MESON Chess Problem Database

Problem Display
PID: 32834 (7n/b1P2p2/p1rN3K/3BkNP1/b3P3/B1p3P1/3P4/1Q6 w - - 0 1)

Nietvelt, Gustaaf Josephus

The Problemist, 1928

7n/b1P2p2/p1rN3K/3BkNP1/b3P3/B1p3P1/3P4/1Q6

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Sxc4#
    • 1...Rc5
      • 2.d4#
    • 1...Rb6
      • 2.d4#
    • 1...Rxd6+
      • 2.Bxd6#
    • 1...Bb8
      • 2.d4#
    • 1...Sg6
      • 2.Sxf7#
  • Tries
    • 1.Bc5?
      • threat
        • 2.d4#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...cxd2
        • 2.Qa1#
        • 2.Qb2#
      • 1...Bxc5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qe8#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Rxc7
        • 2.Sc4#
      • 1...Bxb8
        • 2.d4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Rc5
        • 2.d4#
      • 1...Rb6
        • 2.d4#
      • 1...Sg6
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(e);N_PINS(I)::S(I),XR(e)
    • R(e);N_PINS(I),S_CUTB(f)::P(B)
    • R(e);S_CUTB(f)::P(B)
    • R(e);CHECK,OGATE,XS(I)::B(C),XR(e)
    • B(f);N_GUARD::P(B)
    • S(h);N_PINS(I)::S(I),XP(g)
  • Tries
    • Try
      • B(C);
      • Threat
        • P(B)
      • Vars
        • R(e);CHECK,OGATE,XS(I)::B(C),XR(e)
      • Refutation
        • B(f);XB(C)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • R(e);CHECK,OGATE,XS(I)::B(C),XR(e)
      • R(e);N_PINS(I),XP(K)::S(I)
      • B(f);N_GUARD,XQ(A)::P(B)
      • R(e);N_PINS(I)::S(I),XR(e)
      • R(e);N_PINS(I),S_CUTB(f)::P(B)
      • R(e);S_CUTB(f)::P(B)
      • S(h);N_PINS(I)::S(I),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).