MESON Chess Problem Database
Problem Display
PID: 157884 (3Nb3/qR4n1/p2B4/3B2R1/1p1k2pr/r2P4/nKPN1PP1/8 w - - 0 1)
Armeni, Alberto
Best Problems, 2009
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Rb3+
- 2.Sxb3#
- 1...Ra4
- 2.Sb3#
- 1...Ra5
- 2.Sb3#
- 1...Bh5
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Sc1
- 2.Rxb4#
- 1...Sc3
- 2.Rxb4#
- 1...Sh5
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...g3
- 2.Sf3#
- 1...Rb3+
- Tries
- 1.Bxa2?
- threat
- 2.Rd5#
- 2.Rxb4#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Qc5
- 2.Bxc5#
- 1...Qb6
- 2.Rd5#
- 1...Qb8
- 2.Bc5#
- 2.Rd5#
- 1...Rc3
- 2.Rd5#
- 1...Ra4
- 2.Sb3#
- 2.Rd5#
- 1...Ra5
- 2.Sb3#
- 2.Rxb4#
- 1...Rh5
- 2.Rxg4#
- 2.Rxb4#
- 1...Bb5
- 2.Rd5#
- 1...Bc6
- 2.Sxc6#
- 2.Rxb4#
- 1...Bf7
- 2.Sc6#
- 1...Sf5
- 2.Se6#
- 2.Rxb4#
- 1...b3
- 2.Rb4#
- 1...a5
- 2.Rd5#
- 1...Rxa2+!
- threat
- 1.Bb3?
- threat
- 2.Rd5#
- 1...Rxb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Qc5
- 2.Bxc5#
- 1...Rh5
- 2.Rxg4#
- 1...Bc6
- 2.Sxc6#
- 1...Bf7
- 2.Sc6#
- 1...Sc3
- 2.Rxb4#
- 1...Sf5
- 2.Se6#
- 1...Ra5!
- threat
- 1.Bc4?
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Rh5
- 2.Rxg4#
- 1...Bc6
- 2.Sxc6#
- 1...Bf7
- 2.Sc6#
- 1...Sf5
- 2.Se6#
- 1...Sc3!
- threat
- 1.Be4?
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Bc6
- 2.Sxc6#
- 1...Bf7
- 2.Sc6#
- 1...Sc3
- 2.Rxb4#
- 1...Sf5
- 2.Se6#
- 1...Rh5!
- threat
- 1.Bc6?
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Bxc6
- 2.Sxc6#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Rh5
- 2.Rxg4#
- 1...Sc3
- 2.Rxb4#
- 1...Sf5
- 2.Se6#
- 1...Bf7!
- threat
- 1.Be6?
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Sxe6
- 2.Sxe6#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Rh5
- 2.Rxg4#
- 1...Bc6
- 2.Sxc6#
- 1...Sc3
- 2.Rxb4#
- 1...Sf5!
- threat
- 1.Bf7?
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Bxf7
- 2.Sc6#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Rh5
- 2.Rxg4#
- 1...Bc6
- 2.Sxc6#
- 1...Sc3
- 2.Rxb4#
- 1...Se6
- 2.Sxe6#
- 1...Sf5!
- threat
- 1.Bg8?
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Rh5
- 2.Rxg4#
- 1...Bc6
- 2.Sxc6#
- 1...Bf7
- 2.Sc6#
- 1...Sc3
- 2.Rxb4#
- 1...Se6
- 2.Sxe6#
- 1...Sf5!
- threat
- 1.Bxa2?
- Keys
- 1.Bf3!
- threat
- 2.Rd5#
- 1...Rb3+
- 2.Sxb3#
- 1...Qxb7
- 2.Bc5#
- 1...gxf3
- 2.Sxf3#
- 1...Qc5
- 2.Bxc5#
- 1...Ra5
- 2.Sb3#
- 1...Rh5
- 2.Rxg4#
- 1...Bc6
- 2.Sxc6#
- 1...Bf7
- 2.Sc6#
- 1...Sc3
- 2.Rxb4#
- 1...Sf5
- 2.Se6#
- threat
- 1.Bf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 7
- Sets
- R(b);CHECK,N_GUARD::S(C),XR(b)
- R(b);N_GUARD::S(C)
- B(j);N_GUARD::S(K)
- B(j);N_GUARD::S(K),XB(j)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K)
- S(i);N_GUARD::S(K),XS(i)
- P(e);N_GUARD::S(C)
- Tries
- Try
- B(G);XS(a)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- Q(h);N_GUARD::B(I),XQ(h)
- Q(h);::R1(H)
- R(b);::R1(H)
- B(j);::R1(H)
- B(j);N_GUARD::S(K)
- P(c);::R(J)
- P(g);::R1(H)
- Refutation
- R(b);CHECK,XB(G)
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,XB(G)::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- Q(h);N_GUARD::B(I),XQ(h)
- R(f);N_GUARD::R(H),XP(e)
- B(j);N_GUARD::S(K),XB(j)
- B(j);N_GUARD::S(K)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K)
- Refutation
- R(b);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- R(f);N_GUARD::R(H),XP(e)
- B(j);N_GUARD::S(K),XB(j)
- B(j);N_GUARD::S(K)
- S(i);N_GUARD::S(K)
- Refutation
- S(a);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- B(j);N_GUARD::S(K),XB(j)
- B(j);N_GUARD::S(K)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K)
- Refutation
- R(f);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- B(j);XB(G)::S(K),XB(j)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- R(f);N_GUARD::R(H),XP(e)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K)
- Refutation
- B(j);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- S(i);XB(G)::S(K),XS(i)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- R(f);N_GUARD::R(H),XP(e)
- B(j);N_GUARD::S(K),XB(j)
- S(a);N_GUARD::R(J),XP(c)
- Refutation
- S(i);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- B(j);N_GUARD,XB(G)::S(K)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- R(f);N_GUARD::R(H),XP(e)
- B(j);N_GUARD::S(K),XB(j)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K),XS(i)
- Refutation
- S(i);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- R(f);N_GUARD::R(H),XP(e)
- B(j);N_GUARD::S(K),XB(j)
- B(j);N_GUARD::S(K)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K),XS(i)
- Refutation
- S(i);
- Try
- Actual
- B(G);
- Threat
- R1(H)
- Vars
- R(b);CHECK,N_GUARD::S(C),XR(b)
- Q(h);N_GUARD,XR(J)::B(I)
- P(e);XB(G)::S(C),XP(e)
- Q(h);N_GUARD::B(I),XQ(h)
- R(b);N_GUARD::S(C)
- R(f);N_GUARD::R(H),XP(e)
- B(j);N_GUARD::S(K),XB(j)
- B(j);N_GUARD::S(K)
- S(a);N_GUARD::R(J),XP(c)
- S(i);N_GUARD::S(K)
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).