MESON Chess Problem Database

Problem Display
PID: 59606 (b6b/1BrN4/4R3/p1Qrn3/Rn2k1p1/2KpN1B1/3PP3/8 w - - 0 1)

Drese, Gerardus Hendrikus

Koldijk, Albert Marinus

Sammelius, Carel Johan Robert

de Jong, Leonard Nicholaas

1st Prize, Tijdschrift vd KNSB 17. TT, 1940

b6b/1BrN4/4R3/p1Qrn3/Rn2k1p1/2KpN1B1/3PP3/8

#2

10 + 10

56 The Problemist 2005
56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Sxc5#
    • 1...Rxb7
      • 2.Qxd5#
    • 1...Rxd7
      • 2.Qd4#
      • 2.Qc4#
    • 1...Bf6
      • 2.Sxf6#
  • Tries
    • 1.Bxa8?
      • threat
        • 2.Bxd5#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Rxd7
        • 2.Qd4#
        • 2.Qc4#
      • 1...Rb7
        • 2.Qxd5#
      • 1...Rc6!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rf4#
      • 1...Rxc5+
        • 2.Sxc5#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Sxd7
        • 2.exd3#
      • 1...Sf3
        • 2.exd3#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sc6
        • 2.Qxd5#
      • 1...Sg6
        • 2.exd3#
      • 1...Sf7
        • 2.exd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(h);CHECK,XQ(G)::S(J),XR(h)
    • R(h);N_PINQ(G),N_SPINR(f),XB(I)::QAB1(G),XR(f)
    • B(j);N_GUARD::S(J),XB(j)
  • Tries
    • Try
      • B(I);XB(i)
      • Threat
        • B(I),XR(f)
      • Vars
        • R(h);CHECK,XQ(G)::S(J),XR(h)
        • R(h);N_PINQ(G),N_SPINR(f)::QAB1(G),XR(f)
      • Refutation
        • R(h);N_SPINR(f)
  • Actual
    • R(H);
    • Threat
      • R1(H)
    • Vars
      • R(h);CHECK,XQ(G)::S(J),XR(h)
      • B(j);XR(H)::S(J),XB(j)
      • S(g);N_GUARD,P_PINR(H),XS(J)::P(B),XP(a)
      • S(g);N_GUARD,P_PINR(H)::P(B),XP(a)
      • S(g);N_PINQ(G),N_SPINS(b),P_PINR(H)::QAR1(G)
      • S(g);N_PINQ(G),N_SPINR(f),P_PINR(H)::QAB1(G),XR(f)
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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).