MESON Chess Problem Database

Problem Display
PID: 109176 (1B4Q1/5N2/3pp3/5Np1/2Rpk1p1/5nK1/2P2R2/1B6 w - - 0 1)

Pirrone, Santi

3rd HM., Banska Bystrica 03. TT, 1960-1961

1B4Q1/5N2/3pp3/5Np1/2Rpk1p1/5nK1/2P2R2/1B6

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Rxd4#
    • 1...Sg1
      • 2.Rxd4#
    • 1...Sd2
      • 2.Rxd4#
    • 1...Sh2
      • 2.Rxd4#
    • 1...Sh4
      • 2.Rxd4#
    • 1...Se5
      • 2.Rxd4#
    • 1...d5
      • 2.c3#
    • 1...e5
      • 2.S7xd6#
  • Tries
    • 1.Rxd4+?
      • 1...Kxf5
        • 2.Qxg5#
      • 1...Sxd4!
  • Keys
    • 1.Sd8!
      • 1...Kd5
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kxf5
        • 2.Qxe6#
      • 1...exf5
        • 2.Re2#
      • 1...Se1
        • 2.Qxe6#
      • 1...Sg1
        • 2.Qxe6#
      • 1...Sd2
        • 2.Qxe6#
      • 1...Sh2
        • 2.Qxe6#
      • 1...Sh4
        • 2.Qxe6#
      • 1...Se5
        • 2.Rxd4#
      • 1...d5
        • 2.c3#
      • 1...e5
        • 2.c3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 6
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R1(E),XP(b)
    • P(f);SBLOCK::B(A)+P(B)
    • P(g);SBLOCK::S(G),XP(f)
  • Tries
    • Try
      • R(E);CHECK,XP(b)
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT,XS(F)::QAR1(I),XP(e)
      • Refutation
        • S(a);XR(E)
  • Actual
    • S(G);
    • Vars
      • K(c);N_SPINP(b),P_SPINP(g),S_FLIGHT::QAB1(I),XP(g)
      • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(f)::QAR1(I),XP(g)
      • K(c);N_SPINP(b),P_SPINS(a),S_FLIGHT,XS(F)::QAB1(I),XP(g)
      • P(g);SBLOCK,XS(F)::R(C)
      • S(a);N_GUARD::QAR2(I),XP(g)
      • S(a);N_GUARD,SBLOCK::R1(E),XP(b)
      • P(f);SBLOCK::B(A)+P(B)
      • P(g);SBLOCK::B(A)+P(B)
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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).