MESON Chess Problem Database
Problem Display
PID: 109068 (8/2N2N1B/K5p1/4Pk2/4R2P/2Br1qP1/5P2/1Q6 w - - 0 1)
Nelson, Nels H
Checkmate, 1903
#2
11 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Kxe4
- 2.Sd6#
- 1...Qd1
- 2.Rf4#
- 1...Qh1
- 2.Rf4#
- 1...Qe2
- 2.Rf4#
- 1...Qg2
- 2.Rf4#
- 1...Qxe4
- 2.Sh6#
- 1...Qh5
- 2.Rf4#
- 1...Qf4
- 2.Rxf4#
- 1...Rd1
- 2.Sh6#
- 2.Rf4#
- 1...Rd2
- 2.Sh6#
- 2.Rf4#
- 1...Rxc3
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Re3
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Rd4
- 2.Sh6#
- 2.Rf4#
- 1...Rd5
- 2.Sh6#
- 2.Rf4#
- 1...Rd6+
- 2.Sxd6#
- 1...Rd7
- 2.Sh6#
- 2.Rf4#
- 1...Rd8
- 2.Sh6#
- 2.Rf4#
- 1...Kxe4
- Tries
- 1.Qxd3?
- threat
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 2.Qxf3#
- 1...Qxe4
- 2.Sh6#
- 2.Qd7#
- 1...Qxf2
- 2.Sd6#
- 2.Sh6#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.g4#
- 1...Qxg3
- 2.Sd6#
- 2.Sh6#
- 1...Qf4
- 2.Rxf4#
- 1...Qd1
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Qh1
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 2.g4#
- 1...Qe2
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Qg2
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Qg4
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Qh5
- 2.Sd6#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 1...Qe3
- 2.Sd6#
- 2.Rf4#
- 2.g4#
- 1...Qxd3+!
- threat
- 1.Qe1?
- threat
- 2.Sh6#
- 1...Rd6+
- 2.Sxd6#
- 1...Qe2
- 2.Rf4#
- 1...Qf4
- 2.Rxf4#
- 1...Re3
- 2.Sd6#
- 1...Qh5
- 2.Rf4#
- 1...Qe3!
- threat
- 1.Qb4?
- threat
- 2.Sh6#
- 1...Rd6+
- 2.Sxd6#
- 1...Qf4
- 2.Rxf4#
- 1...Qh5
- 2.Rf4#
- 1...Qe3
- 2.g4#
- 1...Rd4!
- threat
- 1.Qb7?
- threat
- 2.Sh6#
- 1...Rd6+
- 2.Sxd6#
- 1...Qf4
- 2.Rxf4#
- 1...Qh5
- 2.Rf4#
- 1...Qe3
- 2.g4#
- 1...Rd5!
- threat
- 1.Qxd3?
- Keys
- 1.Qh1!
- 1...Rd6+
- 2.Sxd6#
- 1...Kxe4
- 2.Bxg6#
- 1...Qxh1
- 2.Rf4#
- 1...Qxe4
- 2.Sh6#
- 1...Qxf2
- 2.Sh6#
- 2.g4#
- 1...Qxg3
- 2.Sh6#
- 1...Rxc3
- 2.Sd6#
- 1...Qd1
- 2.Sh6#
- 2.Rf4#
- 1...Qe2
- 2.Sh6#
- 2.Rf4#
- 1...Qg2
- 2.Rf4#
- 1...Qg4
- 2.Sh6#
- 1...Qh5
- 2.Rf4#
- 1...Qe3
- 2.g4#
- 1...Qf4
- 2.Rxf4#
- 1...Rd1
- 2.Qxf3#
- 1...Rd2
- 2.Qxf3#
- 1...Re3
- 2.Sd6#
- 1...Rd4
- 2.Qxf3#
- 1...Rd5
- 2.Qxf3#
- 1...Rd7
- 2.Qxf3#
- 1...Rd8
- 2.Qxf3#
- 1...Rd6+
- 1.Qh1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 11
- REMOVED MATES = 2
- Sets
- K(c);P_SPINR(a),S_FLIGHT,XR(E)::S(J)
- Q(b);N_GUARD::R1(E)
- Q(b);SBLOCK,XR(E)::S(J)
- Q(b);N_GUARD::R1(E),XQ(b)
- R(a);CHECK,N_GUARD::S(J),XR(a)
- Tries
- Try
- Q(A);XR(a)
- Threat
- DUALS(4)
- Vars
- Q(b);::QAB(A)+R(E),DCHECK,XQ(b)
- Refutation
- Q(b);CHECK,XQ(A)
- Try
- Q(A);
- Threat
- S(J)
- Vars
- R(a);CHECK,N_GUARD::S(J),XR(a)
- Q(b);N_GUARD::R1(E)
- Q(b);N_GUARD::R1(E),XQ(b)
- R(a);N_GUARD::S(J)
- Refutation
- Q(b);
- Try
- Q(A);
- Threat
- S(J)
- Vars
- R(a);CHECK,N_GUARD::S(J),XR(a)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD::R1(E)
- Q(b);N_GUARD::P(D)
- Refutation
- R(a);
- Try
- Q(A);
- Threat
- S(J)
- Vars
- R(a);CHECK,N_GUARD::S(J),XR(a)
- Q(b);N_GUARD::R1(E),XQ(b)
- Q(b);N_GUARD::R1(E)
- Q(b);N_GUARD::P(D)
- Refutation
- R(a);
- Try
- Actual
- Q(A);
- Vars
- R(a);CHECK,N_GUARD::S(J),XR(a)
- K(c);P_SPINQ(b),S_FLIGHT,XR(E)::B(K),XP(d)
- Q(b);N_GUARD,XQ(A)::R1(E)
- Q(b);XR(E)::S(J)
- Q(b);XP(D)::S(J)
- R(a);N_GUARD,XB(C)::S(J)
- Q(b);N_GUARD::R1(E)
- Q(b);::S(J)
- Q(b);N_GUARD::P(D)
- Q(b);N_GUARD::R1(E),XQ(b)
- R(a);N_GUARD::QAR2(A),XQ(b)
- R(a);N_GUARD::S(J)
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).