MESON Chess Problem Database

Problem Display
PID: 188586 (2n5/4PK2/B2P4/1N3k1p/4pP1R/1pr5/2nr1PPN/1bB1RQ2 w - - 0 1)

Nield, Joshua

To Alain White, 1945

2n5/4PK2/B2P4/1N3k1p/4pP1R/1pr5/2nr1PPN/1bB1RQ2

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rxh5#
    • 1...Re2
      • 2.Rxh5#
    • 1...Rxf2
      • 2.Rxh5#
    • 1...Rdd3
      • 2.Rxh5#
    • 1...Rd4
      • 2.Rxh5#
    • 1...Rd5
      • 2.Rxh5#
    • 1...Rxd6
      • 2.Rxh5#
    • 1...Rcd3
      • 2.Bxc8#
    • 1...Re3
      • 2.Bxc8#
    • 1...Rf3
      • 2.Bxc8#
    • 1...Rg3
      • 2.Bxc8#
    • 1...Rh3
      • 2.Bxc8#
  • Tries
    • 1.Sd4+?
      • 1...Rxd4
        • 2.Rxh5#
      • 1...Sxd4!
    • 1.Bxd2?
      • threat
        • 2.Rxh5#
      • 1...Sxd6+
        • 2.Sxd6#
      • 1...Re3
        • 2.Bxc8#
      • 1...Rg3
        • 2.Bxc8#
      • 1...Rh3
        • 2.Bxc8#
      • 1...Se3
        • 2.Sd4#
      • 1...e3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxe4#
      • 1...Sxd6+
        • 2.Sxd6#
      • 1...Rdxd3
        • 2.Rxh5#
      • 1...Rcxd3
        • 2.Bxc8#
      • 1...Sxe1
        • 2.Sd4#
      • 1...exd3
        • 2.Re5#
      • 1...Re2
        • 2.Rxh5#
        • 2.Qd5#
      • 1...Rc4
        • 2.Qh3#
      • 1...Sa1
        • 2.Sd4#
      • 1...Sa3
        • 2.Sd4#
      • 1...Se3
        • 2.Sd4#
      • 1...Sb4
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 10
  • Sets
    • R(c);::R(H),XP(h)
    • R(c);XP(D)::R(H),XP(h)
    • R(c);XP(K)::R(H),XP(h)
    • R(e);N_GUARD::B(J),XS(i)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • R(c);XS(I)::R(H),XP(h)
      • Refutation
        • S(b);XS(I)
    • Try
      • B(A);XR(c)
      • Threat
        • R(H),XP(h)
      • Vars
        • S(i);CHECK,XP(K)::S(I),XS(i)
        • R(e);N_GUARD::B(J),XS(i)
        • S(b);N_GUARD::S(I)
      • Refutation
        • P(f);
  • Actual
    • Q(C);P_PINP(f)
    • Threat
      • QAB1(C),XP(f)
    • Vars
      • S(i);CHECK,XP(K)::S(I),XS(i)
      • R(c);N_SPINP(f),XQ(C)::R(H),XP(h)
      • R(e);N_GUARD,N_SPINP(f),XQ(C)::B(J),XS(i)
      • S(b);N_GUARD,XR(B)::S(I)
      • P(f);N_SPINP(f),OGATE,XQ(C)::R1(B)
      • R(e);N_GUARD::QAB(C)
      • S(b);N_GUARD::S(I)
      • S(b);N_GUARD::S(I),XS(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).