MESON Chess Problem Database

Problem Display
PID: 264103 (3NR1B1/2p1B2K/3n4/4kn2/rR6/8/4NP1b/2rq3Q w - - 0 1)

Herpai, S Ferenc

Kiss, Janos

3rd HM., Tijdschrift vd KNSB, 1940

3NR1B1/2p1B2K/3n4/4kn2/rR6/8/4NP1b/2rq3Q

#2

9 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Qd5#
    • 1...Qxe2
      • 2.Qd5#
    • 1...Qe1
      • 2.Qd5#
    • 1...Qf1
      • 2.Qd5#
    • 1...Qg1
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Rca1
      • 2.Sc6#
    • 1...Rb1
      • 2.Sc6#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Bg1
      • 2.f4#
    • 1...Sd4
      • 2.Qd5#
    • 1...Sc4
      • 2.Sc6#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sb5
      • 2.Qe4#
    • 1...Sb7
      • 2.Qe4#
    • 1...Sf7
      • 2.Qe4#
    • 1...Sc8
      • 2.Qe4#
    • 1...Sxe8
      • 2.Qe4#
    • 1...c5
      • 2.Sc6#
  • Tries
    • 1.Sf7+?
      • 1...Sxf7
        • 2.Qe4#
      • 1...Ke6!
    • 1.Rb5+?
      • 1...Qd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Rc5
        • 2.Sc6#
      • 1...c5
        • 2.Sc6#
      • 1...Sxb5!
  • Keys
    • 1.Rf8!
      • threat
        • 2.Bf6#
      • 1...Sxe7
        • 2.Qxh2#
      • 1...Se3
        • 2.Qxh2#
      • 1...Sg3
        • 2.f4#
      • 1...Sd4
        • 2.Qd5#
      • 1...Sh4
        • 2.Qxh2#
      • 1...Sh6
        • 2.Qxh2#
      • 1...Sg7
        • 2.Qxh2#
      • 1...Sc4
        • 2.Sc6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sb7
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Sc8
        • 2.Qe4#
      • 1...Se8
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::QAR1(A)
    • Q(b);N_GUARD,XS(B)::QAR1(A)
    • Q(b);N_GUARD::QAR1(A),XQ(b)
    • R(a);N_GUARD::S(G)
    • R(a);N_GUARD::S(G),XR(a)
    • B(c);N_GUARD::P(C)
    • S(f);S_CUTQ(b)::QAR1(A)
    • S(g);S_CUTR(a)::S(G)
    • S(g);N_GUARD::QAR1(A),XS(g)
    • S(g);N_GUARD::QAR1(A)
    • S(g);N_GUARD,XR(H)::QAR1(A)
    • P(h);S_CUTR(a)::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • S(g);XS(G)::QAR1(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • R(a);P_SPINR(a)::S(G)
        • P(h);P_SPINP(h)::S(G)
      • Refutation
        • S(g);XR(D)
  • Actual
    • R(H);
    • Threat
      • B(E)
    • Vars
      • S(f);N_GUARD,XB(E)::QAB(A),XB(c)
      • S(f);N_GUARD::QAB(A),XB(c)
      • S(f);S_CUTB(c)::P(C)
      • S(f);S_CUTQ(b)::QAR1(A)
      • S(g);S_CUTR(a)::S(G)
      • S(g);N_GUARD::QAR1(A),XS(g)
      • S(g);N_GUARD::QAR1(A)
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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).