MESON Chess Problem Database
Problem Display
PID: 272759 (7n/1Nb1Bp2/3R4/r4kpP/2Q5/4R1K1/7n/1b6 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1957
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra2
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra3
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra4
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rf6#
- 1...Ra6
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra7
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra8
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ba2
- 2.Qd3#
- 2.Qc2#
- 2.Qe4#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Qxd3#
- 1...Be4
- 2.Qxe4#
- 1...Bb6
- 2.Rf6#
- 2.Qc8#
- 1...Bxd6+
- 2.Sxd6#
- 1...Bb8
- 2.Qc8#
- 1...Bd8
- 2.Rf6#
- 2.Qc8#
- 1...Sf1+
- 2.Qxf1#
- 1...Sf3
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sg6
- 2.Qxf7#
- 1...g4
- 2.Qf4#
- 1...f6
- 2.Qe6#
- 1...Ra1
- Tries
- 1.Sxa5?
- threat
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Sf1+
- 2.Qxf1#
- 1...Be4
- 2.Qxe4#
- 1...Ba2
- 2.Qd3#
- 2.Qc2#
- 2.Qe4#
- 1...Bd3
- 2.Qxd3#
- 2.Qd5#
- 2.Qc5#
- 1...Bb6
- 2.Rd5#
- 2.Rf6#
- 2.Qd5#
- 2.Qc8#
- 1...Sf3
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sg6
- 2.Qxf7#
- 1...Bxd6+!
- threat
- 1.Sc5?
- threat
- 2.Qd5#
- 1...Sf1+
- 2.Qxf1#
- 1...Rxc5
- 2.Qxc5#
- 1...Be4
- 2.Qxe4#
- 1...Ba2
- 2.Qd3#
- 2.Qc2#
- 2.Qe4#
- 1...Sf3
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sg6
- 2.Qxf7#
- 1...Bxd6+!
- threat
- 1.Sd8?
- 1...Sf1+
- 2.Qxf1#
- 1...Bxd8
- 2.Rf6#
- 2.Qc8#
- 1...Be4
- 2.Qxe4#
- 1...Ra6
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra1
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra2
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra3
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra4
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rf6#
- 1...Ra7
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra8
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ba2
- 2.Qd3#
- 2.Qc2#
- 2.Qe4#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Qxd3#
- 1...Bb6
- 2.Rf6#
- 2.Qc8#
- 1...Bb8
- 2.Qc8#
- 1...Sf3
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sg6
- 2.Qxf7#
- 1...g4
- 2.Qf4#
- 1...f6
- 2.Qe6#
- 1...Bxd6+!
- 1...Sf1+
- 1.Re1?
- 1...Bxd6+
- 2.Sxd6#
- 1...Sf1+
- 2.Qxf1#
- 1...Be4
- 2.Qxe4#
- 1...Ra6
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra1
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra2
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra4
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rf6#
- 1...Ra7
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra8
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ba2
- 2.Qd3#
- 2.Qc2#
- 2.Qe4#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Qxd3#
- 1...Bb6
- 2.Rf6#
- 2.Qc8#
- 1...Bb8
- 2.Qc8#
- 1...Bd8
- 2.Rf6#
- 2.Qc8#
- 1...Sf3
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sg6
- 2.Qxf7#
- 1...g4
- 2.Qf4#
- 1...f6
- 2.Qe6#
- 1...Ra3+!
- 1...Bxd6+
- 1.Rf3+?
- 1...Ke5
- 2.Bf6#
- 2.Qd4#
- 1...Sxf3!
- 1...Ke5
- 1.Re5+?
- 1...Rxe5
- 2.Rf6#
- 1...Kxe5!
- 1...Rxe5
- 1.Qf1+?
- 1...Sf3
- 2.Qxb1#
- 2.Qxf3#
- 1...Sxf1+!
- 1...Sf3
- 1.Qd4?
