MESON Chess Problem Database
Problem Display
PID: 54669 (br6/2N1Ppp1/p2P4/P2P1N2/pRBBkPK1/3p2p1/2p4b/1rR5 w - - 0 1)
Mansfield, Comins
Stella Polaris, 1971
#2
12 + 12
| 4054 | Complete Mansfield/III | 1999 |
SOLUTION
- SOUND
- Sets
- 1...Rb2
- 2.Re1#
- 1...Rb3
- 2.Re1#
- 1...R1xb4
- 2.Re1#
- 1...R8xb4
- 2.e8Q#
- 2.e8R#
- 1...Rb5
- 2.e8Q#
- 2.e8R#
- 1...Rb6
- 2.e8Q#
- 2.e8R#
- 1...Rb7
- 2.e8Q#
- 2.e8R#
- 1...Bxd5
- 2.Bxd5#
- 1...Rb2
- Tries
- 1.Sb5?
- threat
- 2.Sc3#
- 1...Rxb5
- 2.e8Q#
- 2.e8R#
- 1...Rb3
- 2.Re1#
- 1...axb5!
- threat
- 1.Sxa6?
- threat
- 2.Sc5#
- 1...Rb5
- 2.e8Q#
- 2.e8R#
- 1...Rc8!
- threat
- 1.Se6?
- threat
- 2.Sc5#
- 2.Sg5#
- 1...Rb5
- 2.Sg5#
- 1...Rc8
- 2.Sg5#
- 1...f6
- 2.Sc5#
- 1...g5
- 2.Sc5#
- 2.Sxg5#
- 1...fxe6!
- threat
- 1.Bb5?
- threat
- 2.Bb2#
- 1...Rxb4
- 2.Re1#
- 1...Rxb5
- 2.e8Q#
- 2.e8R#
- 1...Rb2
- 2.Bxb2#
- 2.Re1#
- 1...Rb3
- 2.Re1#
- 1...Bg1
- 2.Sxg3#
- 1...Bxd5!
- threat
- 1.Bb2?
- threat
- 2.Bb5#
- 1...Rxb2
- 2.Re1#
- 1...Rxb4
- 2.e8Q#
- 2.e8R#
- 1...Bxd5
- 2.Bxd5#
- 1...Rb5
- 2.Bxb5#
- 2.e8Q#
- 2.e8R#
- 1...Bg1!
- threat
- 1.Bb6?
- threat
- 2.Bb3#
- 1...Rxb4
- 2.Re1#
- 1...Rxb6
- 2.e8Q#
- 2.e8R#
- 1...Bxd5
- 2.Bxd5#
- 1...Rb3
- 2.Bxb3#
- 2.Re1#
- 1...Bg1
- 2.Sxg3#
- 1...d2!
- threat
- 1.Rb3?
- threat
- 2.Bxd3#
- 1...R1xb3
- 2.Re1#
- 1...R8xb3
- 2.e8Q#
- 2.e8R#
- 1...d2
- 2.Bd3#
- 2.Re3#
- 1...axb3!
- threat
- 1.Rxb8?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Rxc1
- 2.e8Q#
- 2.e8R#
- 1...Rxb8
- 2.Re1#
- 1...Bxd5
- 2.Bxd5#
- 1...Ra1
- 2.e8Q#
- 2.e8R#
- 1...Rb2
- 2.Re1#
- 2.e8Q#
- 2.e8R#
- 1...Rb3
- 2.Re1#
- 2.e8Q#
- 2.e8R#
- 1...Rb4
- 2.Re1#
- 2.e8Q#
- 2.e8R#
- 1...Rb5
- 2.Re1#
- 2.e8Q#
- 2.e8R#
- 1...Rb6
- 2.Re1#
- 2.e8Q#
- 2.e8R#
- 1...Rb7
- 2.Re1#
- 2.e8Q#
- 2.e8R#
- 1...Bg1
- 2.e8Q#
- 2.e8R#
- 1...Bb7
- 2.e8Q#
- 2.e8R#
- 1...d2
- 2.e8Q#
- 2.e8R#
- 1...g2
- 2.e8Q#
- 2.e8R#
- 1...a3
- 2.e8Q#
- 2.e8R#
- 1...f6
- 2.e8Q#
- 2.e8R#
- 1...g5
- 2.e8Q#
- 2.e8R#
- 1...g6
- 2.e8Q#
- 2.e8R#
- 1...Bc6!
