MESON Chess Problem Database
Problem Display
PID: 18712 (3br1N1/1p2R1pK/B1P5/R2NBk2/1P1p4/3pQP2/8/2q1rb2 w - - 0 1)
Mansfield, Comins
1st Comm., The Problemist, 1957
#2
11 + 10
| 3550 | Complete Mansfield/II | 1997 |
| 3166 | Finnish Solving Championship | 2000 |
| 5635 | Czech Republic Solving Ty. | 2003 |
| 5926 | Chess Solving Yearbook 2000 | 2004 |
| 5405 | Chess Solving Yearbook 2003 | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Qf4#
- 1...Qa3
- 2.Qf4#
- 1...Qa1
- 2.Qf4#
- 1...Qb1
- 2.Qf4#
- 1...Qd1
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qc4
- 2.Qf4#
- 1...Qc5
- 2.Qf4#
- 1...Qxc6
- 2.Qf4#
- 1...Re2
- 2.Bxd3#
- 1...Bg2
- 2.Bxd3#
- 1...Bh3
- 2.Bxd3#
- 1...d2
- 2.Qf4#
- 1...bxc6
- 2.Bc8#
- 1...b5
- 2.Bc8#
- 1...b6
- 2.Bc8#
- 1...g5
- 2.Sh6#
- 1...g6
- 2.Sh6#
- 1...Qb2
- Tries
- 1.Bh2?
- 1...Qxe3
- 2.Sxe3#
- 1...Qxc6
- 2.Qf4#
- 1...Rxe3
- 2.Sxe3#
- 1...Rxe7
- 2.Sdxe7#
- 1...Rxg8
- 2.Re5#
- 1...Bxa5
- 2.Rf7#
- 1...Bxe7
- 2.Sdxe7#
- 1...dxe3
- 2.Sxe3#
- 1...bxc6
- 2.Bc8#
- 1...Qb2
- 2.Sb6#
- 2.Qf4#
- 1...Qd2
- 2.Sb6#
- 1...Qa3
- 2.Qf4#
- 1...Qa1
- 2.Qf4#
- 1...Qb1
- 2.Sb6#
- 2.Qf4#
- 1...Qd1
- 2.Sb6#
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qc4
- 2.Qf4#
- 1...Qc5
- 2.Qf4#
- 1...Rd1
- 2.Qe5#
- 1...Re2
- 2.Bxd3#
- 1...Rf8
- 2.Re5#
- 1...Be2
- 2.Qe5#
- 1...Bg2
- 2.Bxd3#
- 1...Bh3
- 2.Bxd3#
- 1...Bb6
- 2.Rf7#
- 1...Bc7
- 2.Rf7#
- 1...d2
- 2.Qf4#
- 1...b5
- 2.Bc8#
- 1...b6
- 2.Bc8#
- 1...g5
- 2.Sh6#
- 1...g6
- 2.Sh6#
- 1...bxa6!
- 1...Qxe3
- 1.Bg3?
- 1...Qxe3
- 2.Sxe3#
- 1...Qxc6
- 2.Qf4#
- 1...Rxe3
- 2.Sxe3#
- 1...Rxe7
- 2.Sdxe7#
- 1...Rxg8
- 2.Re5#
- 1...Bxa5
- 2.Rf7#
- 1...Bxe7
- 2.Sdxe7#
- 1...dxe3
- 2.Sxe3#
- 1...bxc6
- 2.Bc8#
- 1...Qb2
- 2.Sb6#
- 2.Qf4#
- 1...Qd2
- 2.Sb6#
- 1...Qa3
- 2.Qf4#
- 1...Qa1
- 2.Qf4#
- 1...Qb1
- 2.Sb6#
- 2.Qf4#
- 1...Qd1
- 2.Sb6#
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qc4
- 2.Qf4#
- 1...Qc5
- 2.Qf4#
- 1...Rd1
- 2.Qe5#
- 1...Re2
- 2.Bxd3#
- 1...Rf8
- 2.Re5#
- 1...Be2
- 2.Qe5#
- 1...Bg2
- 2.Bxd3#
- 1...Bh3
- 2.Bxd3#
- 1...Bb6
- 2.Rf7#
- 1...Bc7
- 2.Rf7#
- 1...d2
- 2.Qf4#
- 1...b5
- 2.Bc8#
- 1...b6
- 2.Bc8#
- 1...g5
- 2.Sh6#
- 1...g6
- 2.Sh6#
- 1...bxa6!
