MESON Chess Problem Database
Problem Display
PID: 237665 (8/3R1p2/2n1pB2/1NpNn2Q/1pr1k3/1Bp5/2P1P3/4R2K w - - 0 1)
Sahlberg, Robert
English Mechanic and World of Science, 1881
(First published on Fri May 20 1881)
#2
10 + 9
| 15239 | Valois Notebooks | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Rd4
- Tries
- 1.Kg1?
- 1...Sf3+
- 2.Qxf3#
- 2.exf3#
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sf3+
- 1.Kg2?
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sxd7
- 1.Kh2?
- 1...Sf3+
- 2.Qxf3#
- 2.exf3#
- 1...Sg4+
- 2.Qxg4#
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sf3+
- 1.Sd6+?
- 1...Kd4
- 2.Rd1#
- 1...Kxd5!
- 1...Kd4
- 1.Ra1?
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sxd7
- 1.Rb1?
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sxd7
- 1.Rc1?
- 1...Sxd7
- 2.Sd6#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sxd7
- 1.Rd1?
- threat
- 2.Sd6#
- 1...Sd4
- 2.Qxe5#
- 1...exd5!
- threat
- 1.Rf1?
- threat
- 2.Rf4#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...exd5!
- threat
- 1.Rg1?
- 1...Sxd7
- 2.Sd6#
- 2.Rg4#
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Rg4#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Rxg4#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Sxd7
- 1.Ra7?
- 1...Kxd5
- 2.e4#
- 1...Sxa7
- 2.Qxe5#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Kxd5
- 1.Rb7?
- 1...Kxd5
- 2.e4#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Kxd5
- 1.Rc7?
- 1...Kxd5
- 2.e4#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Kxd5
- 1.Rxf7?
- 1...Kxd5
- 2.e4#
- 1...Sxf7
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...exd5!
- 1...Kxd5
- 1.Rd8?
- 1...Sxd8
- 2.Qxe5#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.Qh7#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.Qg4#
- 2.Qh7#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 2.Qxg4#
- 2.Qh7#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Se7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...exd5!
- 1...Sxd8
- 1.Qh4+?
- 1...Sg4
- 2.Qxg4#
- 2.Qh7#
- 1...Kf5!
- 1...Sg4
- 1.Qg5?
- threat
- 2.Qf4#
- 1...Sxd7
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.cxd3#
- 1...Sg6
- 2.Sd6#
- 1...exd5!
- threat
- 1.Kg1?
- Keys
- 1.Re7!
- 1...Kxd5
- 2.e4#
- 1...Sxe7
- 2.Qxe5#
- 1...exd5
- 2.Qf3#
- 1...Rd4
- 2.Sd6#
- 1...Sd3
- 2.Sd6#
- 2.Qf3#
- 2.cxd3#
- 2.exd3#
- 1...Sf3
- 2.Sd6#
- 2.Qxf3#
- 2.exf3#
- 1...Sg4
- 2.Sd6#
- 1...Sg6
- 2.Sd6#
- 2.Qf3#
- 1...Sd7
- 2.Sd6#
- 2.Qf3#
- 1...Sd4
- 2.Qxe5#
- 1...Sa5
- 2.Qxe5#
- 1...Sa7
- 2.Qxe5#
- 1...Sb8
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Kxd5
- 1.Re7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- K(B);S_FLIGHT
- Vars
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- K(B);P-FLIGHT
- Vars
- S(f);CHECK,N_GUARD::QAR2(H),XS(f)
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- S(F);CHECK
- Vars
- K(d);P-FLIGHT,P_SPINS(f)::R(A)
- Refutation
- K(d);P_SPINR(c),P_SPINS(f),S_FLIGHT,XS(G)
- Try
- R(A);
- Vars
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(A);
- Vars
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(A);
- Vars
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(A);
- Threat
- S(F)
- Vars
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(A);
- Threat
- R1(A)
- Refutation
- P(h);XS(G)
- Try
- R(A);
- Vars
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(J);
- Vars
- K(d);OGATE,P_SPINR(c),P_SPINS(f),S_FLIGHT,XS(G)::P(D)
- S(g);N_GUARD,XR(J)::QAR1(H),XS(f)
- R(c);SBLOCK::S(F)
- S(f);::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(J);
- Vars
- K(d);OGATE,P_SPINR(c),P_SPINS(f),S_FLIGHT,XS(G)::P(D)
- R(c);SBLOCK::S(F)
- S(f);::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(J);
- Vars
- K(d);OGATE,P_SPINR(c),P_SPINS(f),S_FLIGHT,XS(G)::P(D)
- R(c);SBLOCK::S(F)
- S(f);::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(J);XP(i)
- Vars
- K(d);OGATE,P_SPINR(c),P_SPINS(f),S_FLIGHT,XS(G)::P(D)
- S(f);N_GUARD,XR(J)::QAB1(H)
- R(c);SBLOCK::S(F)
- S(f);::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- R(J);
- Vars
- S(g);N_GUARD,XR(J)::QAR1(H),XS(f)
- R(c);SBLOCK::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
- Refutation
- P(h);XS(G)
- Try
- Q(H);CHECK
- Refutation
- K(d);S_FLIGHT
- Try
- Q(H);
- Threat
- QAR1(H)
- Vars
- S(f);XR(J)::S(F)
- S(f);::S(F)
- Refutation
- P(h);XS(G)
- Try
- Actual
- R(J);
- Vars
- K(d);OGATE,P_SPINR(c),P_SPINS(f),S_FLIGHT,XS(G)::P(D)
- S(g);N_GUARD,XR(J)::QAR1(H),XS(f)
- P(h);P_SPINS(f),SBLOCK,XS(G)::QAB1(H)
- R(c);SBLOCK::S(F)
- S(f);P_SPINP(h)::S(F)
- S(g);N_GUARD::QAR1(H),XS(f)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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