MESON Chess Problem Database

Problem Display
PID: 199392 (1Nb4K/1B3p1p/5R2/pN1Pk1P1/r5Qr/5P2/1nqP1n2/8 w - - 0 1)

Fleck, Ferenc

The Problemist, 1954

1Nb4K/1B3p1p/5R2/pN1Pk1P1/r5Qr/5P2/1nqP1n2/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.d4#
    • 1...Ra2
      • 2.d4#
    • 1...Ra3
      • 2.d4#
    • 1...Bd7
      • 2.Sxd7#
    • 1...Sc4
      • 2.d4#
    • 1...Se4
      • 2.f4#
  • Tries
    • 1.Qxc8?
      • threat
        • 2.Sd7#
        • 2.Qe8#
      • 1...Qf5
        • 2.Rxf5#
        • 2.Qxf5#
        • 2.Qc7#
      • 1...Qc6
        • 2.Rf5#
        • 2.Qf5#
      • 1...Qc5
        • 2.Sd7#
        • 2.Rf5#
        • 2.Qf5#
      • 1...Qc7
        • 2.Rf5#
        • 2.Qf5#
        • 2.Qxc7#
      • 1...Qxc8+!
    • 1.Qg3+?
      • 1...Raf4
        • 2.d4#
      • 1...Rhf4!
    • 1.f4+?
      • 1...Ke4
        • 2.Qe2#
      • 1...Rxf4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd6#
      • 1...Bxd7
        • 2.Sxd7#
      • 1...Qc5
        • 2.Rf5#
      • 1...Qc6
        • 2.Sxc6#
        • 2.Rf5#
      • 1...Qc7
        • 2.Rf5#
        • 2.Qxc7#
      • 1...Sc4
        • 2.Sc6#
      • 1...Se4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::P(A)
    • B(j);N_GUARD::S(I),XB(j)
    • S(a);S_CUTR(d)::P(A)
    • S(c);SBLOCK,S_CUTR(d)::P(B)
  • Tries
    • Try
      • Q(C);XB(j)
      • Threat
        • DUALS(2)
      • Refutation
        • Q(b);CHECK,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • R(d);P_SPINR(d)::P(A)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • P(B);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR2(C)
      • Refutation
        • R(d);XP(B)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • B(j);XQ(C)::S(I),XB(j)
      • Q(b);N_GUARD::R1(G)
      • S(a);S_CUTQ(b)::S(I)
      • S(c);S_CUTQ(b)::R1(G)
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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).