MESON Chess Problem Database
Problem Display
PID: 250578 (5Q1B/4p2B/5qRp/4p2r/NNPk4/1KpP3r/4R3/7b w - - 0 1)
Ulanov, Leonid
Schweizerische Schachzeitung, 1997
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxd3
- 2.Sc2#
- 1...Rf3
- 2.Re4#
- 1...Be4
- 2.Rxe4#
- 1...e6
- 2.Qc5#
- 1...Rxd3
- Tries
- 1.Rg4+?
- 1...Qf4
- 2.Sc2#
- 1...Be4
- 2.Rexe4#
- 2.Rgxe4#
- 1...e4!
- 1...Qf4
- 1.Rg5?
- threat
- 2.Sc2#
- 1...Qb6
- 2.Bxe5#
- 1...Qg6
- 2.Bxe5#
- 1...Be4
- 2.Rxe4#
- 1...c2
- 2.Sxc2#
- 1...e4
- 2.Qd8#
- 1...Qf5!
- threat
- 1.Rxf6?
- threat
- 2.Sc2#
- 1...e4
- 2.Rd6#
- 1...Be4
- 2.Rxe4#
- 1...c2
- 2.Sxc2#
- 1...Rf5!
- threat
- 1.Qd8+?
- 1...Bd5
- 2.Re4#
- 2.Qxd5#
- 1...Qd6!
- 1...Bd5
- 1.Rg4+?
- Keys
- 1.Rg3!
- threat
- 2.Sc2#
- 1...e4
- 2.Sc6#
- 1...Qb6
- 2.Qf2#
- 1...c2
- 2.Sxc2#
- threat
- 1.Rg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(c);SBLOCK,XP(C)::S(E)
- R(c);S_CUTB(a)::R1(A)
- B(a);N_GUARD::R1(A),XB(a)
- P(i);OGATE::QAB1(I)
- Tries
- Try
- R(G);CHECK
- Vars
- Q(g);P_SPINP(e),P_SPINQ(g)::S(E)
- Refutation
- P(e);P_SPINP(e),P_SPINQ(g)
- Try
- R(G);
- Threat
- S(E)
- Vars
- Q(g);OGATE,P_PINS(E),P_SPINP(e)::B(J),XP(e)
- Q(g);OGATE,P_SPINP(e)::B(J),XP(e)
- B(a);N_GUARD::R1(A),XB(a)
- P(b);P_PINP(C)::S(E),XP(b)
- P(e);P_SPINQ(g),S_CUTB(a)::QAR(I)
- Refutation
- Q(g);P_SPINP(e)
- Try
- R(G);XQ(g)
- Threat
- S(E)
- Vars
- P(e);::B(J)+R(G),DCHECK
- B(a);N_GUARD::R1(A),XB(a)
- P(b);P_PINP(C)::S(E),XP(b)
- Refutation
- R(f);
- Try
- Q(I);CHECK
- Refutation
- Q(g);P_SPINP(e),P_SPINQ(g)
- Try
- Actual
- R(G);
- Threat
- S(E)
- Vars
- P(e);P_SPINQ(g),S_CUTB(a)::S(E)
- Q(g);OGATE,P_PINS(E),P_SPINP(e)::QAB(I)
- P(b);::S(E),XP(b)
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).