MESON Chess Problem Database

Problem Display
PID: 92749 (4R2Q/1B1Nbp2/3B4/r3N2K/3k4/2pP3R/1nP3p1/7b w - - 0 1)

Nietvelt, Gustaaf Josephus

4th Prize, Echo des Sports, 1943

4R2Q/1B1Nbp2/3B4/r3N2K/3k4/2pP3R/1nP3p1/7b

#2

10 + 8

6490 yacpdb 2009
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.Bxe5#
      • 2.Qxe5#
    • 1...Bg5
      • 2.Sf3#
    • 1...Sxd3
      • 2.Rxd3#
  • Tries
    • 1.Bc5+?
      • 1...Bxc5
        • 2.Sf3#
        • 2.Sxf7#
      • 1...Rxc5!
    • 1.Qg7?
      • threat
        • 2.Qg4#
      • 1...Rxe5+
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Sxd3
        • 2.Rxd3#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1S
        • 2.Qxg1#
      • 1...g1B
        • 2.Qxg1#
      • 1...g1R
        • 2.Qxg1#
      • 1...Bg5
        • 2.Sf3#
      • 1...f5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg4#
      • 1...Rxe5+
        • 2.Bxe5#
      • 1...Sxd3
        • 2.Rxd3#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1S
        • 2.Qxg1#
      • 1...g1B
        • 2.Qxg1#
      • 1...g1R
        • 2.Qxg1#
      • 1...Bg5
        • 2.Sf3#
      • 1...f5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(g);N_PINS(D)::QAB(J)+S(D),DCHECK
    • S(b);OGATE,XP(B)::R1(C),XS(b)
  • Tries
    • Try
      • B(F);CHECK,N_SPINS(D)
      • Refutation
        • R(f);P_PINS(D),XB(F)
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • S(b);OGATE,XP(B)::R1(C),XS(b)
        • P(c);OGATE::QAB(J),XQ(c)
        • P(c);OGATE::QAB(J),XS(c)
        • P(c);OGATE::QAB(J),XB(c)
        • P(c);OGATE::QAB(J),XR(c)
        • B(g);N_PINS(D)::QAB(J)+S(D),DCHECK
      • Refutation
        • P(h);N_PINS(D)
  • Actual
    • Q(J);
    • Threat
      • QAR(J)
    • Vars
      • R(f);CHECK,OGATE,XS(D)::B(F),XR(f)
      • S(b);OGATE,XP(B)::R1(C),XS(b)
      • P(c);OGATE::QAB(J),XQ(c)
      • P(c);OGATE::QAB(J),XS(c)
      • P(c);OGATE::QAB(J),XB(c)
      • P(c);OGATE::QAB(J),XR(c)
      • B(g);N_PINS(D)::S(D)
      • P(h);N_PINS(D)::S(D)
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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).