MESON Chess Problem Database
Problem Display
PID: 151493 (1Q3R2/1br5/2p3rb/1B6/8/2PPkpBN/2P1pN2/3nK3 w - - 0 1)
Alaikov, Venelin
Probleemblad, 1983
#2
10 + 9
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Rg4
- 2.Sxg4#
- 1...Rg5
- 2.Bf4#
- 1...Rd6
- 2.Sg4#
- 1...Re6
- 2.Sg4#
- 1...Rf6
- 2.Sg4#
- 1...Rd7
- 2.Qe5#
- 1...Rf7
- 2.Qe5#
- 1...Rg7
- 2.Qe5#
- 1...Rh7
- 2.Qe5#
- 1...Rc8
- 2.Qe5#
- 1...Bf4
- 2.Bxf4#
- 1...Bg5
- 2.Sg4#
- 1...Bg7
- 2.Bf4#
- 1...Bxf8
- 2.Bf4#
- 1...Sxf2
- 2.Bxf2#
- 1...Rg4
- Tries
- 1.Sg5?
- threat
- 2.Sg4#
- 2.Bf4#
- 2.Rxf3#
- 1...Rxg5
- 2.Bf4#
- 1...Bxg5
- 2.Sg4#
- 1...Bxf8
- 2.Sg4#
- 1...Sxf2
- 2.Bxf2#
- 2.Bf4#
- 2.Rxf3#
- 1...cxb5
- 2.Sg4#
- 2.Bf4#
- 1...Rf6
- 2.Sg4#
- 1...Rf7
- 2.Sg4#
- 2.Qe5#
- 1...Bc8
- 2.Bf4#
- 2.Rxf3#
- 1...c5
- 2.Sg4#
- 2.Bf4#
- 1...Sxc3!
- threat
- 1.Re8+?
- 1...Re6
- 2.Sg4#
- 2.Rxe6#
- 1...Re7!
- 1...Re6
- 1.Qxc7?
- threat
- 2.Qe5#
- 1...Sxf2
- 2.Bxf2#
- 1...cxb5
- 2.Qc5#
- 1...Rg4
- 2.Sxg4#
- 1...Rg5
- 2.Bf4#
- 2.Qf4#
- 1...Rd6
- 2.Sg4#
- 1...Re6
- 2.Sg4#
- 1...Bf4
- 2.Bxf4#
- 2.Qxf4#
- 1...Bg7
- 2.Bf4#
- 2.Qf4#
- 1...c5
- 2.Qxc5#
- 1...Sxc3!
- threat
- 1.Qe8+?
- 1...Re6
- 2.Sg4#
- 2.Qxe6#
- 1...Re7!
- 1...Re6
- 1.Sg5?
- Keys
- 1.Bxc6!
- threat
- 2.Rxf3#
- 2.Qa7#
- 1...Rxg3
- 2.Qa7#
- 1...Rgxc6
- 2.Sg4#
- 1...Rcxc6
- 2.Qe5#
- 1...Bxf8
- 2.Bf4#
- 1...Bxc6
- 2.Qb6#
- 1...Sxc3
- 2.Qa7#
- 1...Rg4
- 2.Sxg4#
- 2.Rxf3#
- 1...Rg5
- 2.Bf4#
- 2.Rxf3#
- 1...Rd6
- 2.Sg4#
- 2.Rxf3#
- 1...Rf6
- 2.Sg4#
- 2.Qa7#
- 1...Rd7
- 2.Rxf3#
- 2.Qe5#
- 1...Rf7
- 2.Qe5#
- 2.Qa7#
- 1...Bf4
- 2.Bxf4#
- 2.Qa7#
- 1...Bg7
- 2.Bf4#
- 2.Rxf3#
- 1...Ba6
- 2.Rxf3#
- 2.Qb6#
- 1...Ba8
- 2.Rxf3#
- 2.Qb6#
- 1...Bc8
- 2.Rxf3#
- 2.Qb6#
- threat
- 1.Bxc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 14
- Sets
- R(f);N_GUARD::S(C),XR(f)
- R(f);S_CUTB(g)::B(F)
- R(f);N_GUARD::S(C)
- R(i);OGATE::QAR2(I)
- B(g);N_GUARD::B(F),XB(g)
- B(g);S_CUTR(f)::S(C)
- B(g);N_GUARD::B(F)
- B(g);N_GUARD,XR(J)::B(F)
- S(a);OGATE,XS(C)::B(F),XS(a)
- Tries
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(f);XS(G)::B(F)
- B(g);XS(G)::S(C)
- B(g);XR(J)::S(C)
- R(f);::S(C)
- Refutation
- S(a);XP(D)
- Try
- R(J);CHECK
- Refutation
- R(i);P_SPINR(i)
- Try
- Q(I);XR(i)
- Threat
- QAR2(I)
- Vars
- S(a);OGATE,XS(C)::B(F),XS(a)
- P(e);OGATE,XB(H)::QAB(I)
- R(f);N_GUARD::S(C),XR(f)
- R(f);N_GUARD::S(C)
- P(e);OGATE::QAB(I),XP(e)
- Refutation
- S(a);XP(D)
- Try
- Q(I);CHECK
- Refutation
- R(i);P_SPINR(i)
- Try
- Actual
- B(H);XP(e)
- Threat
- DUALS(2)
- Vars
- R(f);XB(F)::QAB(I)
- R(f);N_GUARD,XB(H)::S(C)
- R(i);OGATE,XB(H)::QAR2(I)
- B(g);N_GUARD,XR(J)::B(F)
- B(h);OGATE,XB(H)::QAB(I)
- S(a);XP(D)::QAB(I)
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).