MESON Chess Problem Database
Problem Display
PID: 71048 (1b6/R1pbp3/r7/2R4B/n2k3N/B2NpP2/2P3Qp/7K w - - 0 1)
Coello Alonso, Jose Antonio
4th Comm., Problemas, 1990
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rc6
- 2.Rxa4#
- 1...Re6
- 2.Sf5#
- 1...Bg4
- 2.Qxg4#
- 1...Bb5
- 2.Sf5#
- 2.Qg4#
- 1...Bf5
- 2.Sxf5#
- 1...Bc6
- 2.Sf5#
- 1...Be6
- 2.Qg7#
- 1...Be8
- 2.Sf5#
- 2.Qg4#
- 1...Sb2
- 2.Bxb2#
- 1...Sb6
- 2.Bb2#
- 1...e2
- 2.Qf2#
- 1...e6
- 2.Qg4#
- 1...Rc6
- Tries
- 1.Sc1?
- threat
- 2.Se2#
- 2.Sb3#
- 1...e2
- 2.Qf2#
- 1...Rb6
- 2.Se2#
- 1...Bb5
- 2.Sb3#
- 2.Sf5#
- 2.Qg4#
- 1...Be6
- 2.Se2#
- 2.Qg7#
- 1...Sc3
- 2.Sb3#
- 1...Sxc5!
- threat
- 1.Bb2+?
- 1...Sc3
- 2.Bxc3#
- 1...Sxb2!
- 1...Sc3
- 1.Qg5?
- threat
- 2.Qf4#
- 2.Qd5#
- 2.Qe5#
- 1...Sxc5
- 2.Qxc5#
- 1...Rd6
- 2.Qf4#
- 2.Qe5#
- 1...Re6
- 2.Sf5#
- 2.Qd5#
- 1...Rf6
- 2.Qd5#
- 2.Qe5#
- 1...Bf5
- 2.Sxf5#
- 1...Bc6
- 2.Sf5#
- 2.Qe5#
- 1...Be6
- 2.Qf4#
- 2.Qe5#
- 2.Qg7#
- 1...Sc3
- 2.Qe5#
- 1...Sb6
- 2.Bb2#
- 2.Qf4#
- 2.Qe5#
- 1...e2
- 2.Qf4#
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 1...e6
- 2.Qf4#
- 2.Qg4#
- 2.Qe5#
- 1...c6!
- threat
- 1.Qg7+?
- 1...e5
- 2.Qxe5#
- 1...Rf6!
- 1...e5
- 1.Qg8?
- threat
- 2.Rc4#
- 2.Qc4#
- 2.Qd5#
- 1...Sxc5
- 2.Bb2#
- 1...c6
- 2.Rc4#
- 2.Qc4#
- 1...Rc6
- 2.Rxa4#
- 2.Qc4#
- 2.Qd5#
- 1...Rd6
- 2.Rc4#
- 2.Qc4#
- 1...Re6
- 2.Sf5#
- 1...Bb5
- 2.Sf5#
- 2.Qd5#
- 2.Qg4#
- 1...Bc6
- 2.Sf5#
- 2.Rc4#
- 2.Qc4#
- 1...Be6
- 2.Qg7#
- 2.Qh8#
- 1...Sb2
- 2.Bxb2#
- 2.Qd5#
- 1...Sc3
- 2.Rc4#
- 2.Qc4#
- 1...Sb6
- 2.Bb2#
- 1...e6
- 2.Qg4#
- 1...e2!
- threat
- 1.Sc1?
- Keys
- 1.Bf7!
- threat
- 2.Rc4#
- 1...Sxc5
- 2.Bb2#
- 1...e2
- 2.Qf2#
- 1...Rc6
- 2.Rxa4#
- 1...Re6
- 2.Sf5#
- 1...Bb5
- 2.Sf5#
- 2.Qg4#
- 1...Be6
- 2.Qg7#
- 1...Sb2
- 2.Bxb2#
- 1...Sb6
- 2.Bb2#
- 1...e6
- 2.Qg4#
- threat
- 1.Bf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(e);OGATE::R(J),XS(c)
- R(e);S_CUTB(g)::S(G)
- B(g);N_GUARD::QAR(C),XB(g)
- B(g);N_GUARD::S(G),XB(g)
- B(g);N_GUARD::S(G)
- B(g);S_CUTP(h),S_CUTR(e)::QAB(C)
- S(c);N_GUARD::B(D),XS(c)
- S(c);N_GUARD::B(D)
- P(b);OGATEB::QAB(C)
- P(h);S_CUTB(g)::QAR(C)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- P(b);OGATEB::QAB(C)
- R(e);::S(E)
- S(c);::S(E)
- Refutation
- S(c);XR(H)
- Try
- B(D);CHECK
- Vars
- S(c);N_GUARD,P_SPINS(c)::B(D),XS(c)
- Refutation
- S(c);XB(D)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- S(c);OGATE,XR(H)::QAB1(C),XS(c)
- B(g);N_GUARD::S(G),XB(g)
- S(c);::QAB1(C)
- P(h);::QAB1(C),XP(h)
- Refutation
- P(f);
- Try
- Q(C);CHECK
- Vars
- P(h);P_SPINP(h)::QAB1(C),XP(h)
- Refutation
- R(e);P_SPINR(e)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- S(c);N_GUARD,XR(H)::B(D)
- R(e);S_CUTB(g)::S(G)
- S(c);N_GUARD::B(D)
- P(h);S_CUTB(g)::QAR(C)
- Refutation
- P(b);
- Try
- Actual
- B(I);
- Threat
- R1(H)
- Vars
- S(c);N_GUARD,XR(H)::B(D)
- P(b);OGATEB::QAB(C)
- R(e);OGATE::R(J),XS(c)
- R(e);S_CUTB(g)::S(G)
- B(g);S_CUTP(h),S_CUTR(e)::QAB(C)
- S(c);N_GUARD::B(D),XS(c)
- S(c);N_GUARD::B(D)
- P(h);S_CUTB(g)::QAR(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).