MESON Chess Problem Database
Problem Display
PID: 63129 (1n5K/P3N1B1/R7/R1p2Q2/1k4rp/1P1p3r/7q/2N3bb w - - 0 1)
Andrade, Barry Jack da Costa
Chess, 1944
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Re3
- 2.Qxc5#
- 1...Rf3
- 2.Sd5#
- 1...Rg2
- 2.Sd5#
- 1...Rd4
- 2.Qxc5#
- 1...Re4
- 2.Sd5#
- 1...Bd5
- 2.Sxd5#
- 1...c4
- 2.Ra4#
- 2.Rb5#
- 2.Qb5#
- 1...Re3
- Tries
- 1.Qxd3?
- threat
- 2.Bc3#
- 2.Ra4#
- 2.Rb5#
- 2.Qb5#
- 1...Rxg7
- 2.Ra4#
- 2.Rb5#
- 2.Qc4#
- 1...Sxa6
- 2.Bc3#
- 2.Ra4#
- 2.Qb5#
- 1...Qe5
- 2.Sa2#
- 2.Ra4#
- 2.Rb5#
- 1...Qa2
- 2.Sxa2#
- 2.Bc3#
- 2.Rb5#
- 2.Qb5#
- 1...Qb2
- 2.Ra4#
- 2.Rb5#
- 2.Qb5#
- 1...Qc2
- 2.Ra4#
- 2.Rb5#
- 2.Qb5#
- 1...Qd2
- 2.Ra4#
- 2.Rb5#
- 2.Qb5#
- 1...Qe2
- 2.Bc3#
- 2.Ra4#
- 2.Rb5#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Ra4#
- 2.Rb5#
- 1...Bd4
- 2.Ra4#
- 2.Rb5#
- 2.Qc4#
- 1...Bc6
- 2.Bc3#
- 1...c4
- 2.Bc3#
- 1...Rxd3!
- threat
- 1.Qe4+?
- 1...Rxe4
- 2.Sd5#
- 1...Bd4
- 2.Sd5#
- 1...c4
- 2.Sd5#
- 1...Bxe4!
- 1...Rxe4
- 1.axb8Q+?
- 1...Bb7
- 2.Sd5#
- 2.Sc6#
- 2.Qxb7#
- 1...Qxb8+!
- 1...Bb7
- 1.axb8R+?
- 1...Bb7
- 2.Sd5#
- 2.Sc6#
- 2.Rxb7#
- 1...Qxb8+!
- 1...Bb7
- 1.Qxd3?
- Keys
- 1.Qd5!
- 1...Rxg7
- 2.Qc4#
- 1...Bxd5
- 2.Sxd5#
- 1...Sxa6
- 2.Sc6#
- 1...Qe5
- 2.Sa2#
- 1...Rd4
- 2.Qxc5#
- 1...Bd4
- 2.Qc4#
- 1...Qg3
- 2.Sa2#
- 1...Qf4
- 2.Sa2#
- 1...Qd6
- 2.Sa2#
- 1...Qc7
- 2.Sa2#
- 1...Qa2
- 2.Sxa2#
- 2.axb8Q#
- 2.axb8R#
- 1...Qb2
- 2.axb8Q#
- 2.axb8R#
- 1...Qc2
- 2.axb8Q#
- 2.axb8R#
- 1...Qd2
- 2.axb8Q#
- 2.axb8R#
- 1...Qe2
- 2.axb8Q#
- 2.axb8R#
- 1...Qf2
- 2.axb8Q#
- 2.axb8R#
- 1...Qg2
- 2.axb8Q#
- 2.axb8R#
- 1...Re3
- 2.Qxc5#
- 1...Rf3
- 2.Qb7#
- 1...Rhg3
- 2.axb8Q#
- 2.axb8R#
- 1...Rg2
- 2.Qc4#
- 2.Qb7#
- 1...Rgg3
- 2.Qc4#
- 2.axb8Q#
- 2.axb8R#
- 1...Rc4
- 2.Qxc4#
- 1...Re4
- 2.Qb7#
- 1...Rf4
- 2.axb8Q#
- 2.axb8R#
- 1...Rg5
- 2.Qc4#
- 1...Rg6
- 2.Qc4#
- 1...Bf2
- 2.Sa2#
- 1...Be3
- 2.Sxd3#
- 1...Bg2
- 2.Sa2#
- 1...Bf3
- 2.Sxd3#
- 1...Be4
- 2.Qc4#
- 1...Sc6
- 2.Sxc6#
- 1...Sd7
- 2.Sc6#
- 1...d2
- 2.Sa2#
- 1...c4
- 2.Ra4#
- 2.Rb5#
- 2.Qb5#
- 1...Rxg7
- 1.Qd5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 19
- REMOVED MATES = 1
- Sets
- R(e);S_CUTB(a)::QAB1(D),XP(i)
- R(e);S_CUTB(b)::S(G)
- R(g);S_CUTB(b)::S(G)
- R(g);S_CUTB(a)::QAB1(D),XP(i)
- B(b);N_GUARD::S(G),XB(b)
- Tries
- Try
- Q(D);XP(d)
- Threat
- DUALS(4)
- Vars
- R(g);N_GUARD::QAR1(D),XR(g)
- B(b);::B(H)
- P(i);::B(H)
- Refutation
- R(e);XQ(D)
- Try
- Q(D);CHECK
- Vars
- R(g);XQ(D)::S(G)
- B(a);P_PINB(H),P_SPINB(a)::S(G)
- P(i);P_SPINP(i)::S(G)
- Refutation
- B(b);XQ(D)
- Try
- P(F);CHECK,XS(j)
- Refutation
- Q(c);CHECK,XQ(F)
- Try
- P(F);CHECK,XS(j)
- Refutation
- Q(c);CHECK,XR(F)
- Try
- Actual
- Q(D);
- Vars
- R(g);N_GUARD,XB(H)::QAR1(D)
- B(b);XQ(D)::S(G),XB(b)
- S(j);N_GUARD,XR(E)::S(G)
- Q(c);N_GUARD,P_PINB(H)::S(A)
- R(g);S_CUTB(a)::QAB1(D),XP(i)
- B(a);P_PINB(H),S_CUTR(g)::QAR1(D)
- Q(c);N_GUARD::S(A)
- Q(c);N_GUARD,P_PINB(H)::PXS(j)=Q
- Q(c);N_GUARD::PXS(j)=Q
- R(e);S_CUTB(a)::QAB1(D),XP(i)
- R(e);S_CUTB(b)::QAR(D)
- R(e);S_CUTQ(c)::PXS(j)=Q
- R(g);N_GUARD::QAR1(D),XR(g)
- R(g);S_CUTB(b)::QAR(D)
- R(g);S_CUTQ(c)::PXS(j)=Q
- R(g);N_GUARD::QAR1(D)
- B(a);S_CUTQ(c)::S(A)
- B(a);S_CUTR(e)::S(A),XP(d)
- B(b);S_CUTQ(c)::S(A)
- B(b);S_CUTR(e)::S(A),XP(d)
- B(b);S_CUTR(g)::QAR1(D)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(d);S_CUTQ(c)::S(A)
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).