- threat
- 2.Qf6#
- 1...Bxd6+
- 2.Sxd6#
- 1...Re5
- 2.Rxe5#
- 2.Rf6#
- 2.Qxe5#
- 1...Sg4
- 2.Rf3#
- 2.Qxg4#
- 1...f6
- 2.Qxf6#
- 1...Sf1+!
- threat
- 1.Qc6?
- threat
- 2.Qd7#
- 1...Bxd6+
- 2.Sxd6#
- 1...Be4
- 2.Qxe4#
- 1...Re5
- 2.Rf6#
- 1...Ba2
- 2.Qe4#
- 2.Qc2#
- 1...Sf1+!
- threat
- 1.Qxc7?
- threat
- 2.Rf6#
- 2.Qxa5#
- 2.Qd7#
- 2.Qc8#
- 1...Be4
- 2.Rf6#
- 1...Ra6
- 2.Rd5#
- 2.Qc5#
- 2.Qd7#
- 2.Qc8#
- 1...Ra1
- 2.Rd5#
- 2.Rf6#
- 2.Qc5#
- 2.Qd7#
- 2.Qc8#
- 1...Ra2
- 2.Rd5#
- 2.Rf6#
- 2.Qc5#
- 2.Qd7#
- 2.Qc8#
- 1...Ra3
- 2.Rd5#
- 2.Rf6#
- 2.Qc5#
- 2.Qd7#
- 2.Qc8#
- 1...Ra4
- 2.Rd5#
- 2.Rf6#
- 2.Qc5#
- 2.Qd7#
- 2.Qc8#
- 1...Rb5
- 2.Rf6#
- 2.Qd7#
- 2.Qc8#
- 1...Rc5
- 2.Rf6#
- 2.Qxc5#
- 2.Qd7#
- 1...Rd5
- 2.Rxd5#
- 2.Rf6#
- 2.Qd7#
- 2.Qc8#
- 1...Re5
- 2.Rf6#
- 1...Ra7
- 2.Rd5#
- 2.Rf6#
- 2.Qc5#
- 2.Qd7#
- 2.Qc8#
- 1...Ra8
- 2.Rd5#
- 2.Rf6#
- 2.Qc5#
- 2.Qd7#
- 1...Ba2
- 2.Rf6#
- 2.Qc2#
- 1...Bd3
- 2.Rf6#
- 2.Qd7#
- 2.Qc8#
- 1...Sf3
- 2.Rf6#
- 2.Qd7#
- 2.Qc8#
- 1...Sg4
- 2.Qd7#
- 2.Qc8#
- 1...Sg6
- 2.Rf6#
- 2.Qd7#
- 2.Qc8#
- 1...g4
- 2.Qxa5#
- 2.Qd7#
- 2.Qc8#
- 1...f6
- 2.Rxf6#
- 2.Qxa5#
- 2.Qd7#
- 2.Qc8#
- 1...Sf1+!
- threat
- 1.Sxa5?
- Keys
- 1.Bd8!