- 1...Qxe3
- 1.Bd6?
- 1...Qxe3
- 2.Sxe3#
- 1...Qxc6
- 2.Qf4#
- 1...Rxe3
- 2.Sxe3#
- 1...Rxe7
- 2.Sdxe7#
- 1...Rxg8
- 2.Re5#
- 1...Bxa5
- 2.Rf7#
- 1...Bxe7
- 2.Sdxe7#
- 1...dxe3
- 2.Sxe3#
- 1...bxc6
- 2.Bc8#
- 1...Qb2
- 2.Sb6#
- 2.Qf4#
- 1...Qd2
- 2.Sb6#
- 1...Qa3
- 2.Qf4#
- 1...Qa1
- 2.Qf4#
- 1...Qb1
- 2.Sb6#
- 2.Qf4#
- 1...Qd1
- 2.Sb6#
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qc4
- 2.Qf4#
- 1...Qc5
- 2.Qf4#
- 1...Rd1
- 2.Qe5#
- 1...Re2
- 2.Bxd3#
- 1...Rf8
- 2.Re5#
- 1...Be2
- 2.Qe5#
- 1...Bg2
- 2.Bxd3#
- 1...Bh3
- 2.Bxd3#
- 1...Bb6
- 2.Rf7#
- 1...Bc7
- 2.Rf7#
- 1...d2
- 2.Qf4#
- 1...b5
- 2.Bc8#
- 1...b6
- 2.Bc8#
- 1...g5
- 2.Sh6#
- 1...g6
- 2.Sh6#
- 1...bxa6!
- 1...Qxe3
- 1.Bb8?
- 1...Qxe3
- 2.Sxe3#
- 1...Qxc6
- 2.Qf4#
- 1...Rxe3
- 2.Sxe3#
- 1...Rxe7
- 2.Sdxe7#
- 1...Rxg8
- 2.Re5#
- 1...Bxa5
- 2.Rf7#
- 1...Bxe7
- 2.Sdxe7#
- 1...dxe3
- 2.Sxe3#
- 1...bxc6
- 2.Bc8#
- 1...Qb2
- 2.Sb6#
- 2.Qf4#
- 1...Qd2
- 2.Sb6#
- 1...Qa3
- 2.Qf4#
- 1...Qa1
- 2.Qf4#
- 1...Qb1
- 2.Sb6#
- 2.Qf4#
- 1...Qd1
- 2.Sb6#
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qc4
- 2.Qf4#
- 1...Qc5
- 2.Qf4#
- 1...Rd1
- 2.Qe5#
- 1...Re2
- 2.Bxd3#
- 1...Rf8
- 2.Re5#
- 1...Be2
- 2.Qe5#
- 1...Bg2
- 2.Bxd3#
- 1...Bh3
- 2.Bxd3#
- 1...Bb6
- 2.Rf7#
- 1...Bc7
- 2.Rf7#
- 1...d2
- 2.Qf4#
- 1...b5
- 2.Bc8#
- 1...b6
- 2.Bc8#
- 1...g5
- 2.Sh6#
- 1...g6
- 2.Sh6#
- 1...bxa6!
- 1...Qxe3
- 1.Qe4+?
- 1...Kg5
- 2.Qg4#
- 1...Rxe4!
- 1...Kg5
- 1.Bh2?
- Keys
- 1.Bc7!
