MESON Chess Problem Database
Problem Display
PID: 86652 (r2N4/3Q4/p2K1p2/8/1n1k1n2/1PpP1p1r/3N1P2/1BBR4 w - - 0 1)
Aloni, Yoel
US Problem Bulletin, 1993
#2
10 + 9
| 6490 | yacpdb | 2009 |
| 15148 | Sadier Collection | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Sxf3#
- 1...Rh2
- 2.Sxf3#
- 1...Rh4
- 2.Sxf3#
- 1...Rh5
- 2.Sxf3#
- 1...Rh6
- 2.Sxf3#
- 1...Rh7
- 2.Sxf3#
- 1...Rh8
- 2.Sxf3#
- 1...Ra7
- 2.Qxa7#
- 1...Sa2
- 2.Sc6#
- 1...Sbxd3
- 2.Sc6#
- 1...Sbd5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Se2
- 2.Se6#
- 1...Sg2
- 2.Se6#
- 1...Sfxd3
- 2.Se6#
- 1...Sfd5
- 2.Se6#
- 1...Sh5
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sg6
- 2.Se6#
- 1...cxd2
- 2.Bb2#
- 1...f5
- 2.Qg7#
- 1...Rh1
- Tries
- 1.Sc4?
- threat
- 2.Be3#
- 1...Sfxd3
- 2.Qg4#
- 1...c2
- 2.Bb2#
- 1...Sc2
- 2.Sc6#
- 1...Sbd5
- 2.Sc6#
- 1...Sg2
- 2.Se6#
- 1...Sfd5
- 2.Se6#
- 1...Sbxd3!
- threat
- 1.Se4?
- threat
- 2.Be3#
- 1...Sbxd3
- 2.Qa4#
- 1...Sc2
- 2.Sc6#
- 1...Sbd5
- 2.Sc6#
- 1...Sg2
- 2.Se6#
- 1...Sfd5
- 2.Se6#
- 1...Sfxd3!
- threat
- 1.Qf5?
- threat
- 2.Qe4#
- 2.Qxf4#
- 2.Qc5#
- 2.Qxf6#
- 1...Sbxd3
- 2.Sc6#
- 2.Qe4#
- 1...Sfxd3
- 2.Se6#
- 2.Qe4#
- 1...cxd2
- 2.Bb2#
- 2.Qc5#
- 2.Qxf6#
- 1...c2
- 2.Bb2#
- 1...Rh4
- 2.Sxf3#
- 2.Qe4#
- 2.Qc5#
- 2.Qxf6#
- 1...Rh5
- 2.Sxf3#
- 2.Qe4#
- 2.Qxf4#
- 1...Rh6
- 2.Sxf3#
- 2.Qe4#
- 2.Qxf4#
- 2.Qc5#
- 1...Rc8
- 2.Qe4#
- 2.Qxf4#
- 2.Qxf6#
- 1...Sc2
- 2.Sc6#
- 2.Qe4#
- 1...Sbd5
- 2.Sc6#
- 2.Qe4#
- 1...Sc6
- 2.Sxc6#
- 2.Qe4#
- 2.Qxf4#
- 2.Qc5#
- 1...Se2
- 2.Se6#
- 2.Qe4#
- 2.Qc5#
- 2.Qxf6#
- 1...Sg2
- 2.Se6#
- 2.Qe4#
- 2.Qc5#
- 2.Qxf6#
- 1...Sfd5
- 2.Se6#
- 2.Qe4#
- 1...Sh5
- 2.Se6#
- 2.Qe4#
- 2.Qc5#
- 1...Se6
- 2.Sxe6#
- 2.Qe4#
- 2.Qxf6#
- 1...Sg6
- 2.Se6#
- 2.Qe4#
- 2.Qc5#
- 1...Rxd8+!
- threat
- 1.Qc6?
- threat
- 2.Qe4#
- 2.Qc4#
- 2.Qc5#
- 2.Qb6#
- 1...Sbxd3
- 2.Qe4#
- 2.Qc4#
- 1...Sxc6
- 2.Sxc6#
- 1...Sfxd3
- 2.Se6#
- 2.Qe4#
- 2.Qc4#
- 1...cxd2
- 2.Bb2#
- 2.Qc4#
- 2.Qc5#
- 1...Sc2
- 2.Qe4#
- 2.Qc4#
- 1...c2
- 2.Qc4#
- 1...Rh5
- 2.Sxf3#
- 2.Qe4#
- 2.Qc4#
- 1...Rb8
- 2.Qe4#
- 2.Qc4#
- 2.Qc5#
- 1...Rc8
- 2.Qe4#
- 1...Sbd5
- 2.Qc4#
- 2.Qc5#
- 1...Sfd5
- 2.Se6#
- 2.Qc4#
- 2.Qc5#
- 1...Se6
- 2.Sxe6#
- 2.Qe4#
- 2.Qc4#
- 1...f5
- 2.Qc4#
- 2.Qc5#
- 2.Qb6#
- 1...Rxd8+!
- threat
- 1.Qe6?
- threat
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 2.Qxf6#
- 1...Sbxd3
- 2.Sc6#
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...Sfxd3
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...Sxe6
- 2.Sxe6#
- 1...cxd2
- 2.Bb2#
- 2.Qc4#
- 2.Qxf6#
- 1...Sc2
- 2.Qc4#
- 2.Qe4#
- 1...c2
- 2.Qc4#
- 1...Rh5
- 2.Sxf3#
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...Rh6
- 2.Sxf3#
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...Rc8
- 2.Qe3#
- 2.Qe4#
- 2.Qxf6#
- 1...Sbd5
- 2.Sc6#
- 2.Qe4#
- 1...Sc6
- 2.Sxc6#
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...Sg2
- 2.Qc4#
- 2.Qe4#
- 2.Qxf6#
- 1...Sfd5
- 2.Qe4#
- 1...Sh5
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...Sg6
- 2.Qc4#
- 2.Qe3#
- 2.Qe4#
- 1...f5
- 2.Qc4#
- 2.Qe3#
- 2.Qe5#
- 2.Qf6#
- 1...Rxd8+!