- threat
- 1.Sb5?
- Keys
- 1.Bb3!
- threat
- 2.Bb6#
- 1...Rxb3
- 2.Re1#
- 1...Rxb4
- 2.e8Q#
- 2.e8R#
- 1...Bxd5
- 2.Bxd5#
- 1...d2
- 2.Bxc2#
- 1...Rb5
- 2.e8Q#
- 2.e8R#
- 1...Rb6
- 2.Bxb6#
- 2.e8Q#
- 2.e8R#
- 1...Bg1
- 2.Sxg3#
- threat
- 1.Bb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(a);N_GUARD::R(A)
- R(a);N_GUARD,XR(B)::R(A)
- R(l);N_GUARD,XR(B)::P=Q
- R(l);N_GUARD::P=Q
- B(k);OGATE,XP(H)::B(C),XB(k)
- Tries
- Try
- S(K);
- Threat
- S(K)
- Vars
- R(l);N_GUARD,XS(K)::P=Q
- R(a);N_GUARD::R(A)
- Refutation
- P(h);XS(K)
- Try
- S(K);XP(h)
- Threat
- S(K)
- Vars
- R(l);N_GUARD::P=Q
- Refutation
- R(l);
- Try
- S(K);
- Threat
- DUALS(2)
- Vars
- R(l);::S(K)
- P(i);::S(K)
- Refutation
- P(i);XS(K)
- Try
- B(C);
- Threat
- R(B)+B(D)
- Vars
- R(a);N_GUARD,XR(B)::R(A)
- R(l);N_GUARD,XB(C)::P=Q
- R(a);N_GUARD::R(A)
- B(c);N_GUARD::S(I),XP(e)
- Refutation
- B(k);XP(H)
- Try
- B(D);
- Threat
- R(B)+B(C)
- Vars
- R(a);N_GUARD,XB(D)::R(A)
- R(l);N_GUARD,XR(B)::P=Q
- B(k);OGATE,XP(H)::R(B)+B(C),DCHECK,XB(k)
- Refutation
- B(c);
- Try
- B(D);
- Threat
- R(B)+B(C)
- Vars
- R(a);N_GUARD,XR(B)::R(A)
- R(l);N_GUARD,XB(D)::P=Q
- B(k);OGATE,XP(H)::R(B)+B(C),DCHECK,XB(k)
- B(c);N_GUARD::S(I),XP(e)
- Refutation
- P(d);
- Try
- R(B);
- Threat
- B(C),XP(d)
- Vars
- R(a);N_GUARD,XR(B)::R(A)
- R(l);N_GUARD,XR(B)::P=Q
- Refutation
- P(f);XR(B)
- Try
- R(B);XR(l)
- Threat
- P=Q
- Vars
- R(a);XR(A)::P=Q
- R(a);N_GUARD,XR(B)::R(A)
- B(k);OGATE,XP(H)::B(C),XB(k)
- R(a);::P=Q
- B(c);::P=Q
- B(k);::P=Q
- P(d);::P=Q
- P(e);::P=Q
- P(f);::P=Q
- P(i);::P=Q
- P(j);::P=Q
- Refutation
- B(k);
- Try
- Actual
- B(C);
- Threat
- R(B)+B(D)
- Vars
- R(a);N_GUARD,XB(C)::R(A)
- R(l);N_GUARD,XR(B)::P=Q
- B(k);OGATE,XP(H)::B(C),XB(k)
- P(d);OGATEB::B(C),XP(b)
- R(l);N_GUARD::P=Q
- B(c);N_GUARD::S(I),XP(e)
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).