MESON Chess Problem Database
Problem Display
PID: 40831 (3Nqr2/3P2N1/2Pp1bRn/1K1kP3/1PR2p2/2Bp1b1Q/B4r1n/8 w - - 0 1)
Byas, Walter
1st Prize, British Chess Magazine, 1947
#2
12 + 11
| 3105 | FIDE Album (1945-1955) | 1964 |
SOLUTION
- SOUND
- Sets
- 1...Qxg6
- 2.Qe6#
- 1...Qxe5
- 2.Rd4#
- 1...Qe6
- 2.Qxe6#
- 1...Qxd8
- 2.Qe6#
- 1...Rf1
- 2.Rxf4#
- 1...Bd1
- 2.Qxd3#
- 1...Bh1
- 2.Qxd3#
- 1...Be2
- 2.Rxf4#
- 1...Bg2
- 2.Qxd3#
- 1...Be4
- 2.Rc5#
- 1...Bg4
- 2.Qxd3#
- 1...Bh5
- 2.Qxd3#
- 1...Bh4
- 2.Rxd6#
- 1...Bxe5
- 2.Rd4#
- 1...Bg5
- 2.Rxd6#
- 1...Be7
- 2.Qe6#
- 1...Bxg7
- 2.Rxd6#
- 1...Bxd8
- 2.Rxd6#
- 1...d2
- 2.Rxf4#
- 1...dxe5
- 2.Rd4#
- 1...Qxg6
- Tries
- 1.Sge6?
- threat
- 2.Sxf4#
- 2.Sc7#
- 1...Qxd7
- 2.Sxf4#
- 1...Qxe6
- 2.Qxe6#
- 1...Qxd8
- 2.Sxf4#
- 1...Bxe5
- 2.Sc7#
- 2.Rd4#
- 1...dxe5
- 2.Rd4#
- 1...Bd1
- 2.Sc7#
- 2.Qxd3#
- 1...Bh1
- 2.Sc7#
- 2.Qxd3#
- 1...Be2
- 2.Sc7#
- 2.Rxf4#
- 1...Bg2
- 2.Sc7#
- 2.Qxd3#
- 1...Be4
- 2.Sc7#
- 2.Rc5#
- 1...Bg4
- 2.Sc7#
- 2.Qxd3#
- 1...Bh5
- 2.Sc7#
- 2.Qxd3#
- 1...Bh4
- 2.Sc7#
- 1...Bg5
- 2.Sc7#
- 1...Be7
- 2.Sc7#
- 1...Bg7
- 2.Sc7#
- 1...Bh8
- 2.Sc7#
- 1...Bxd8!
- threat
- 1.Sxe8?
- threat
- 2.Sc7#
- 2.Qe6#
- 1...Bxd8
- 2.Rxd6#
- 2.Qe6#
- 1...dxe5
- 2.Rd4#
- 2.Qe6#
- 1...Bg4
- 2.Sc7#
- 2.Qxd3#
- 1...S2g4
- 2.Sc7#
- 1...S6g4
- 2.Sc7#
- 1...Sf5
- 2.Sc7#
- 1...Rxe8!
- threat
- 1.Bb3?
- threat
- 2.Rxf4#
- 1...dxe5
- 2.Rd4#
- 1...Bd1
- 2.Qxd3#
- 1...Be4
- 2.Rc5#
- 1...Rb2!
- threat
- 1.Qf5?
- threat
- 2.Rd4#
- 2.Rc5#
- 2.Qxd3#
- 1...Qxg6
- 2.Rd4#
- 2.Rc5#
- 2.Qe6#
- 1...Qxe5
- 2.Rd4#
- 2.Rc5#
- 1...Rxa2
- 2.Rd4#
- 2.Qxd3#
- 1...Bxe5
- 2.Rd4#
- 2.Rc5#
- 1...dxe5
- 2.Rd4#
- 2.Qxd3#
- 1...Rd2
- 2.Rd4#
- 2.Rc5#
- 1...Be2
- 2.Rd4#
- 2.Re4#
- 2.Rxf4#
- 2.Rc5#
- 2.Qe4#
- 1...Be4
- 2.Rd4#
- 2.Rc5#
- 2.Qxe4#
- 1...d2
- 2.Rd4#
- 2.Re4#
- 2.Rxf4#
- 2.Rc5#
- 2.Qd3#
- 1...Sxf5!
- threat
- 1.Qxf3+?
- 1...Rxf3
- 2.Rxf4#
- 1...Sxf3!
- 1...Rxf3
- 1.dxe8Q?
- threat
- 2.Rd4#
- 2.Qhe6#
- 2.Qee6#
- 1...Sf5
- 2.Rd4#
- 2.Qe6#
- 1...Bg4
- 2.Rd4#
- 2.Qxd3#
- 1...Be7
- 2.Qe6#
- 1...S2g4
- 2.Rd4#
- 2.Qe6#
- 1...S6g4
- 2.Rd4#
- 2.Qe6#
- 1...Rxe8!
- threat
- 1.dxe8S?
