MESON Chess Problem Database
Problem Display
PID: 207248 (n1BrN3/rp1p3R/1p3K1p/3k4/N4P1p/4PPbP/1P3nQ1/2R5 w - - 0 1)
Demasure, Armand
Neue Berliner Schachzeitung, 1869
#2
12 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxa4
- 2.Bxb7#
- 1...Ra5
- 2.Bxb7#
- 1...Ra6
- 2.Bxb7#
- 1...Rxc8
- 2.Rxd7#
- 1...Rxe8
- 2.Rxd7#
- 1...Bh2
- 2.Qg8#
- 1...Bxf4
- 2.Qg8#
- 1...Sd1
- 2.Qd2#
- 1...Sh1
- 2.Qd2#
- 1...Sxh3
- 2.Qd2#
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Sc7
- 2.Sxb6#
- 1...b5
- 2.Rc5#
- 1...h5
- 2.Rxh5#
- 1...d6
- 2.Be6#
- 1...Rxa4
- Tries
- 1.Bxd7?
- threat
- 2.Be6#
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxd7
- 2.Rxd7#
- 1...Sc7
- 2.Sxb6#
- 1...Rxe8!
- threat
- 1.Rc2?
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxa4
- 2.Bxb7#
- 1...Rxc8
- 2.Rxd7#
- 1...Rxe8
- 2.Rxd7#
- 1...Bxf4
- 2.Qg8#
- 1...Sxh3
- 2.Qd2#
- 1...Ra5
- 2.Bxb7#
- 1...Ra6
- 2.Bxb7#
- 1...Bh2
- 2.Qg8#
- 1...Sd1
- 2.Qd2#
- 1...Sh1
- 2.Qd2#
- 1...Sc7
- 2.Sxb6#
- 1...b5
- 2.Rc5#
- 1...h5
- 2.Rxh5#
- 1...d6
- 2.Be6#
- 1...Sd3!
- 1...Se4+
- 1.Rc3?
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxa4
- 2.Bxb7#
- 1...Rxc8
- 2.Rxd7#
- 1...Rxe8
- 2.Rxd7#
- 1...Bxf4
- 2.Qg8#
- 1...Sxh3
- 2.Qd2#
- 1...Ra5
- 2.Bxb7#
- 1...Ra6
- 2.Bxb7#
- 1...Bh2
- 2.Qg8#
- 1...Sd1
- 2.Qd2#
- 1...Sh1
- 2.Qd2#
- 1...Sc7
- 2.Sxb6#
- 1...b5
- 2.Rc5#
- 1...h5
- 2.Rxh5#
- 1...d6
- 2.Be6#
- 1...Sd3!
- 1...Se4+
- 1.Rc7?
- threat
- 2.Sc3#
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxa4
- 2.Bxb7#
- 1...Rxe8
- 2.Rhxd7#
- 1...Sd1
- 2.Qd2#
- 1...Sxc7!
- threat
- 1.Re7?
- threat
- 2.Re5#
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxe8
- 2.Rxd7#
- 1...Bxf4
- 2.Qg8#
- 1...d6
- 2.Be6#
- 1...Sd3!
- threat
- 1.Qxf2?
- threat
- 2.Qd2#
- 2.e4#
- 1...Rxa4
- 2.Bxb7#
- 1...Rxe8
- 2.Rxd7#
- 2.Qd2#
- 1...Bxf2!
- threat
- 1.b3?
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxa4
- 2.Bxb7#
- 1...Rxc8
- 2.Rxd7#
- 1...Rxe8
- 2.Rxd7#
- 1...Bxf4
- 2.Qg8#
- 1...Sxh3
- 2.Qd2#
- 1...Ra5
- 2.Bxb7#
- 1...Ra6
- 2.Bxb7#
- 1...Bh2
- 2.Qg8#
- 1...Sd1
- 2.Qd2#
- 1...Sh1
- 2.Qd2#
- 1...Sc7
- 2.Sxb6#
- 1...b5
- 2.Rc5#
- 1...h5
- 2.Rxh5#
- 1...d6
- 2.Be6#
- 1...Sd3!
- 1...Se4+
- 1.Bxd7?
- Keys
- 1.b4!