- 1...Bxd6+
- 2.Sxd6#
- 1...Sf1+
- 2.Qxf1#
- 1...Bxd8
- 2.Qc8#
- 1...Be4
- 2.Qxe4#
- 1...Ra6
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra1
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra2
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra3
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra4
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rf6#
- 1...Ra7
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ra8
- 2.Qb5#
- 2.Qd5#
- 2.Qc5#
- 1...Ba2
- 2.Qd3#
- 2.Qc2#
- 2.Qe4#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Qxd3#
- 1...Bb6
- 2.Rf6#
- 2.Qc8#
- 1...Bb8
- 2.Qc8#
- 1...Sf3
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Sg6
- 2.Qxf7#
- 1...g4
- 2.Qf4#
- 1...f6
- 2.Qe6#
- 1...Bxd6+
- 1.Bd8!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::QAR(C),XR(c)
- R(c);N_GUARD::QAR2(C),XR(c)
- R(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::QAB(C),XB(a)
- B(a);N_GUARD::QAB1(C),XB(a)
- B(f);CHECK,XR(E)::S(F),XB(f)
- B(f);OGATE::QAB(C)
- S(b);CHECK,N_GUARD::QAR(C),XS(b)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(h);N_GUARD::QAR2(C),XP(g)
- P(e);N_GUARD::QAR1(C)
- P(g);N_GUARD::QAB1(C)
- Tries
- Try
- S(F);XR(c)
- Threat
- DUALS(3)
- Vars
- S(b);CHECK,N_GUARD::QAR(C),XS(b)
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(h);N_GUARD::QAR2(C),XP(g)
- Refutation
- B(f);CHECK,XR(E)
- Try
- S(F);
- Threat
- QAR2(C)
- Vars
- S(b);CHECK,N_GUARD::QAR(C),XS(b)
- R(c);OGATE,XS(F)::QAR(C),XR(c)
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(h);N_GUARD::QAR2(C),XP(g)
- Refutation
- B(f);CHECK,XR(E)
- Try
- S(F);
- Vars
- S(b);CHECK,N_GUARD::QAR(C),XS(b)
- B(a);N_GUARD::QAB1(C),XB(a)
- R(c);N_GUARD::QAR(C),XR(c)
- R(c);N_GUARD::QAR2(C),XR(c)
- R(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::QAB(C),XB(a)
- B(f);OGATE::QAB(C)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(h);N_GUARD::QAR2(C),XP(g)
- P(e);N_GUARD::QAR1(C)
- P(g);N_GUARD::QAB1(C)
- Refutation
- B(f);CHECK,XR(E)
- Try
- R(A);
- Vars
- B(f);CHECK,XR(E)::S(F),XB(f)
- S(b);CHECK,N_GUARD::QAR(C),XS(b)
- B(a);N_GUARD::QAB1(C),XB(a)
- R(c);N_GUARD::QAR(C),XR(c)
- R(c);N_GUARD::QAR2(C),XR(c)
- R(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::QAB(C),XB(a)
- B(f);OGATE::QAB(C)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(h);N_GUARD::QAR2(C),XP(g)
- P(e);N_GUARD::QAR1(C)
- P(g);N_GUARD::QAB1(C)
- Refutation
- R(c);CHECK
- Try
- R(A);CHECK
- Refutation
- S(b);XR(A)
- Try
- R(A);CHECK,N_SPINR(E)
- Vars
- R(c);SBLOCK,XR(A)::R1(E)
- Refutation
- K(d);P-FLIGHT,XR(A)
- Try
- Q(C);CHECK
- Refutation
- S(b);CHECK,XQ(C)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- B(f);CHECK,XR(E)::S(F),XB(f)
- P(g);::QAR1(C),XP(g)
- Refutation
- S(b);CHECK
- Try
- Q(C);
- Threat
- QAB(C)
- Vars
- B(f);CHECK,XR(E)::S(F),XB(f)
- B(a);N_GUARD::QAB1(C),XB(a)
- R(c);N_PINR(E)::R1(E)
- Refutation
- S(b);CHECK
- Try
- Q(C);N_SPINR(E),XB(f)
- Threat
- DUALS(4)
- Vars
- B(a);::R1(E)
- R(c);::R1(E)
- Refutation
- S(b);CHECK
- Try
- Actual
- B(G);
- Vars
- B(f);CHECK,XR(E)::S(F),XB(f)
- S(b);CHECK,N_GUARD::QAR(C),XS(b)
- B(f);N_PINR(E),OGATE,XB(G)::QAB(C)
- B(a);N_GUARD::QAB1(C),XB(a)
- R(c);N_GUARD::QAR(C),XR(c)
- R(c);N_GUARD::QAR2(C),XR(c)
- R(c);N_PINR(E)::R1(E)
- B(a);N_GUARD::QAB(C),XB(a)
- B(f);OGATE::QAB(C)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(h);N_GUARD::QAR2(C),XP(g)
- P(e);N_GUARD::QAR1(C)
- P(g);N_GUARD::QAB1(C)
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).