MESON Chess Problem Database
Problem Display
PID: 144584 (1BK3BN/1QpRp1nR/1N3k2/2p5/4PP2/4np1q/b5p1/8 w - - 0 1)
Nietvelt, Gustaaf Josephus
4th HM., Budafoki MTE, 1931
#2
10 + 10
| 38 | Magyar Sakkvilag | 1931 |
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Rh6#
- 1...Qxd7+
- 2.Sxd7#
- 1...Qh6
- 2.Rxh6#
- 1...Sc4
- 2.Sd5#
- 1...Sef5
- 2.e5#
- 1...Sgf5
- 2.e5#
- 1...Se6
- 2.Rf7#
- 1...cxb6
- 2.Be5#
- 1...c6
- 2.Be5#
- 1...e6
- 2.Rf7#
- 1...Qe6
- Tries
- 1.Qc6+?
- 1...Qe6
- 2.Rh6#
- 1...Se6
- 2.Rf7#
- 1...e6
- 2.Rf7#
- 1...Be6!
- 1...Qe6
- 1.Qc6+?
- Keys
- 1.Qa6!
- threat
- 2.Sd5#
- 1...Qxd7+
- 2.Sxd7#
- 1...cxb6
- 2.Be5#
- 1...Qe6
- 2.Rh6#
- 1...Bd5
- 2.Sxd5#
- 1...Be6
- 2.Qa1#
- 1...Sd5
- 2.Sxd5#
- 1...Se6
- 2.Rf7#
- 1...c6
- 2.Be5#
- 1...e6
- 2.Rf7#
- threat
- 1.Qa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- Q(e);N_GUARD::R(F)
- Q(e);CHECK,XR(E)::S(C),XQ(e)
- Q(e);N_GUARD,N_PINR(E)::R(F),XQ(e)
- S(c);N_GUARD,S_CUTB(a)::S(C)
- S(c);N_PINR(E),SBLOCK::P(A)
- S(j);N_PINR(E),SBLOCK::P(A)
- S(j);N_PINR(E),OGATE,SBLOCK::R1(F)
- P(h);OGATE,XS(C)::B(G)
- P(h);OGATE::B(G)
- P(i);N_PINR(E),SBLOCK::R1(E)
- Tries
- Try
- Q(D);CHECK
- Vars
- Q(e);P_SPINQ(e)::R(F)
- S(j);N_PINR(E),OGATE,P_SPINS(j)::R1(F)
- P(i);N_PINR(E),P_SPINP(i)::R1(E)
- Refutation
- B(a);P_SPINB(a)
- Try
- Actual
- Q(D);
- Threat
- QAR(D)+S(C),DCHECK
- Vars
- Q(e);CHECK,XR(E)::QAR(D)+S(C),DCHECK,XQ(e)
- P(h);OGATE,P_SPINP(h),XS(C)::B(G)
- Q(e);N_GUARD::R(F)
- B(a);::QAR(D)+S(C),DCHECK,XB(a)
- B(a);OGATE::QAB(D)
- S(c);::QAR(D)+S(C),DCHECK,XS(c)
- S(j);N_PINR(E),OGATE,SBLOCK::R1(F)
- P(h);OGATE::B(G)
- P(i);N_PINR(E),SBLOCK::R1(E)
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).