MESON Chess Problem Database

Problem Display
PID: 79982 (4N3/6K1/1B2ppQ1/N2kp1nR/2p3B1/5P2/8/b5r1 w - - 0 1)

Santos, Vasco

Vinagre, Jose C

2nd Prize, A Bola, 1948

4N3/6K1/1B2ppQ1/N2kp1nR/2p3B1/5P2/8/b5r1

#2

8 + 8

133 The Problemist Supplement 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3
      • 2.Bxf3#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
      • 2.fxe4#
    • 1...Sf7
      • 2.Qe4#
    • 1...Sh7
      • 2.Qe4#
    • 1...c3
      • 2.Qd3#
    • 1...e4
      • 2.Qxe4#
  • Tries
    • 1.Qd3+?
      • 1...Bd4
        • 2.Qxc4#
      • 1...cxd3!
    • 1.Qf7?
      • threat
        • 2.Qb7#
        • 2.Qd7#
      • 1...Sxf3
        • 2.Qb7#
      • 1...e4
        • 2.Qxe6#
      • 1...Se4
        • 2.Qxe6#
        • 2.Qb7#
      • 1...Sxf7!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Qd8#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Se4
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qxe6#
      • 1...e4
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(f);OGATE,P_SPINP(e),XP(A)::B(B),XS(f)
    • S(f);N_GUARD,P_SPINP(e)::QAB1(F)
    • P(c);N_GUARD,S_CUTB(a)::QAR2(F)
    • P(e);P_SPINS(f)::QAB1(F),XP(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAB1(F),XP(c)
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);P_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);N_SPINP(g),P_PINB(B),P_SPINP(e),XP(A)::QAB(F)
        • P(e);P_SPINS(f)::QAB1(F),XP(g)
      • Refutation
        • S(f);N_SPINP(g),P_PINB(B),P_SPINP(e),XQ(F)
  • Actual
    • Q(F);XP(h)
    • Threat
      • QAR(F)
    • Vars
      • S(f);OGATE,P_PINB(B),P_SPINP(e),XP(A)::QAB(F),XS(f)
      • S(f);N_GUARD,P_PINB(B),P_SPINP(e)::QAB1(F),XP(g)
      • P(e);P_PINQ(F),P_SPINS(f)::B(B),XP(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).