MESON Chess Problem Database

Problem Display
PID: 173607 (1rn2N1K/3B3Q/pN3RP1/1PkP4/n3R3/b4p2/1prP3B/q7 w - - 0 1)

Boros, Sandor

3rd Prize, Grantham Journal, 1933

1rn2N1K/3B3Q/pN3RP1/1PkP4/n3R3/b4p2/1prP3B/q7

#2

12 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Rc4#
    • 1...Rc4
      • 2.Rxc4#
    • 1...Bb4
      • 2.d4#
    • 1...Sc3
      • 2.Rc4#
    • 1...Sa7
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...axb5
      • 2.Rc6#
  • Tries
    • 1.Bg1+?
      • 1...f2
        • 2.Bxf2#
      • 1...Qxg1!
    • 1.Qe7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sxe7!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Sxa4#
      • 1...Rxb6
        • 2.d6#
      • 1...Saxb6
        • 2.Se6#
      • 1...Scxb6
        • 2.Bd6#
      • 1...axb5
        • 2.Rc6#
      • 1...Rc4
        • 2.Rxc4#
      • 1...Bb4
        • 2.d4#
      • 1...Sc3
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD,XP(A)::R1(C)
    • R(c);N_GUARD::R1(C),XR(c)
    • B(d);SBLOCK::P(A)
    • S(f);S_CUTR(c)::R1(C)
    • S(j);N_GUARD,P_PINS(K)::QAB(J)
    • S(j);N_GUARD,P_PINS(K)::QAB(J),XS(j)
    • P(h);SBLOCK,XP(D)::R1(G)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(e);P_SPINP(e)::B(B),XP(e)
      • Refutation
        • Q(a);XB(B)
    • Try
      • Q(J);CHECK
      • Vars
        • S(j);N_GUARD,P_PINS(K),P_SPINS(j)::QAB1(J),XS(j)
      • Refutation
        • S(j);P_PINS(K),XQ(J)
  • Actual
    • Q(J);
    • Threat
      • S(F),XS(f)
    • Vars
      • R(i);SBLOCK,XS(F)::QAR(J)+P(E)
      • S(f);SBLOCK,XS(F)::S(K)
      • S(j);N_GUARD,P_PINS(K),SBLOCK,XS(F)::B(B)
      • P(h);SBLOCK,XP(D)::R1(G)
      • R(c);N_GUARD::R1(C),XR(c)
      • B(d);SBLOCK::P(A)
      • S(f);S_CUTR(c)::R1(C)
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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).