MESON Chess Problem Database

Problem Display
PID: 231265 (K2B4/1Qpp4/6pb/1N3k1N/1nBP2p1/5b2/6n1/5R2 w - - 0 1)

Kreitsman, V

1st HM., Zadachi i Etyudi, 1927

K2B4/1Qpp4/6pb/1N3k1N/1nBP2p1/5b2/6n1/5R2

#2

8 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Sg7#
    • 1...Sf4
      • 2.Sg3#
    • 1...Sa2
      • 2.Qd5#
    • 1...Sc2
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...c5
      • 2.Sd6#
    • 1...c6
      • 2.Sd6#
  • Tries
    • 1.Rxf3+?
      • 1...Bf4
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sf4
        • 2.Sg3#
      • 1...gxf3!
    • 1.Qxf3+?
      • 1...Bf4
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sf4
        • 2.Sg3#
      • 1...gxf3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...d5
        • 2.Qc8#
      • 1...Bf4
        • 2.Sg7#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sc6
        • 2.Qb1#
      • 1...c6
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(g);N_GUARD,N_SPINB(b),SBLOCK::S(E)
    • S(a);N_SPINB(b),SBLOCK::S(E)
    • S(c);N_GUARD::QAR2(F)
    • S(c);N_GUARD,N_PINQ(F)::QAR2(F),XS(c)
    • P(h);N_GUARD::S(D)
    • P(h);N_GUARD,N_PINQ(F)::S(D)
  • Tries
    • Try
      • R(A);CHECK,N_SPINQ(F),XB(b)
      • Vars
        • S(a);P_SPINS(a)::S(E)
      • Refutation
        • P(d);XR(A)
    • Try
      • Q(F);CHECK,N_SPINQ(F),XB(b)
      • Vars
        • S(a);P_SPINS(a)::S(E)
      • Refutation
        • P(d);P_SPINP(d),XQ(F)
  • Actual
    • S(D);
    • Threat
      • QAB1(F)
    • Vars
      • S(c);N_GUARD,N_PINQ(F)::QAR2(F),XS(c)
      • P(i);N_PINQ(F)::QAB(F)
      • B(g);N_GUARD,N_SPINB(b),SBLOCK::S(E)
      • S(a);N_SPINB(b),SBLOCK::S(E)
      • S(c);N_PINQ(F)::QAB(F)
      • P(h);N_PINQ(F)::QAB(F),XP(i)
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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).