(i)
      • Threat
        • QAR2(J)
      • Vars
        • S(h);N_GUARD::QAB1(J),XS(h)
      • Refutation
        • R(j);P_PINQ(J)
    • Try
      • R(A);
      • Threat
        • P(B)
      • Vars
        • P(f);OGATEB,XS(G)::QAR2(J)
        • P(f);OGATEB,XS(H)::QAR2(J)
      • Refutation
        • B(b);
    • Try
      • Q(J);
      • Threat
        • DUALS(5)
      • Refutation
        • R(j);CHECK
  • Actual
    • S(H);XP(e)
    • Threat
      • S(H)
    • Vars
      • K(c);OGATEB,P_SPINS(h),S_FLIGHT,XS(H)::QAB1(J),XP(g)
      • P(f);OGATEB,XS(G)::QAR2(J)
      • P(g);SBLOCK,XS(H)::QAR2(J)
      • S(h);::P(B)
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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).