MESON Chess Problem Database

Problem Display
PID: 214965 (1B6/4N2B/1K1n2np/R1pPk1N1/4p2P/b1P1Q1P1/8/8 w - - 0 1)

van der Linden, AFC

Suomen Shakki, 1956

1B6/4N2B/1K1n2np/R1pPk1N1/4p2P/b1P1Q1P1/8/8

#2

11 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sxh4
      • 2.Qf4#
    • 1...Sf8
      • 2.Qf4#
    • 1...Sh8
      • 2.Qf4#
    • 1...c4
      • 2.Qd4#
    • 1...hxg5
      • 2.Qxg5#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Bxd6#
      • 1...c4
        • 2.Qd4#
      • 1...Sxe7!
    • 1.Sc6+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf6!
    • 1.Sxg6+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf6!
    • 1.Qf2?
      • threat
        • 2.Sf7#
        • 2.Qf5#
      • 1...Sxh4
        • 2.Sf7#
        • 2.Qf4#
      • 1...hxg5
        • 2.Qf5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh8
        • 2.Qf4#
        • 2.Qf5#
      • 1...e3
        • 2.Qf5#
      • 1...Sxe7!
  • Keys
    • 1.Sg8!
      • threat
        • 2.Qxe4#
      • 1...Kxd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf4#
      • 1...hxg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(f);N_GUARD::QAB1(B),XS(f)
    • S(f);N_GUARD,XP(D)::QAB1(B)
    • S(f);N_GUARD::QAB1(B)
    • P(c);N_GUARD::QAB1(B)
    • P(g);OGATE,XS(G)::QAR2(B),XP(g)
  • Tries
    • Try
      • S(G);XP(b)
      • Threat
        • B(K),XS(e)
      • Vars
        • P(c);N_GUARD::QAB1(B)
      • Refutation
        • S(f);XS(I)
    • Try
      • S(I);CHECK
      • Vars
        • K(d);N_SPINP(b),N_SPINS(e),P-FLIGHT,P_SPINP(c),XP(F)::QAR1(B)
        • K(d);N_SPINP(b),N_SPINS(e),P-FLIGHT,P_SPINS(f)::QAR1(B)
      • Refutation
        • K(d);N_SPINP(b),N_SPINS(e),S_FLIGHT
    • Try
      • S(I);CHECK,XS(f)
      • Vars
        • K(d);N_SPINP(b),N_SPINS(e),P-FLIGHT,P_SPINP(c),XP(F)::QAR1(B)
        • K(d);N_SPINP(b),N_SPINS(e),P-FLIGHT::QAR1(B)
      • Refutation
        • K(d);N_SPINP(b),N_SPINS(e),S_FLIGHT
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);XS(G)::QAR1(B)
        • S(f);N_GUARD::QAB1(B),XS(f)
        • P(b);::QAR1(B)
      • Refutation
        • S(f);XS(I)
  • Actual
    • S(I);
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(d);N_SPINP(b),N_SPINS(e),P-FLIGHT,P_SPINP(c),XP(F)::QAR1(B)
      • K(d);N_SPINP(b),N_SPINS(e),P-FLIGHT,P_SPINS(f)::QAR1(B)
      • P(g);OGATE,XS(G)::QAR2(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).