MESON Chess Problem Database

Problem Display
PID: 194932 (1qBQ4/1p2N1p1/6KN/2p1kpn1/3R3b/2B4r/5p1n/4r2b w - - 0 1)

Rietveld, Johannes Jacob

1st HM., Dutch Federation, 1918

1qBQ4/1p2N1p1/6KN/2p1kpn1/3R3b/2B4r/5p1n/4r2b

#2

7 + 13

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Qxd6#
    • 1...Qa7
      • 2.Qc7#
      • 2.Qd6#
    • 1...Qc7
      • 2.Qxc7#
    • 1...Qa8
      • 2.Qc7#
      • 2.Qd6#
    • 1...Qxc8
      • 2.Qd6#
    • 1...Rf3
      • 2.Qd5#
    • 1...Bf3
      • 2.Ra4#
      • 2.Rb4#
      • 2.Rc4#
      • 2.Rg4#
      • 2.Rxh4#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bg3
      • 2.Ra4#
      • 2.Rb4#
      • 2.Rc4#
      • 2.Rg4#
      • 2.Rh4#
    • 1...Shf3
      • 2.Qd5#
    • 1...Sgf3
      • 2.Sf7#
      • 2.Qd5#
    • 1...Se6
      • 2.Sf7#
    • 1...Sf7
      • 2.Sxf7#
    • 1...Sh7
      • 2.Sf7#
    • 1...cxd4
      • 2.Qxd4#
    • 1...gxh6
      • 2.Qh8#
  • Tries
    • 1.Kxg7?
      • threat
        • 2.Sg6#
      • 1...Qxc8
        • 2.Qd6#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qc7
        • 2.Qxc7#
      • 1...Se6+!
  • Keys
    • 1.Kh5!
      • threat
        • 2.Sg6#
      • 1...Bf3+
        • 2.Rg4#
      • 1...Bg3+
        • 2.Rh4#
      • 1...g6+
        • 2.Sxg6#
      • 1...Kf6
        • 2.Rd6#
      • 1...Qxc8
        • 2.Qd6#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Qd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(m);CHECK,N_GUARD::QAB1(G),XQ(m)
    • Q(m);N_GUARD::QAB(G),XQ(m)
    • Q(m);N_GUARD,XB(F)::QAB1(G)
    • R(e);S_CUTB(b)::QAR1(G)
    • B(b);N_GUARD::QAR1(G),XB(b)
    • S(d);S_CUTB(b)::QAR1(G)
    • S(j);N_GUARD::S(D)
    • S(j);N_GUARD::S(D),XS(j)
    • P(g);OGATE,P_SPINP(g),XR(B)::QAB1(G),XP(g)
    • P(l);OGATEB,XS(D)::QAB(G)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(l)
      • Threat
        • S(E)
      • Vars
        • Q(m);N_GUARD,XB(F)::QAB1(G)
        • P(g);OGATE,P_SPINP(g),XR(B)::QAB1(G),XP(g)
        • Q(m);N_GUARD::QAB1(G),XQ(m)
        • Q(m);N_GUARD,P_PINS(E)::QAB(G),XQ(m)
      • Refutation
        • S(j);CHECK
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • S(E)
    • Vars
      • B(b);CHECK,S_CUTR(e)::B(A)+R(B)
      • B(f);CHECK,S_CUTR(e)::B(A)+R(B)
      • P(l);CHECK::S(E),XP(l)
      • K(h);S_FLIGHT::B(A)+R(B),DCHECK
      • Q(m);N_GUARD,XB(F)::QAB1(G)
      • P(g);OGATE,P_SPINP(g),XR(B)::QAB1(G),XP(g)
      • Q(m);N_GUARD::QAB1(G),XQ(m)
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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).