MESON Chess Problem Database
Problem Display
PID: 80681 (5K2/p2N1B2/nn6/1Q2p3/1B1k4/4r3/5N2/8 w - - 0 1)
Andrade, Barry Jack da Costa
The Field, 1948
(First published on Sat Jun 19 1948)
#2
6 + 6
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sxb4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sxd7+
- 2.Qxd7#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Re1
- Tries
- 1.Ke7?
- 1...Sd5+
- 2.Qxd5#
- 1...Sxb4
- 2.Qc5#
- 1...Sxd7
- 2.Qc4#
- 2.Qxd7#
- 2.Qd5#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Sc8+!
- 1...Sd5+
- 1.Kg7?
- 1...Sxb4
- 2.Qc5#
- 1...Sxd7
- 2.Qc4#
- 2.Qxd7#
- 2.Qd5#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Rg3+!
- 1...Sxb4
- 1.Ke8?
- 1...Sxb4
- 2.Qc5#
- 1...Sxd7
- 2.Qc4#
- 2.Qxd7#
- 2.Qd5#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sc5
- 2.Qxc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Sc7+!
- 1...Sxb4
- 1.Kg8?
- 1...Sxb4
- 2.Qc5#
- 1...Sxd7
- 2.Qc4#
- 2.Qxd7#
- 2.Qd5#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Rg3+!
- 1...Sxb4
- 1.Be1?
- 1...Rxe1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sb4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Sxd7+!
- 1...Rxe1
- 1.Bd2?
- 1...Re1
- 2.Qd3#
- 2.Qb2#
- 1...Re2
- 2.Qd3#
- 2.Qb2#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 2.Qb2#
- 1...Sb4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Sxd7+!
- 1...Re1
- 1.Bc3+?
- 1...Rxc3
- 2.Qxe5#
- 1...Kxc3!
- 1...Rxc3
- 1.Ba5?
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rf3
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sb4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Sxd7+!
- 1...Re1
- 1.Bc5+?
- 1...Sxc5
- 2.Qxc5#
- 1...Kc3!
- 1...Sxc5
- 1.Be6?
- 1...Sxd7+
- 2.Qxd7#
- 1...Sxb4
- 2.Qc5#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Rf3+!
- 1...Sxd7+
- 1.Bg8?
- 1...Sxd7+
- 2.Qxd7#
- 1...Sxb4
- 2.Qc5#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Ra3
- 2.Qxe5#
- 1...Rb3
- 2.Qxe5#
- 1...Rc3
- 2.Qxe5#
- 1...Rd3
- 2.Qxd3#
- 2.Qxe5#
- 1...Rg3
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Qd3#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qc4#
- 2.Qd5#
- 1...Sc4
- 2.Qxc4#
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qc4#
- 2.Qd5#
- 1...Sc8
- 2.Qc4#
- 2.Qd5#
- 1...e4
- 2.Qe5#
- 1...Rf3+!
- 1...Sxd7+
- 1.Qxb6+?
- 1...Sc5
- 2.Qxc5#
- 2.Qd6#
- 1...axb6!
- 1...Sc5
- 1.Ke7?
- Keys
- 1.Qc6!
- 1...Sxd7+
- 2.Qxd7#
- 1...Sxb4
- 2.Qc5#
- 1...Re1
- 2.Qc3#
- 1...Re2
- 2.Qc3#
- 1...Ra3
- 2.Qe4#
- 1...Rb3
- 2.Qe4#
- 1...Rc3
- 2.Qe4#
- 2.Qxc3#
- 1...Rd3
- 2.Qe4#
- 1...Rf3
- 2.Qe4#
- 1...Rg3
- 2.Qe4#
- 1...Rh3
- 2.Qe4#
- 1...Re4
- 2.Qxe4#
- 2.Qc3#
- 1...Sc5
- 2.Qxc5#
- 1...Sc7
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sa4
- 2.Qd5#
- 2.Qc4#
- 2.Qd6#
- 1...Sc4
- 2.Qd5#
- 2.Qxc4#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 2.Qc4#
- 2.Qd6#
- 1...Sc8
- 2.Qd5#
- 2.Qc4#
- 1...e4
- 2.Qf6#
- 1...Sxd7+
- 1.Qc6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- R(a);N_GUARD,P_PINB(E)::QAB1(C),XP(c)
- S(d);N_GUARD,XB(B)::QAB1(C)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- S(e);CHECK,OGATE,XS(D)::QAR(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Tries
- Try
- K(F);S_FLIGHT
- Vars
- S(e);CHECK,N_GUARD::QAR1(C),XS(e)
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- S(e);CHECK
- Try
- K(F);S_FLIGHT
- Vars
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- R(a);CHECK
- Try
- K(F);P-FLIGHT
- Vars
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- S(d);CHECK
- Try
- K(F);P-FLIGHT
- Vars
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- R(a);CHECK
- Try
- B(B);
- Vars
- R(a);N_GUARD,XB(B)::QAR1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- R(a);N_GUARD,P_PINB(E)::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- S(e);CHECK,XS(D)
- Try
- B(B);
- Vars
- R(a);N_GUARD::QAB1(C),XP(c)
- R(a);N_GUARD,P_PINB(E)::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- S(e);CHECK,XS(D)
- Try
- B(B);CHECK
- Vars
- R(a);SBLOCK,XB(B)::QAB1(C),XP(c)
- Refutation
- K(b);S_FLIGHT,XB(B)
- Try
- B(B);
- Vars
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- R(a);N_GUARD,P_PINB(E)::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- S(e);CHECK,XS(D)
- Try
- B(B);CHECK
- Vars
- S(d);OGATE,XB(B)::QAB1(C),XS(d)
- Refutation
- K(b);S_FLIGHT
- Try
- B(E);
- Vars
- S(e);CHECK,OGATE,XS(D)::QAR(C),XS(e)
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- R(a);CHECK
- Try
- B(E);
- Vars
- S(e);CHECK,OGATE,XS(D)::QAR(C),XS(e)
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD::QAB1(C),XP(c)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);S_CUTR(a)::QAB1(C)
- Refutation
- R(a);CHECK
- Try
- Q(C);CHECK,XS(e)
- Refutation
- P(f);XQ(C)
- Try
- Actual
- Q(C);
- Vars
- S(e);CHECK,OGATE,XS(D)::QAR(C),XS(e)
- S(d);N_GUARD,XB(B)::QAB1(C)
- R(a);N_GUARD::QAB1(C)
- R(a);N_GUARD::QAR1(C)
- R(a);N_GUARD,P_PINB(E)::QAR1(C)
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD::QAB1(C)
- S(e);N_GUARD::QAR1(C),XS(e)
- P(c);OGATEB::QAB(C)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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