MESON Chess Problem Database

Problem Display
PID: 6573 (8/2p3p1/N1Ppp1B1/bQ2P3/1pn1r2p/1p1k2nR/1Pb1NP2/2R1K3 w - - 0 1)

Fleck, Ferenc

1st HM., Ajan Sana, 1932

8/2p3p1/N1Ppp1B1/bQ2P3/1pn1r2p/1p1k2nR/1Pb1NP2/2R1K3

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxc4#
    • 1...Bd1
      • 2.Qxc4#
    • 1...Bb6
      • 2.Sxb4#
    • 1...dxe5
      • 2.Sc5#
    • 1...d5
      • 2.Sc5#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qd4#
      • 1...dxc5
        • 2.Sxc5#
      • 1...Bb6
        • 2.Sxb4#
      • 1...dxe5!
    • 1.fxg3?
      • threat
        • 2.gxh4#
        • 2.g4#
      • 1...Ke3
        • 2.gxh4#
        • 2.g4#
      • 1...hxg3
        • 2.Rxg3#
      • 1...Bb6!
    • 1.exd6?
      • threat
        • 2.Sc5#
      • 1...Bb6
        • 2.Sxb4#
      • 1...cxd6!
  • Keys
    • 1.Qxb4!
      • 1...Bxb4+
        • 2.Sxb4#
      • 1...Sxb2
        • 2.Bxe4#
      • 1...Sxe5
        • 2.Bxe4#
      • 1...dxe5
        • 2.Sc5#
      • 1...Bb1
        • 2.Rc3#
      • 1...Bd1
        • 2.Rc3#
      • 1...Bb6
        • 2.Qc3#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa3
        • 2.Bxe4#
      • 1...Se3
        • 2.Sf4#
      • 1...Sb6
        • 2.Bxe4#
      • 1...d5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(a);::QAB1(G),XS(f)
    • B(i);N_GUARD::S(I),XP(e)
    • P(j);N_GUARD,XP(H)::S(I)
    • P(j);N_GUARD::S(I)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(j);XQ(G)::S(I),XP(j)
        • B(i);N_GUARD::S(I),XP(e)
      • Refutation
        • P(j);XP(H)
    • Try
      • P(E);P_PINS(f),XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);OGATE,P_SPINP(h),XP(E)::R(F),XP(h)
      • Refutation
        • B(i);
    • Try
      • P(H);XP(j)
      • Threat
        • S(I)
      • Vars
        • B(i);N_GUARD::S(I),XP(e)
      • Refutation
        • P(l);XP(H)
  • Actual
    • Q(G);P_SPINQ(G),XP(e)
    • Vars
      • B(i);CHECK,XQ(G)::S(I),XB(i)
      • S(f);XP(C)::B(K),XR(g)
      • S(f);XP(H)::B(K),XR(g)
      • P(j);N_GUARD,XP(H)::S(I)
      • B(a);OGATE::R1(A)
      • B(i);N_GUARD,N_PINQ(G)::QAR1(G)
      • S(f);N_PINQ(G)::QAR1(G)
      • S(f);::B(K),XR(g)
      • S(f);N_PINS(D),N_SPINS(d)::S(D)
      • P(j);N_GUARD::S(I)
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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).