- 1...Qxe3
- 2.Sxe3#
- 1...Qxc6
- 2.Qf4#
- 1...Rxe3
- 2.Sxe3#
- 1...Rxe7
- 2.Sdxe7#
- 1...Rxg8
- 2.Re5#
- 1...Bxc7
- 2.Rf7#
- 1...Bxe7
- 2.Sdxe7#
- 1...dxe3
- 2.Sxe3#
- 1...bxa6
- 2.Sc3#
- 1...bxc6
- 2.Bc8#
- 1...Qb2
- 2.Sb6#
- 2.Qf4#
- 1...Qd2
- 2.Sb6#
- 1...Qa3
- 2.Qf4#
- 1...Qa1
- 2.Qf4#
- 1...Qb1
- 2.Sb6#
- 2.Qf4#
- 1...Qd1
- 2.Sb6#
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qc3
- 2.Qf4#
- 1...Qc4
- 2.Qf4#
- 1...Qc5
- 2.Qf4#
- 1...Rd1
- 2.Qe5#
- 1...Re2
- 2.Bxd3#
- 1...Rf8
- 2.Re5#
- 1...Be2
- 2.Qe5#
- 1...Bg2
- 2.Bxd3#
- 1...Bh3
- 2.Bxd3#
- 1...d2
- 2.Qf4#
- 1...b5
- 2.Bc8#
- 1...b6
- 2.Bc8#
- 1...g5
- 2.Sh6#
- 1...g6
- 2.Sh6#
- 1...Qxe3
- 1.Bc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD::QAR1(A)
- Q(a);N_GUARD,XP(H)::QAR1(A)
- R(b);S_CUTB(c)::B(G),XP(d)
- B(c);N_GUARD::B(G),XP(d)
- P(d);S_CUTQ(a)::QAR1(A)
- P(g);OGATE,XP(H)::B(G)
- P(g);OGATE::B(G)
- P(h);N_GUARD::S(K)
- Tries
- Try
- B(F);
- Vars
- Q(a);XQ(A)::R(D)+S(E),DCHECK,XQ(a)
- Q(a);N_GUARD,XP(H)::QAR1(A)
- R(b);XQ(A)::R(D)+S(E),DCHECK,XR(b)
- R(j);XR(I)::R(D)+S(E),DCHECK,XR(j)
- R(j);N_GUARD,XS(K)::R1(I)
- B(i);N_GUARD,XR(D)::R(I)
- B(i);XR(I)::R(D)+S(E),DCHECK,XB(i)
- P(e);XQ(A)::R(D)+S(E),DCHECK,XP(e)
- P(g);OGATE,XP(H)::B(G)
- Q(a);N_GUARD::R(D)+S(E)
- Q(a);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A)
- R(b);S_CUTB(c)::B(G),XP(d)
- R(j);N_GUARD::R1(I)
- B(c);S_CUTR(b)::QAR1(A)
- B(c);N_GUARD::B(G),XP(d)
- B(i);N_GUARD::R(I)
- P(d);S_CUTQ(a)::QAR1(A)
- P(g);OGATE::B(G)
- P(h);N_GUARD::S(K)
- Refutation
- P(g);XB(G)
- Try
- B(F);
- Vars
- Q(a);XQ(A)::R(D)+S(E),DCHECK,XQ(a)
- Q(a);N_GUARD,XP(H)::QAR1(A)
- R(b);XQ(A)::R(D)+S(E),DCHECK,XR(b)
- R(j);XR(I)::R(D)+S(E),DCHECK,XR(j)
- R(j);N_GUARD,XS(K)::R1(I)
- B(i);N_GUARD,XR(D)::R(I)
- B(i);XR(I)::R(D)+S(E),DCHECK,XB(i)
- P(e);XQ(A)::R(D)+S(E),DCHECK,XP(e)
- P(g);OGATE,XP(H)::B(G)
- Q(a);N_GUARD::R(D)+S(E)
- Q(a);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A)
- R(b);S_CUTB(c)::B(G),XP(d)
- R(j);N_GUARD::R1(I)
- B(c);S_CUTR(b)::QAR1(A)
- B(c);N_GUARD::B(G),XP(d)
- B(i);N_GUARD::R(I)
