MESON Chess Problem Database
Problem Display
PID: 275462 (K7/1p3p2/b4r2/P1k5/PN1RQBn1/P3n1N1/4B1q1/1r4b1 w - - 0 1)
Andrade, Barry Jack da Costa
British Chess Magazine, 1935
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxb4
- 2.axb4#
- 1...Rf5
- 2.Bd6#
- 1...Rd6
- 2.Bxd6#
- 1...Bd3
- 2.Sxd3#
- 1...Sd1
- 2.Rd5#
- 1...Sf1
- 2.Rd5#
- 1...Sc2
- 2.Rd5#
- 1...Sc4
- 2.Sd3#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sf5
- 2.Rd5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sxa6#
- 1...Rxb4
- Tries
- 1.Bxe3?
- threat
- 2.Rd5#
- 1...Rxb4
- 2.axb4#
- 1...Sxe3!
- threat
- 1.Rc4+?
- 1...Sxc4
- 2.Sd3#
- 1...Bxc4!
- 1...Sxc4
- 1.Rd7?
- threat
- 2.Qd4#
- 1...Qxe4
- 2.Sxe4#
- 1...Rxb4
- 2.axb4#
- 1...Rxf4
- 2.Qe7#
- 1...Rd6
- 2.Bxd6#
- 1...Sd1
- 2.Rd5#
- 1...Sf1
- 2.Rd5#
- 1...Sc2
- 2.Rd5#
- 1...Sc4
- 2.Sd3#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sf5
- 2.Rd5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sxa6#
- 1...Rd1!
- threat
- 1.Rd8?
- threat
- 2.Qd4#
- 1...Qxe4
- 2.Sxe4#
- 1...Rxb4
- 2.axb4#
- 1...Rxf4
- 2.Qe7#
- 1...Rd6
- 2.Bxd6#
- 1...Sd1
- 2.Rd5#
- 1...Sf1
- 2.Rd5#
- 1...Sc2
- 2.Rd5#
- 1...Sc4
- 2.Sd3#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sf5
- 2.Rd5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sxa6#
- 1...Rd1!
- threat
- 1.Qe7+?
- 1...Rd6
- 2.Qxd6#
- 1...Kxd4!
- 1...Rd6
- 1.Bxe3?
- Keys
- 1.Rd2!
- threat
- 2.Qd4#
- 1...Qxe4
- 2.Sxe4#
- 1...Rxb4
- 2.axb4#
- 1...Rxf4
- 2.Qe7#
- 1...Rd6
- 2.Bxd6#
- 1...Bd3
- 2.Sxd3#
- 1...Sd1
- 2.Rd5#
- 1...Sf1
- 2.Rd5#
- 1...Sc2
- 2.Rd5#
- 1...Sc4
- 2.Sd3#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sf5
- 2.Rd5#
- 1...b5
- 2.Sd3#
- 1...b6
- 2.Sxa6#
- threat
- 1.Rd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(a);OGATE,XS(E)::P(B),XR(a)
- R(h);N_GUARD::B(H)
- R(h);N_GUARD::B(H),XR(h)
- B(g);N_GUARD::S(E),XB(g)
- S(d);N_GUARD::R1(F)
- S(d);N_GUARD::R1(F),XS(d)
- P(i);P_PINQ(G),S_CUTB(g)::S(E)
- P(i);N_GUARD,P_PINQ(G),S_CUTR(h)::S(E),XB(g)
- Tries
- Try
- B(H);XS(d)
- Threat
- B(H)+R(F),DCHECK
- Vars
- R(a);OGATE,XS(E)::P(B),XR(a)
- Refutation
- S(e);XB(H)
- Try
- R(F);CHECK
- Vars
- S(d);XR(F)::S(E)
- Refutation
- B(g);XR(F)
- Try
- R(F);
- Threat
- QAB1(G)
- Vars
- Q(c);XQ(G)::S(C),XQ(c)
- R(a);OGATE,XS(E)::P(B),XR(a)
- R(h);N_GUARD,XB(H)::QAB(G)
- R(h);N_GUARD::B(H),XR(h)
- S(d);N_GUARD::R1(F)
- S(d);N_GUARD::R1(F),XS(d)
- P(i);P_PINQ(G),S_CUTB(g)::S(E)
- P(i);N_GUARD,P_PINQ(G),S_CUTR(h)::S(E),XB(g)
- Refutation
- R(a);
- Try
- R(F);
- Threat
- QAB1(G)
- Vars
- Q(c);XQ(G)::S(C),XQ(c)
- R(a);OGATE,XS(E)::P(B),XR(a)
- R(h);N_GUARD,XB(H)::QAB(G)
- R(h);N_GUARD::B(H),XR(h)
- S(d);N_GUARD::R1(F)
- S(d);N_GUARD::R1(F),XS(d)
- P(i);P_PINQ(G),S_CUTB(g)::S(E)
- P(i);N_GUARD,P_PINQ(G),S_CUTR(h)::S(E),XB(g)
- Refutation
- R(a);
- Try
- Q(G);CHECK
- Vars
- R(h);N_GUARD,P_SPINR(h)::QAB1(G),XR(h)
- Refutation
- K(f);S_FLIGHT,XR(F)
- Try
- Actual
- R(F);
- Threat
- QAB1(G)
- Vars
- Q(c);XQ(G)::S(C),XQ(c)
- R(a);OGATE,XS(E)::P(B),XR(a)
- R(h);N_GUARD,XB(H)::QAB(G)
- R(h);N_GUARD::B(H),XR(h)
- B(g);N_GUARD::S(E),XB(g)
- S(d);N_GUARD::R1(F)
- S(d);N_GUARD::R1(F),XS(d)
- P(i);P_PINQ(G),S_CUTB(g)::S(E)
- P(i);N_GUARD,P_PINQ(G),S_CUTR(h)::S(E),XB(g)
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).