MESON Chess Problem Database

Problem Display
PID: 263851 (R7/3N4/2p5/1q1p1B2/p2k1n2/1P1P3p/1r1Q1N1K/Br4R1 w - - 0 1)

Nietvelt, Gustaaf Josephus

Tijdschrift vd NSB, 1928

R7/3N4/2p5/1q1p1B2/p2k1n2/1P1P3p/1r1Q1N1K/Br4R1

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Rxa4#
    • 1...Rd1
      • 2.Bxb2#
    • 1...Re1
      • 2.Bxb2#
    • 1...Rf1
      • 2.Bxb2#
    • 1...Rxg1
      • 2.Bxb2#
    • 1...Sxd3
      • 2.Rg4#
  • Tries
    • 1.Qxb2+?
      • 1...Ke3
        • 2.Rg3#
      • 1...Rxb2!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qf2#
      • 1...Qxd3
        • 2.Rxa4#
      • 1...Rxa1
        • 2.Qxb2#
      • 1...Rxd1
        • 2.Bxb2#
      • 1...Sxd3
        • 2.Rg4#
      • 1...Se2
        • 2.Qe3#
      • 1...Sg2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD,P_SPINQ(g),XP(G)::R(J),XP(d)
    • R(a);N_GUARD::B(A),XR(b)
    • R(a);N_GUARD,XR(B)::B(A),XR(b)
    • S(f);OGATEB,P_SPINS(f),XP(G)::R(B)
  • Tries
    • Try
      • Q(C);CHECK,XR(b)
      • Vars
        • K(e);S_CUTR(a),S_FLIGHT::R(B)
      • Refutation
        • R(a);P_PINS(D),P_SPINR(a),XQ(C)
  • Actual
    • S(D);P_SPINQ(C)
    • Threat
      • QAB(C)
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XP(G)::R(J),XP(d)
      • R(a);N_GUARD,N_SPINR(b),XB(A)::QAB(C),XR(b)
      • R(a);N_GUARD,XS(D)::B(A),XR(b)
      • S(f);OGATEB,P_SPINS(f),XP(G)::R(B)
      • S(f);N_PINQ(C)::QAB1(C)
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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).