MESON Chess Problem Database

Problem Display
PID: 173084 (3b2KB/1p2k1np/7R/pBP1Np1p/6N1/r3n3/5Rp1/4Q3 w - - 0 1)

Barulin, Mikhail Mikhailovich

1st HM., Il Problema, 1934

3b2KB/1p2k1np/7R/pBP1Np1p/6N1/r3n3/5Rp1/4Q3

#2

9 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sg6#
    • 1...Sf1
      • 2.Sg6#
    • 1...Sc2
      • 2.Sg6#
    • 1...Sc4
      • 2.Sg6#
    • 1...Sd5
      • 2.Sg6#
    • 1...Se6
      • 2.Bf6#
    • 1...fxg4
      • 2.Rf7#
  • Tries
    • 1.Rxf5?
      • threat
        • 2.Rf7#
        • 2.Qh4#
      • 1...Sxg4
        • 2.Sg6#
        • 2.Rf7#
      • 1...Sexf5
        • 2.Sg6#
      • 1...Bb6
        • 2.Qh4#
      • 1...Bc7
        • 2.Qh4#
      • 1...Se8
        • 2.Rf7#
      • 1...Sd5
        • 2.Sg6#
        • 2.Rf7#
      • 1...Se6
        • 2.Bf6#
        • 2.Rf7#
      • 1...h4
        • 2.Rf7#
        • 2.Qxh4#
      • 1...Sgxf5!
    • 1.Re6+?
      • 1...Sxe6
        • 2.Bf6#
      • 1...Kxe6!
    • 1.Qxe3?
      • threat
        • 2.Sg6#
        • 2.Qg5#
      • 1...hxg4
        • 2.Qg5#
      • 1...Bb6
        • 2.Qg5#
      • 1...Bc7
        • 2.Qg5#
      • 1...Se8
        • 2.Sd3#
        • 2.Sg6#
      • 1...Se6
        • 2.Bf6#
      • 1...f4
        • 2.Sg6#
      • 1...Rxe3!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Qh4#
      • 1...Sxg4
        • 2.Sc6#
      • 1...Se8
        • 2.Rd7#
      • 1...Sd5
        • 2.Sg6#
      • 1...Se6
        • 2.Bf6#
      • 1...h4
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(c);::QAR(A)+S(F),DCHECK
    • S(i);OGATE,SBLOCK::B(I)
    • P(e);OGATE,XS(C)::R1(B)
  • Tries
    • Try
      • R(B);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XR(B)::QAR(A)+S(F),DCHECK
        • B(k);::QAB(A)
        • S(i);::R1(B)
      • Refutation
        • S(i);XR(B)
    • Try
      • R(G);CHECK
      • Vars
        • S(i);OGATE,SBLOCK,XR(G)::B(I)
      • Refutation
        • K(h);P-FLIGHT,XR(G)
    • Try
      • Q(A);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(C)::QAB(A)
        • B(k);::QAB(A)
        • S(i);OGATE,SBLOCK::B(I)
        • P(e);::QAR(A)+S(F),DCHECK
      • Refutation
        • R(b);XQ(A)
  • Actual
    • R(B);
    • Threat
      • QAB(A)
    • Vars
      • S(c);XS(C)::QAR(A)+S(F),DCHECK
      • S(i);SBLOCK::R1(B)
      • S(c);::QAR(A)+S(F),DCHECK
      • S(i);OGATE,SBLOCK::B(I)
      • P(f);::QAB(A),XP(f)
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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).