- threat
- 1.Qc8?
- threat
- 2.Qc4#
- 2.Qc5#
- 1...Sbxd3
- 2.Sc6#
- 2.Qc4#
- 1...Sfxd3
- 2.Se6#
- 2.Qc4#
- 1...Sc2
- 2.Qc4#
- 1...c2
- 2.Qc4#
- 1...Rh5
- 2.Sxf3#
- 2.Qc4#
- 1...Sc6
- 2.Sxc6#
- 1...Se6
- 2.Sxe6#
- 2.Qc4#
- 1...Rxc8!
- threat
- 1.Qf7?
- threat
- 2.Qc4#
- 2.Qxf6#
- 1...Sbxd3
- 2.Sc6#
- 2.Qc4#
- 1...Sfxd3
- 2.Se6#
- 2.Qc4#
- 1...Sc2
- 2.Qc4#
- 1...c2
- 2.Qc4#
- 1...Rh5
- 2.Sxf3#
- 2.Qc4#
- 1...Rh6
- 2.Sxf3#
- 2.Qc4#
- 1...Rc8
- 2.Qxf6#
- 1...Sbd5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 2.Qc4#
- 1...Sfd5
- 2.Se6#
- 1...Sh5
- 2.Se6#
- 2.Qc4#
- 1...Se6
- 2.Sxe6#
- 2.Qxf6#
- 1...Sg6
- 2.Se6#
- 2.Qc4#
- 1...f5
- 2.Qc4#
- 2.Qf6#
- 2.Qg7#
- 1...Rxd8+!
- threat
- 1.Qh7?
- threat
- 2.Qe4#
- 1...Rxh7
- 2.Sxf3#
- 1...cxd2
- 2.Bb2#
- 1...c2
- 2.Bb2#
- 1...Sg6
- 2.Se6#
- 1...f5
- 2.Qg7#
- 1...Rxd8+!
- threat
- 1.Sc4?
- Keys
- 1.Sf1!
- threat
- 2.Be3#
- 1...Sbxd3
- 2.Qa4#
- 1...Sfxd3
- 2.Qg4#
- 1...c2
- 2.Bb2#
- 1...Sc2
- 2.Sc6#
- 1...Sbd5
- 2.Sc6#
- 1...Sg2
- 2.Se6#
- 1...Sfd5
- 2.Se6#
- threat
- 1.Sf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 16
- Sets
- R(c);N_GUARD::S(D),XP(b)
- R(i);N_GUARD::QAB(I),XR(i)
- S(d);N_GUARD::S(J)
- S(d);N_GUARD,XP(G)::S(J)
- S(d);N_GUARD::S(J),XS(d)
- S(f);N_GUARD::S(J)
- S(f);N_GUARD,XP(G)::S(J)
- S(f);N_GUARD::S(J),XS(f)
- P(a);OGATEB,XS(D)::B(B)
- P(h);OGATEB::QAB(I)
- Tries
- Try
- S(D);
- Threat
- B(B)
- Vars
- S(f);OGATEB,P_SPINS(f),XP(G)::QAR(I)
- P(a);OGATEB::B(B)
- S(d);N_GUARD::S(J)
- S(f);N_GUARD::S(J)
- Refutation
- S(d);P_SPINS(d),XP(G)
- Try
- S(D);
- Threat
- B(B)
- Vars
- S(d);OGATEB,P_SPINS(d),XP(G)::QAR(I)
- S(d);N_GUARD::S(J)
- S(f);N_GUARD::S(J)
- Refutation
- S(f);P_SPINS(f),XP(G)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- P(a);OGATEB::B(B)
- Refutation
- R(i);CHECK,XS(J)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- S(d);XQ(I)::S(J),XS(d)
- P(a);::QAR1(I)
- R(i);::QAR1(I)
- Refutation
- R(i);CHECK,XS(J)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- S(f);XQ(I)::S(J),XS(f)
- P(a);::QAR1(I)
- S(f);::QAR1(I)
- Refutation
- R(i);CHECK,XS(J)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(d);::QAR1(I)
- P(a);::QAR1(I)
- S(d);N_GUARD::S(J),XS(d)
- Refutation
- R(i);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(d);::QAR1(I)
- P(a);::QAR1(I)
- R(i);::QAB(I),XP(h)
- S(d);N_GUARD::S(J)
- S(f);N_GUARD::S(J)
- Refutation
- R(i);CHECK,XS(J)
- Try
- Q(I);
- Threat
- QAR1(I)
- Vars
- R(c);N_GUARD,XQ(I)::S(D),XP(b)
- P(a);OGATEB,XS(D)::B(B)
- P(a);OGATEB::B(B)
- S(f);N_GUARD::S(J)
- P(h);OGATEB::QAB(I)
- Refutation
- R(i);CHECK,XS(J)
- Try
- Actual
- S(D);
- Threat
- B(B)
- Vars
- S(d);OGATEB,P_SPINS(d),XP(G)::QAR(I)
- S(f);OGATEB,P_SPINS(f),XP(G)::QAR(I)
- P(a);OGATEB::B(B)
- S(d);N_GUARD::S(J)
- S(f);N_GUARD::S(J)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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