MESON Chess Problem Database

Problem Display
PID: 229142 (2BK4/2NN2p1/2pP1p2/1qR5/4k2n/r1P5/6P1/5QB1 w - - 0 1)

Noteboom, Daniel

Arnhemsche Courant, 1926

2BK4/2NN2p1/2pP1p2/1qR5/4k2n/r1P5/6P1/5QB1

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Rxc4#
      • 2.Qxc4#
    • 1...Qb1
      • 2.Rc4#
      • 2.Qc4#
    • 1...Qb2
      • 2.Rc4#
      • 2.Qc4#
    • 1...Qa5
      • 2.Rc4#
      • 2.Qc4#
    • 1...Qb6
      • 2.Qc4#
    • 1...Qb7
      • 2.Rc4#
      • 2.Qc4#
    • 1...Qb8
      • 2.Rc4#
      • 2.Qc4#
    • 1...Sxg2
      • 2.Qf5#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sf5
      • 2.Qf3#
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qf3#
      • 2.Qf5#
    • 1...g5
      • 2.Sxf6#
    • 1...g6
      • 2.Sxf6#
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Qc4#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Sxg2
        • 2.Qf5#
      • 1...cxb5
        • 2.Bb7#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sf5
        • 2.Qf3#
        • 2.Qxf5#
      • 1...Ra4!
    • 1.Qe2+?
      • 1...Kf4
        • 2.Bh2#
      • 1...Qxe2!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Rf4#
      • 1...Qxf1
        • 2.Sc5#
      • 1...Qxf5
        • 2.Qc4#
      • 1...Sxg2
        • 2.Qf3#
      • 1...Sxf5
        • 2.Qf3#
      • 1...Qe2
        • 2.Sc5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Qe5
        • 2.Qb1#
      • 1...Sg6
        • 2.Qf3#
      • 1...g5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD,P_PINS(G)::QAR2(A)
    • S(c);N_GUARD,XP(C)::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
    • P(g);N_GUARD::S(H),XP(f)
  • Tries
    • Try
      • S(G);XQ(d)
      • Threat
        • QAR2(A)
      • Vars
        • R(a);XP(D)::S(G),XR(a)
        • S(c);N_GUARD,XP(C)::QAB1(A)
        • P(e);OGATEB,XS(G)::B(I)
        • S(c);N_GUARD::QAB1(A),XS(c)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • Q(d);XQ(A)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • Q(d);N_GUARD,XQ(A)::S(H)
      • Q(d);N_GUARD,SBLOCK,XR(E)::QAR2(A)
      • S(c);N_GUARD,XP(C)::QAB1(A)
      • S(c);N_GUARD,XR(E)::QAB1(A)
      • Q(d);N_GUARD::S(H)
      • S(c);N_GUARD::QAB1(A),XS(c)
      • Q(d);N_GUARD::QAB(A)
      • S(c);N_GUARD::QAB1(A)
      • P(g);N_GUARD::S(H),XP(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).