MESON Chess Problem Database
Problem Display
PID: 165049 (3Q3K/5R2/8/1Pp2n1N/2Npk3/r6P/3R1B2/8 w - - 0 1)
Evans, TC
The Observer, 1927
(First published on Sun Apr 17 1927)
#2
9 + 5
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Kf3
- 2.Qd5#
- 1...Rb3
- 2.Qa8#
- 1...Rc3
- 2.Qa8#
- 1...Rd3
- 2.Qa8#
- 1...Re3
- 2.Qa8#
- 1...Rf3
- 2.Qa8#
- 1...Rg3
- 2.Qa8#
- 1...Rxh3
- 2.Qa8#
- 1...Ra8
- 2.Qxa8#
- 1...Se3
- 2.Sg3#
- 2.Rf4#
- 1...Sg3
- 2.Rf4#
- 1...Sh4
- 2.Rf4#
- 1...Sh6
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sg7
- 2.Rf4#
- 1...Kf3
- Tries
- 1.Sb6?
- threat
- 2.Qd5#
- 1...Kf3
- 2.Qd5#
- 1...Ke5
- 2.Qd5#
- 1...Se3
- 2.Qe7#
- 2.Qe8#
- 1...Sd6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Ra8!
- threat
- 1.Rxf5?
- threat
- 2.Sd6#
- 2.Rf4#
- 2.Qd5#
- 1...Rf3
- 2.Sd6#
- 2.Re5#
- 2.Qd5#
- 1...Ra6
- 2.Sg3#
- 2.Rf4#
- 2.Qd5#
- 1...Ra8
- 2.Sd6#
- 2.Sg3#
- 2.Rf4#
- 1...Kxf5!
- threat
- 1.Re7+?
- 1...Kf3
- 2.Qd5#
- 1...Sxe7!
- 1...Kf3
- 1.Qe7+?
- 1...Kf3
- 2.Qb7#
- 1...Kd5
- 2.Sb6#
- 1...Sxe7!
- 1...Kf3
- 1.Qd7?
- threat
- 2.Qxf5#
- 2.Qc6#
- 2.Qb7#
- 1...Kf3
- 2.Qc6#
- 2.Qd5#
- 2.Qb7#
- 1...Rf3
- 2.Qc6#
- 2.Qe6#
- 2.Qb7#
- 1...Ra6
- 2.Qxf5#
- 1...Ra7
- 2.Qxf5#
- 2.Qc6#
- 1...Se3
- 2.Sg3#
- 2.Rf4#
- 2.Qe6#
- 1...Sg3
- 2.Rf4#
- 2.Qc6#
- 2.Qe6#
- 2.Qb7#
- 1...Sh4
- 2.Rf4#
- 2.Qc6#
- 2.Qe6#
- 2.Qb7#
- 1...Sd6
- 2.Qc6#
- 2.Qe6#
- 1...Sh6
- 2.Rf4#
- 2.Qc6#
- 2.Qe6#
- 2.Qb7#
- 1...Se7
- 2.Rf4#
- 2.Qe6#
- 1...Sg7
- 2.Rf4#
- 2.Qc6#
- 2.Qb7#
- 1...Ra8+!
- threat
- 1.Qc8?
- threat
- 2.Qxf5#
- 2.Qb7#
- 2.Qc6#
- 1...Kf3
- 2.Qb7#
- 2.Qc6#
- 1...Rf3
- 2.Qe6#
- 2.Qb7#
- 2.Qc6#
- 2.Qa8#
- 1...Ra6
- 2.Qxf5#
- 1...Ra7
- 2.Qxf5#
- 2.Qc6#
- 1...Ra8
- 2.Qxa8#
- 1...Se3
- 2.Qe6#
- 1...Sg3
- 2.Qe6#
- 2.Qb7#
- 2.Qc6#
- 1...Sh4
- 2.Qe6#
- 2.Qb7#
- 2.Qc6#
- 1...Sd6
- 2.Qe6#
- 2.Qc6#
- 1...Sh6
- 2.Qe6#
- 2.Qb7#
- 2.Qc6#
- 1...Se7
- 2.Qe6#
- 1...Sg7
- 2.Qb7#
- 2.Qc6#
- 1...Kd5!
- threat
- 1.Sb6?
- Keys
- 1.Qg8!
- 1...Kf3
- 2.Qg4#
- 1...Kd5
- 2.Re7#
- 1...Rxh3
- 2.Qa8#
- 1...Ra1
- 2.Qg2#
- 1...Ra2
- 2.Qg2#
- 1...Rb3
- 2.Qa8#
- 1...Rc3
- 2.Qa8#
- 1...Rd3
- 2.Qa8#
- 1...Re3
- 2.Qa8#
- 1...Rf3
- 2.Qa8#
- 1...Rg3
- 2.Qa8#
- 1...Ra4
- 2.Qg2#
- 1...Ra5
- 2.Qg2#
- 1...Ra6
- 2.Qg2#
- 1...Ra7
- 2.Qg2#
- 1...Ra8
- 2.Qxa8#
- 1...Se3
- 2.Rf4#
- 1...Sg3
- 2.Rf4#
- 1...Sh4
- 2.Rf4#
- 1...Sd6
- 2.Rf4#
- 1...Sh6
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sg7
- 2.Rf4#
- 1...d3
- 2.Qg2#
- 1...Kf3
- 1.Qg8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 10
- REMOVED MATES = 0
- Sets
- K(c);P_SPINS(e),S_FLIGHT::QAB(H)
- R(a);N_GUARD::QAB(H)
- R(a);N_GUARD,SBLOCK::QAB(H)
- R(a);N_GUARD,P_PINS(F),XP(C)::QAB(H)
- R(a);N_GUARD,P_PINQ(H)::QAB(H),XR(a)
- S(e);OGATE::R1(G)
- Tries
- Try
- S(D);
- Threat
- QAB1(H)
- Vars
- K(c);P_SPINS(e),S_FLIGHT::QAB(H)
- K(c);P-FLIGHT::QAR1(H)
- S(e);N_GUARD::QAR(H)
- S(e);N_GUARD::QAR(H),XS(e)
- Refutation
- R(a);P_PINQ(H)
- Try
- R(G);XS(e)
- Threat
- DUALS(3)
- Refutation
- K(c);S_FLIGHT,XR(G)
- Try
- R(G);CHECK
- Vars
- K(c);S_FLIGHT::QAB(H)
- Refutation
- S(e);XR(G)
- Try
- Q(H);CHECK
- Vars
- K(c);P_SPINS(e),S_FLIGHT::QAB(H)
- K(c);P_SPINP(b),S_FLIGHT::S(D)
- Refutation
- S(e);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- R(a);::QAB1(H),XS(e)
- Refutation
- R(a);CHECK
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- R(a);::QAB1(H),XS(e)
- R(a);N_GUARD,P_PINQ(H)::QAB(H),XR(a)
- S(e);::QAR2(H)
- Refutation
- K(c);P_SPINP(b),S_FLIGHT
- Try
- Actual
- Q(H);
- Vars
- K(c);P_SPINS(e),S_FLIGHT::QAB1(H)
- K(c);P_SPINP(b),S_FLIGHT::QAB(H)+R(G)
- R(a);N_GUARD,P_PINS(F),XP(C)::QAB(H)
- R(a);N_GUARD::QAB(H)
- R(a);N_GUARD,SBLOCK::QAB(H)
- R(a);N_GUARD,P_PINQ(H)::QAB(H),XR(a)
- S(e);OGATE::R1(G)
- P(b);S_CUTR(a)::QAB(H)
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).