MESON Chess Problem Database

Problem Display
PID: 250184 (7n/3pRp1B/K3P1rB/8/1Np1k1P1/2Q1bp1N/b3rqn1/4R3 w - - 0 1)

Boros, Sandor

4th HM., Shakhmaty, 1927

7n/3pRp1B/K3P1rB/8/1Np1k1P1/2Q1bp1N/b3rqn1/4R3

#2

10 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sxf2#
    • 1...Bd2
      • 2.Sxf2#
    • 1...Bf4
      • 2.Sxf2#
    • 1...Bb6
      • 2.exd7#
      • 2.exf7#
    • 1...Sf4
      • 2.Sg5#
    • 1...d6
      • 2.exf7#
    • 1...f6
      • 2.exd7#
  • Tries
    • 1.Bxg6+?
      • 1...fxg6
        • 2.exd7#
      • 1...f5
        • 2.Bxf5#
        • 2.exd7#
      • 1...Sxg6!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qe5#
      • 1...Bxf4
        • 2.Sxf2#
      • 1...Sxf4
        • 2.Sg5#
      • 1...Bd4
        • 2.Qc2#
      • 1...d6
        • 2.exf7#
      • 1...f6
        • 2.exd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD,N_SPINR(i),P_SPINR(b)::S(C),XQ(c)
    • S(d);SBLOCK,S_CUTB(e)::S(C)
    • P(j);N_PINP(G)::R(I)+P(G),XP(k)
    • P(k);N_PINP(G)::R(I)+P(G),XP(j)
  • Tries
    • Try
      • B(J);CHECK,N_SPINP(G),XR(i)
      • Vars
        • P(k);XB(J)::R(I)+P(G),XP(j)
      • Refutation
        • S(l);XB(J)
  • Actual
    • B(H);
    • Threat
      • QAR1(B)
    • Vars
      • B(e);N_GUARD,N_SPINR(i),P_SPINR(b),SBLOCK,XB(H)::S(C),XQ(c)
      • S(d);SBLOCK,XB(H)::S(C)
      • B(e);N_SPINR(i),P_SPINR(b),SBLOCK::QAB(B)
      • P(j);N_PINP(G)::R(I)+P(G),XP(k)
      • P(k);N_PINP(G)::R(I)+P(G),XP(j)
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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).