MESON Chess Problem Database
Problem Display
PID: 202297 (R7/4BrN1/6p1/8/2p2kp1/2Q2P2/2n2P1K/8 w - - 0 1)
Charvat, Prokop
L'Alfiere di Re, 1923
#2
7 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rf5
- 2.Se6#
- 1...Rf6
- 2.Qxf6#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...Rf8
- 2.Rxf8#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...g3+
- 2.fxg3#
- 1...g5
- 2.Bd6#
- 1...Rf5
- Tries
- 1.Bh4?
- 1...g3+
- 2.fxg3#
- 1...Rxg7
- 2.Qf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf5
- 2.Se6#
- 1...Rf6
- 2.Qxf6#
- 1...Ra7
- 2.Qf6#
- 1...Rb7
- 2.Qf6#
- 1...Rc7
- 2.Qf6#
- 1...Rd7
- 2.Qf6#
- 1...Re7
- 2.Qf6#
- 1...Rf8
- 2.Rxf8#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...g5
- 2.Bg3#
- 1...gxf3!
- 1...g3+
- 1.Ra5?
- threat
- 2.Se6#
- 2.Bg5#
- 2.Bd6#
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Bg5#
- 2.Bd6#
- 2.Qf6#
- 1...Se3
- 2.Qxe3#
- 1...Rf5
- 2.Se6#
- 1...Rf6
- 2.Qxf6#
- 1...Sd4
- 2.Bg5#
- 2.Bd6#
- 2.Qe3#
- 1...g5
- 2.Sh5#
- 2.Se6#
- 2.Bxg5#
- 2.Bd6#
- 1...gxf3!
- threat
- 1.Rb8?
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...Rf6
- 2.Qxf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf8
- 2.Rxf8#
- 1...Rf5
- 2.Se6#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...g5
- 2.Bd6#
- 1...gxf3!
- 1...g3+
- 1.Rc8?
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...Rf6
- 2.Qxf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf8
- 2.Rxf8#
- 1...Rf5
- 2.Se6#
- 1...Sa1
- 2.Rxc4#
- 2.Qe3#
- 1...Se1
- 2.Rxc4#
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Rxc4#
- 2.Qe3#
- 1...g5
- 2.Bd6#
- 1...gxf3!
- 1...g3+
- 1.Rd8?
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...Rf6
- 2.Qxf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf8
- 2.Rxf8#
- 1...Rf5
- 2.Se6#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...g5
- 2.Bd6#
- 1...gxf3!
- 1...g3+
- 1.Re8?
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...Rf6
- 2.Qxf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf8
- 2.Rxf8#
- 1...Rf5
- 2.Se6#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...g5
- 2.Bd6#
- 1...gxf3!
- 1...g3+
- 1.Rg8?
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...Rf6
- 2.Qxf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf8
- 2.Rxf8#
- 1...Rf5
- 2.Se6#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...g5
- 2.Bd6#
- 1...gxf3!
- 1...g3+
- 1.Qd2+?
- 1...Ke5
- 2.Ra5#
- 2.Qd6#
- 1...Se3
- 2.Qxe3#
- 1...Kxf3!
- 1...Ke5
- 1.Bh4?
- Keys
- 1.Rh8!
- 1...g3+
- 2.fxg3#
- 1...Rxe7
- 2.Qf6#
- 1...Rxg7
- 2.Qf6#
- 1...gxf3
- 2.Rh4#
- 1...Rf6
- 2.Qxf6#
- 1...Se3
- 2.Qxe3#
- 1...Sd4
- 2.Qe3#
- 1...Rf8
- 2.Rxf8#
- 1...Rf5
- 2.Se6#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...g5
- 2.Bd6#
- 1...g3+
- 1.Rh8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(f);SBLOCK::S(F)
- R(f);N_GUARD::QAR2(C),XR(f)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- R(f);OGATEB::R(G),XR(f)
- S(a);N_GUARD::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- P(d);CHECK,OGATE::P(A),XP(d)
- P(e);SBLOCK::B(E)
- Tries
- Try
- B(E);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XS(F)::QAR2(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);SBLOCK::S(F)
- R(f);N_GUARD::QAR2(C),XR(f)
- R(f);N_GUARD::QAR2(C)
- R(f);OGATEB::R(G),XR(f)
- P(e);SBLOCK::B(E)
- Refutation
- P(d);XP(D)
- Try
- R(G);
- Threat
- DUALS(3)
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- R(f);::S(F)
- R(f);N_GUARD::QAR2(C),XR(f)
- Refutation
- P(d);XP(D)
- Try
- R(G);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- R(f);N_GUARD::QAR2(C),XR(f)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);OGATEB::R(G),XR(f)
- R(f);SBLOCK::S(F)
- P(e);SBLOCK::B(E)
- Refutation
- P(d);XP(D)
- Try
- R(G);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- R(f);N_GUARD::QAR2(C),XR(f)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);OGATEB::R(G),XR(f)
- R(f);SBLOCK::S(F)
- P(e);SBLOCK::B(E)
- Refutation
- P(d);XP(D)
- Try
- R(G);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- R(f);N_GUARD::QAR2(C),XR(f)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);OGATEB::R(G),XR(f)
- R(f);SBLOCK::S(F)
- P(e);SBLOCK::B(E)
- Refutation
- P(d);XP(D)
- Try
- R(G);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- R(f);N_GUARD::QAR2(C),XR(f)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);OGATEB::R(G),XR(f)
- R(f);SBLOCK::S(F)
- P(e);SBLOCK::B(E)
- Refutation
- P(d);XP(D)
- Try
- R(G);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- R(f);N_GUARD::QAR2(C),XR(f)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);OGATEB::R(G),XR(f)
- R(f);SBLOCK::S(F)
- P(e);SBLOCK::B(E)
- Refutation
- P(d);XP(D)
- Try
- Q(C);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(C),XS(a)
- Refutation
- K(c);P-FLIGHT,XP(D)
- Try
- Actual
- R(G);
- Vars
- P(d);CHECK,OGATE::P(A),XP(d)
- R(f);N_GUARD,XB(E)::QAR2(C)
- R(f);N_GUARD,XS(F)::QAR2(C)
- P(d);OGATEB,XP(D)::R(G)
- R(f);N_GUARD::QAR2(C),XR(f)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD::QAB1(C)
- R(f);OGATEB::R(G),XR(f)
- R(f);SBLOCK::S(F)
- P(e);SBLOCK::B(E)
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).