- P(d);S_CUTQ(a)::QAR1(A)
- P(g);OGATE::B(G)
- P(h);N_GUARD::S(K)
- Refutation
- P(g);XB(G)
- Try
- B(F);
- Vars
- Q(a);XQ(A)::R(D)+S(E),DCHECK,XQ(a)
- Q(a);N_GUARD,XP(H)::QAR1(A)
- R(b);XQ(A)::R(D)+S(E),DCHECK,XR(b)
- R(j);XR(I)::R(D)+S(E),DCHECK,XR(j)
- R(j);N_GUARD,XS(K)::R1(I)
- B(i);N_GUARD,XR(D)::R(I)
- B(i);XR(I)::R(D)+S(E),DCHECK,XB(i)
- P(e);XQ(A)::R(D)+S(E),DCHECK,XP(e)
- P(g);OGATE,XP(H)::B(G)
- Q(a);N_GUARD::R(D)+S(E)
- Q(a);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A)
- R(b);S_CUTB(c)::B(G),XP(d)
- R(j);N_GUARD::R1(I)
- B(c);S_CUTR(b)::QAR1(A)
- B(c);N_GUARD::B(G),XP(d)
- B(i);N_GUARD::R(I)
- P(d);S_CUTQ(a)::QAR1(A)
- P(g);OGATE::B(G)
- P(h);N_GUARD::S(K)
- Refutation
- P(g);XB(G)
- Try
- B(F);
- Vars
- Q(a);XQ(A)::R(D)+S(E),DCHECK,XQ(a)
- Q(a);N_GUARD,XP(H)::QAR1(A)
- R(b);XQ(A)::R(D)+S(E),DCHECK,XR(b)
- R(j);XR(I)::R(D)+S(E),DCHECK,XR(j)
- R(j);N_GUARD,XS(K)::R1(I)
- B(i);N_GUARD,XR(D)::R(I)
- B(i);XR(I)::R(D)+S(E),DCHECK,XB(i)
- P(e);XQ(A)::R(D)+S(E),DCHECK,XP(e)
- P(g);OGATE,XP(H)::B(G)
- Q(a);N_GUARD::R(D)+S(E)
- Q(a);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A)
- R(b);S_CUTB(c)::B(G),XP(d)
- R(j);N_GUARD::R1(I)
- B(c);S_CUTR(b)::QAR1(A)
- B(c);N_GUARD::B(G),XP(d)
- B(i);N_GUARD::R(I)
- P(d);S_CUTQ(a)::QAR1(A)
- P(g);OGATE::B(G)
- P(h);N_GUARD::S(K)
- Refutation
- P(g);XB(G)
- Try
- Q(A);CHECK
- Vars
- K(f);P-FLIGHT::QAR1(A)
- Refutation
- R(b);XQ(A)
- Try
- Actual
- B(F);
- Vars
- Q(a);XQ(A)::R(D)+S(E),DCHECK,XQ(a)
- Q(a);N_GUARD,XP(H)::QAR1(A)
- R(b);XQ(A)::R(D)+S(E),DCHECK,XR(b)
- R(j);XR(I)::R(D)+S(E),DCHECK,XR(j)
- R(j);N_GUARD,XS(K)::R1(I)
- B(i);N_GUARD,XB(F)::R(I)
- B(i);XR(I)::R(D)+S(E),DCHECK,XB(i)
- P(e);XQ(A)::R(D)+S(E),DCHECK,XP(e)
- P(g);N_GUARD,XB(G)::R(D)+S(E)
- P(g);OGATE,XP(H)::B(G)
- Q(a);N_GUARD::R(D)+S(E)
- Q(a);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A)
- R(b);S_CUTB(c)::B(G),XP(d)
- R(j);N_GUARD::R1(I)
- B(c);S_CUTR(b)::QAR1(A)
- B(c);N_GUARD::B(G),XP(d)
- P(d);S_CUTQ(a)::QAR1(A)
- P(g);OGATE::B(G)
- P(h);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).