- 1...Se4+
- 2.fxe4#
- 1...Sg4+
- 2.fxg4#
- 1...Rxa4
- 2.Bxb7#
- 1...Rxc8
- 2.Rxd7#
- 1...Rxe8
- 2.Rxd7#
- 1...Bxf4
- 2.Qg8#
- 1...Sxh3
- 2.Qa2#
- 2.Qd2#
- 1...Sd3
- 2.Qa2#
- 1...Ra5
- 2.Bxb7#
- 1...Ra6
- 2.Bxb7#
- 1...Bh2
- 2.Qg8#
- 1...Sd1
- 2.Qa2#
- 2.Qd2#
- 1...Sh1
- 2.Qa2#
- 2.Qd2#
- 1...Sc7
- 2.Sxb6#
- 1...b5
- 2.Rc5#
- 1...h5
- 2.Rxh5#
- 1...d6
- 2.Be6#
- 1...Se4+
- 1.b4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- R(g);N_GUARD::B(K),XP(h)
- R(k);N_GUARD,XB(K)::R(J),XP(i)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- B(b);OGATE::QAB(C)
- B(b);OGATE,XP(H)::QAB(C)
- S(a);OGATE::QAR(C)
- S(a);OGATE,XP(F)::QAR(C)
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- S(j);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::R1(A)
- P(f);OGATE::R(J),XP(f)
- P(i);OGATE::B(K)
- Tries
- Try
- B(K);XP(i)
- Threat
- B(K)
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(k);OGATE,XB(K)::R(J),XR(k)
- S(j);N_GUARD::S(G),XP(e)
- Refutation
- R(k);XS(L)
- Try
- R(A);
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- R(k);N_GUARD,XB(K)::R(J),XP(i)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- B(b);OGATE,XP(H)::QAB(C)
- S(a);OGATE,XP(F)::QAR(C)
- R(g);N_GUARD::B(K),XP(h)
- B(b);OGATE::QAB(C)
- S(a);OGATE::QAR(C)
- S(j);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::R1(A)
- P(f);OGATE::R(J),XP(f)
- P(i);OGATE::B(K)
- Refutation
- S(a);
- Try
- R(A);
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- R(k);N_GUARD,XB(K)::R(J),XP(i)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- B(b);OGATE,XP(H)::QAB(C)
- S(a);OGATE,XP(F)::QAR(C)
- R(g);N_GUARD::B(K),XP(h)
- B(b);OGATE::QAB(C)
- S(a);OGATE::QAR(C)
- S(j);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::R1(A)
- P(f);OGATE::R(J),XP(f)
- P(i);OGATE::B(K)
- Refutation
- S(a);
- Try
- R(A);
- Threat
- S(G)
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- S(a);OGATE::QAR(C)
- Refutation
- S(j);XR(A)
- Try
- R(J);
- Threat
- R1(J)
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- B(b);OGATE,XP(H)::QAB(C)
- P(i);OGATE::B(K)
- Refutation
- S(a);
- Try
- Q(C);XS(a)
- Threat
- DUALS(2)
- Vars
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- Refutation
- B(b);XQ(C)
- Try
- P(B);
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- R(k);N_GUARD,XB(K)::R(J),XP(i)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- B(b);OGATE,XP(H)::QAB(C)
- S(a);OGATE,XP(F)::QAR(C)
- R(g);N_GUARD::B(K),XP(h)
- B(b);OGATE::QAB(C)
- S(a);OGATE::QAR(C)
- S(j);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::R1(A)
- P(f);OGATE::R(J),XP(f)
- P(i);OGATE::B(K)
- Refutation
- S(a);
- Try
- Actual
- P(B);
- Vars
- S(a);CHECK,OGATE::P(E),XS(a)
- S(a);CHECK,OGATE::QAB(C)+P(E),XS(a)
- R(g);N_GUARD,XS(G)::B(K),XP(h)
- R(k);N_GUARD,XB(K)::R(J),XP(i)
- R(k);N_GUARD,XS(L)::R(J),XP(i)
- B(b);OGATE,XP(H)::QAB(C)
- S(a);OGATE::QAB(C)
- R(g);N_GUARD::B(K),XP(h)
- B(b);OGATE::QAB(C)
- S(j);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::R1(A)
- P(f);OGATE::R(J),XP(f)
- P(i);OGATE::B(K)
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).