MESON Chess Problem Database
Problem Display
PID: 202283 (8/4N3/1pr5/1NP1p3/n3k3/b3P1r1/4K1P1/3R2Q1 w - - 0 1)
Aprile, Giuseppe
L'Alfiere di Re, 1923
#2
8 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Rf3
- 2.gxf3#
- 1...Rxc5
- 2.Sd6#
- 1...Rd6
- 2.Sxd6#
- 1...Rc7
- 2.Sd6#
- 1...Rc8
- 2.Sd6#
- 1...Sb2
- 2.Sc3#
- 1...Sc3+
- 2.Sxc3#
- 1...Sxc5
- 2.Sc3#
- 1...Rxg2+
- Tries
- 1.Rd2?
- threat
- 2.Qb1#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Sc3+
- 2.Sxc3#
- 1...Rxc5
- 2.Sd6#
- 1...Sxc5
- 2.Sc3#
- 1...Rd6
- 2.Sxd6#
- 1...Sb2
- 2.Sc3#
- 1...Bc1!
- threat
- 1.Rd5?
- threat
- 2.Qb1#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Sc3+
- 2.Sxc3#
- 1...Rxc5
- 2.Sd6#
- 1...Sxc5
- 2.Sc3#
- 1...Sb2
- 2.Sc3#
- 1...Bc1!
- threat
- 1.Rd7?
- threat
- 2.Qb1#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Sc3+
- 2.Sxc3#
- 1...Rxc5
- 2.Sd6#
- 1...Sxc5
- 2.Sc3#
- 1...Rd6
- 2.Sxd6#
- 1...Sb2
- 2.Sc3#
- 1...Bc1!
- threat
- 1.Rd8?
- threat
- 2.Qb1#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Sc3+
- 2.Sxc3#
- 1...Rxc5
- 2.Sd6#
- 1...Sxc5
- 2.Sc3#
- 1...Rd6
- 2.Sxd6#
- 1...Sb2
- 2.Sc3#
- 1...Bc1!
- threat
- 1.Qf2?
- threat
- 2.Qf5#
- 1...Rxe3+
- 2.Qxe3#
- 1...Sc3+
- 2.Sxc3#
- 1...Rxg2
- 2.Qxg2#
- 1...Rf3
- 2.Qxf3#
- 2.gxf3#
- 1...Rg5
- 2.Qf3#
- 1...Rf6!
- threat
- 1.Rd2?
- Keys
- 1.Ra1!
- threat
- 2.Qb1#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxe3+
- 2.Qxe3#
- 1...Sc3+
- 2.Sxc3#
- 1...Rxc5
- 2.Sd6#
- 1...Sxc5
- 2.Sc3#
- 1...Rd6
- 2.Sxd6#
- 1...Bc1
- 2.Rxa4#
- 1...Sb2
- 2.Sc3#
- threat
- 1.Ra1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(b);CHECK,OGATE,XP(D)::QAB(B),XR(b)
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- R(b);OGATE::P(D),XR(b)
- R(g);N_GUARD,XP(G)::S(F)
- R(g);N_GUARD::S(F),XR(g)
- R(g);N_GUARD::S(F)
- S(c);N_GUARD::S(F)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- S(c);N_GUARD,XP(G)::S(F)
- Tries
- Try
- R(A);
- Threat
- QAB(B)
- Vars
- R(b);CHECK,OGATE,XP(D)::QAB(B),XR(b)
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- R(g);N_GUARD,XP(G)::S(F)
- S(c);N_GUARD,XP(G)::S(F)
- R(g);N_GUARD::S(F),XR(g)
- S(c);N_GUARD::S(F)
- Refutation
- B(a);
- Try
- R(A);
- Threat
- QAB(B)
- Vars
- R(b);CHECK,OGATE,XP(D)::QAB(B),XR(b)
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- R(g);N_GUARD,XP(G)::S(F)
- S(c);N_GUARD,XP(G)::S(F)
- S(c);N_GUARD::S(F)
- Refutation
- B(a);
- Try
- R(A);
- Threat
- QAB(B)
- Vars
- R(b);CHECK,OGATE,XP(D)::QAB(B),XR(b)
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- R(g);N_GUARD,XP(G)::S(F)
- S(c);N_GUARD,XP(G)::S(F)
- R(g);N_GUARD::S(F),XR(g)
- S(c);N_GUARD::S(F)
- Refutation
- B(a);
- Try
- R(A);
- Threat
- QAB(B)
- Vars
- R(b);CHECK,OGATE,XP(D)::QAB(B),XR(b)
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- R(g);N_GUARD,XP(G)::S(F)
- S(c);N_GUARD,XP(G)::S(F)
- R(g);N_GUARD::S(F),XR(g)
- S(c);N_GUARD::S(F)
- Refutation
- B(a);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- R(b);OGATE,P_PINQ(B),XP(D)::QAB(B),XR(b)
- R(b);N_GUARD::QAB1(B)
- Refutation
- R(g);
- Try
- Actual
- R(A);
- Threat
- QAB(B)
- Vars
- R(b);CHECK,OGATE,XP(D)::QAB(B),XR(b)
- R(b);CHECK,OGATE,XP(E)::QAR1(B),XR(b)
- S(c);CHECK,N_GUARD::S(F),XS(c)
- R(g);N_GUARD,XP(G)::S(F)
- S(c);N_GUARD,XP(G)::S(F)
- R(g);N_GUARD::S(F),XR(g)
- B(a);OGATE::R(A),XS(c)
- S(c);N_GUARD::S(F)
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).