MESON Chess Problem Database

Problem Display
PID: 201495 (NNb2B2/p2Qn1b1/r2n4/2k1p3/rpP3R1/1p2P2K/3P4/2R4B w - - 0 1)

Rietveld, Johannes Jacob

3rd HM., L'Italia Scacchistica, 1922

NNb2B2/p2Qn1b1/r2n4/2k1p3/rpP3R1/1p2P2K/3P4/2R4B

#2

11 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd7
      • 2.Sxd7#
    • 1...Sxc4
      • 2.Rcxc4#
      • 2.Rgxc4#
      • 2.Qd5#
    • 1...Se4
      • 2.Qd5#
    • 1...Sb5
      • 2.Qd5#
      • 2.cxb5#
    • 1...Sdf5
      • 2.Qd5#
    • 1...Sb7
      • 2.Qd5#
    • 1...Sf7
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
    • 1...Sd5
      • 2.Qb5#
      • 2.cxd5#
    • 1...Sef5
      • 2.Qb5#
    • 1...Sc6
      • 2.Bxd6#
      • 2.Qxd6#
    • 1...Sg6
      • 2.Qb5#
    • 1...Sg8
      • 2.Qb5#
  • Tries
    • 1.Sxa6+?
      • 1...Bxa6
        • 2.Qxa7#
      • 1...Rxa6!
    • 1.Qxc8+?
      • 1...Rc6
        • 2.Sd7#
      • 1...Sc6
        • 2.Sd7#
      • 1...Sexc8
        • 2.Sd7#
      • 1...Sdxc8!
    • 1.Qxa7+?
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rxa7!
    • 1.Qc7+?
      • 1...Sc6
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Rc6!
  • Keys
    • 1.Rg5!
      • threat
        • 2.d4#
      • 1...Bxd7+
        • 2.Sxd7#
      • 1...Sb5
        • 2.cxb5#
      • 1...Sdf5
        • 2.Qd5#
      • 1...Sd5
        • 2.cxd5#
      • 1...Sef5
        • 2.Qb5#
      • 1...Sc6
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(k);P_PINR(G),XQ(H)::S(J),XB(k)
    • S(g);OGATE,P_SPINS(i)::QAR1(H)
    • S(i);P_SPINS(g)::QAR1(H)
  • Tries
    • Try
      • S(J);CHECK,XR(f)
      • Vars
        • B(k);XS(J)::QAB(H),XP(h)
      • Refutation
        • R(b);XS(J)
    • Try
      • Q(H);CHECK,XB(k)
      • Vars
        • R(f);P_SPINR(f)::S(J)
        • S(i);P_SPINS(i)::S(J)
        • S(i);P_SPINS(g),XQ(H)::S(J)
      • Refutation
        • S(g);P_SPINS(i),XQ(H)
    • Try
      • Q(H);CHECK,P_SPINR(G),XP(h)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(H),XR(f)
      • Refutation
        • R(f);XQ(H)
    • Try
      • Q(H);CHECK,P_SPINR(G)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • R(G);P_PINP(e),P_SPINQ(H)
    • Threat
      • P(C)
    • Vars
      • B(k);CHECK,XQ(H)::S(J),XB(k)
      • S(g);OGATE,P_SPINS(i)::R(A)+P(F),XS(g)
      • S(g);N_PINQ(H),N_SPINP(e),P_SPINS(i)::QAR1(H)
      • S(i);N_SPINP(e),OGATE,P_SPINS(g)::R(A)+P(F),XS(i)
      • S(i);N_PINQ(H),N_SPINP(e),P_SPINS(g)::QAR1(H)
      • S(i);OGATE,P_SPINS(g)::B(K),XS(g)
HTML5 logo

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).