MESON Chess Problem Database

Problem Display
PID: 173629 (Q2b1B2/K1PB1N2/8/p1Pn2N1/r2k3r/1p4R1/1P2P3/2Rq4 w - - 0 1)

Boros, Sandor

2nd Prize, Nepszava, 1937

Q2b1B2/K1PB1N2/8/p1Pn2N1/r2k3r/1p4R1/1P2P3/2Rq4

#2

12 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Rd3#
    • 1...Qf1
      • 2.Rd3#
    • 1...Qg1
      • 2.Rd3#
    • 1...Qh1
      • 2.Rd3#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Rc4
      • 2.Rxd1#
    • 1...Se3
      • 2.Sf3#
      • 2.Se6#
    • 1...Sb4
      • 2.Se6#
    • 1...Sf4
      • 2.Qe4#
    • 1...Sb6
      • 2.Se6#
    • 1...Sf6
      • 2.Se6#
    • 1...Se7
      • 2.Se6#
      • 2.Bg7#
  • Tries
    • 1.Bg7+?
      • 1...Sf6
        • 2.Se6#
      • 1...Bf6!
  • Keys
    • 1.Be6!
      • threat
        • 2.Qxd5#
      • 1...Sxc7
        • 2.Rxd1#
      • 1...Qh1
        • 2.Rd3#
      • 1...Sc3
        • 2.bxc3#
      • 1...Se3
        • 2.Sf3#
      • 1...Sb4
        • 2.Rc4#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sb6
        • 2.Rxd1#
      • 1...Sf6
        • 2.Rxd1#
      • 1...Se7
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::R1(D)
    • Q(a);N_GUARD::R1(D),XQ(a)
    • R(c);SBLOCK::R(A),XQ(a)
    • S(g);::S(F)
    • S(g);OGATE::QAR1(K)
  • Tries
    • Try
      • B(L);CHECK
      • Vars
        • S(g);P_SPINS(g)::S(F)
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • B(I);
    • Threat
      • QAR1(K),XS(g)
    • Vars
      • S(g);XP(H)::R(A),XQ(a)
      • Q(a);N_GUARD::R1(D)
      • S(g);OGATE::P(B),XS(g)
      • S(g);SBLOCK::S(F)
      • S(g);S_CUTR(c)::R1(A)
      • S(g);OGATE::QAR1(K)
      • S(g);::R(A),XQ(a)
      • S(g);N_GUARD,S_CUTB(h)::B(L)
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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).