- threat
- 2.Sc7#
- 2.Qe6#
- 1...Bxd8
- 2.Rxd6#
- 2.Qe6#
- 1...dxe5
- 2.Rd4#
- 2.Qe6#
- 2.Qd7#
- 1...Sf5
- 2.Sc7#
- 1...Rf7
- 2.Qe6#
- 1...Bg4
- 2.Sc7#
- 2.Qxd3#
- 1...S2g4
- 2.Sc7#
- 1...S6g4
- 2.Sc7#
- 1...Rxe8!
- threat
- 1.dxe8R?
- threat
- 2.Rd4#
- 2.Qe6#
- 1...Sf5
- 2.Rd4#
- 1...Bg4
- 2.Rd4#
- 2.Qxd3#
- 1...Be7
- 2.Qe6#
- 1...S2g4
- 2.Rd4#
- 1...S6g4
- 2.Rd4#
- 1...Rxe8!
- threat
- 1.Sge6?
- Keys
- 1.Sh5!
- threat
- 2.Sxf4#
- 1...Qxe5
- 2.Rd4#
- 1...Bxh5
- 2.Qxd3#
- 1...Bxe5
- 2.Rd4#
- 1...Bxd8
- 2.Rxd6#
- 1...dxe5
- 2.Rd4#
- 1...Bd1
- 2.Qxd3#
- 1...Bh1
- 2.Qxd3#
- 1...Be2
- 2.Rxf4#
- 1...Bg2
- 2.Qxd3#
- 1...Be4
- 2.Rc5#
- 1...Bg4
- 2.Qxd3#
- 1...Bh4
- 2.Rxd6#
- 1...Bg5
- 2.Rxd6#
- 1...Be7
- 2.Qe6#
- 1...Bg7
- 2.Rxd6#
- 1...Bh8
- 2.Rxd6#
- threat
- 1.Sh5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- Q(j);N_GUARD,XR(I)::QAB1(C)
- Q(j);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- Q(j);N_GUARD::QAB1(C),XQ(j)
- Q(j);N_GUARD,XS(L)::QAB1(C)
- R(a);N_GUARD::B(A)+R(E),XP(e)
- B(d);OGATE::QAR2(C),XP(c)
- B(d);S_CUTR(a)::B(A)+R(E),XP(e)
- B(d);SBLOCK::B(A)+R(E),DCHECK
- B(h);OGATE::R1(I),XP(g)
- B(h);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- B(h);S_CUTQ(j)::QAB1(C)
- B(h);OGATE,XS(K)::R1(I),XP(g)
- B(h);OGATE,XS(L)::R1(I),XP(g)
- P(c);S_CUTR(a)::B(A)+R(E),XP(e)
- P(g);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- Tries
- Try
- S(K);
- Threat
- DUALS(2)
- Vars
- Q(j);P_PINP(H),XP(J)::S(K),XP(e)
- Q(j);OGATE,XS(K)::QAB1(C),XQ(j)
- Q(j);XS(L)::S(K),XP(e)
- P(g);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- B(h);::S(K)
- Refutation
- B(h);XS(L)
- Try
- S(K);XQ(j)
- Threat
- DUALS(2)
- Vars
- S(b);::S(K)
- S(i);::S(K)
- Refutation
- R(k);XS(K)
- Try
- B(A);
- Threat
- B(A)+R(E),XP(e)
- Vars
- P(g);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- B(d);OGATE::QAR2(C),XP(c)
- B(d);SBLOCK::B(A)+R(E),DCHECK
- Refutation
- R(a);
- Try
- Q(C);
- Threat
- DUALS(3)
- Refutation
- S(i);XQ(C)
- Try
- Q(C);CHECK,XB(d)
- Vars
- R(a);XQ(C)::B(A)+R(E),XP(e)
- Refutation
- S(b);XQ(C)
- Try
- P(J);XQ(j)
- Threat
- DUALS(3)
- Vars
- B(h);::QAB1(C)
- Refutation
- R(k);XQ(J)
- Try
- P(J);XQ(j)
- Threat
- DUALS(2)
- Vars
- S(i);::S(J)
- R(k);::QAB1(C)
- S(b);::S(J)
- Refutation
- R(k);XS(J)
- Try
- P(J);XQ(j)
- Threat
- DUALS(2)
- Vars
- S(i);::B(A)+R(E),DCHECK
- B(h);::QAB1(C)
- S(b);::B(A)+R(E),DCHECK
- Refutation
- R(k);XR(J)
- Try
- Actual
- S(K);
- Threat
- S(K),XP(e)
- Vars
- Q(j);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- B(d);OGATE,XS(K)::QAR2(C),XP(c)
- B(h);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- B(h);OGATE,XS(L)::R1(I),XP(g)
- P(g);SBLOCK,XP(G)::B(A)+R(E),DCHECK
- B(d);OGATE::QAR2(C),XP(c)
- B(d);S_CUTR(a)::B(A)+R(E),XP(e)
- B(d);SBLOCK::B(A)+R(E),DCHECK
- B(h);OGATE::R1(I),XP(g)
- B(h);S_CUTQ(j)::QAB1(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).