MESON Chess Problem Database
Problem Display
PID: 140841 (1b2QK2/6RB/3p4/3pN2p/1B1p1k2/2rpN2R/qp3rp1/7b w - - 0 1)
Doukhan, Gerard
1st Prize, The Problemist, 1983
#2
8 + 13
| 6490 | yacpdb | 2011 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxd5#
- 1...Qa1
- 2.Sxd5#
- 1...Qa3
- 2.Sxd5#
- 1...Qa4
- 2.Sxd5#
- 1...Qa6
- 2.Sxd5#
- 1...Qa7
- 2.Sxd5#
- 1...Rfc2
- 2.Rf3#
- 1...Rd2
- 2.Rf3#
- 1...Re2
- 2.Rf3#
- 1...Rf3
- 2.Rxf3#
- 1...Rc1
- 2.Sxd3#
- 1...Rcc2
- 2.Sxd3#
- 1...Rb3
- 2.Sxd5#
- 1...Rc4
- 2.Sxd5#
- 2.Sxd3#
- 1...Rc5
- 2.Sxd3#
- 1...Rc6
- 2.Sxd3#
- 1...Rc7
- 2.Sxd3#
- 1...Rc8
- 2.Sxd3#
- 1...dxe3
- 2.Rh4#
- 1...h4
- 2.Rg4#
- 1...dxe5
- 2.Qf7#
- 1...Qb1
- Tries
- 1.Sxg2+?
- 1...Rxg2
- 2.Rf3#
- 1...Bxg2!
- 1...Rxg2
- 1.S3g4?
- threat
- 2.Qf7#
- 1...hxg4
- 2.Rxg4#
- 1...Rc7
- 2.Sxd3#
- 1...Rc8
- 2.Sxd3#
- 1...Qa7!
- threat
- 1.S5c4?
- threat
- 2.Sxd5#
- 2.Qf7#
- 1...Rxc4
- 2.Sxd5#
- 1...dxe3
- 2.Qf7#
- 2.Qxe3#
- 1...dxc4
- 2.Sd5#
- 2.Qe4#
- 1...g1Q
- 2.Qf7#
- 1...g1S
- 2.Qf7#
- 1...g1B
- 2.Qf7#
- 1...g1R
- 2.Qf7#
- 1...Qa5
- 2.Qf7#
- 1...Qa7
- 2.Sxd5#
- 1...Qa8
- 2.Qf7#
- 1...Qxc4!
- threat
- 1.S5g4?
- threat
- 2.Qf7#
- 1...hxg4
- 2.Rxg4#
- 1...Qa7
- 2.Sxd5#
- 1...Rc7
- 2.Bxd6#
- 1...Rc8!
- threat
- 1.Sc6?
- threat
- 2.Qf7#
- 1...Qa7
- 2.Sxd5#
- 1...Rf3
- 2.Rh4#
- 1...Rxc6!
- threat
- 1.Sd7?
- threat
- 2.Qf7#
- 1...Rf3
- 2.Rh4#
- 1...Rc8!
- threat
- 1.Bxd6?
- threat
- 2.Sxd3#
- 2.Qf7#
- 1...Rf3
- 2.Sxd3#
- 2.Rxf3#
- 1...Qa7
- 2.Sxd5#
- 2.Sxd3#
- 1...Rc7
- 2.Sxd3#
- 2.Sf3#
- 2.S5c4#
- 2.S5g4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 1...Rc8
- 2.Sxd3#
- 1...d2
- 2.Sd3#
- 2.Qf7#
- 1...Bxd6+!
- threat
- 1.Rgg3?
- threat
- 2.Sg6#
- 1...dxe5
- 2.Qf7#
- 1...dxe3!
- threat
- 1.Qxh5?
- threat
- 2.Rg4#
- 2.Rf7#
- 2.Qf5#
- 2.Qg5#
- 1...Rf3
- 2.Rxf3#
- 2.Qg5#
- 1...g1Q
- 2.Rf7#
- 2.Qf5#
- 1...g1R
- 2.Rf7#
- 2.Qf5#
- 1...Qa7
- 2.Sxd5#
- 2.Rg4#
- 2.Qf5#
- 2.Qg5#
- 1...Rc7
- 2.Sxd3#
- 2.Rg4#
- 2.Qf5#
- 2.Qg5#
- 1...Rc8+!
- threat
- 1.Qe6?
- threat
- 2.Qf5#
- 2.Qf6#
- 1...Rf3
- 2.Rxf3#
- 1...Rc8+!
- threat
- 1.Qe7?
- threat
- 2.Sg6#
- 2.Rf7#
- 2.Qg5#
- 2.Qf6#
- 1...dxe3
- 2.Rh4#
- 2.Rf7#
- 2.Qg5#
- 2.Qf6#
- 1...dxe5
- 2.Rf7#
- 2.Qh4#
- 2.Qg5#
- 2.Qf6#
- 2.Qf7#
- 1...Rf3
- 2.Sg6#
- 2.Rxf3#
- 2.Qg5#
- 1...g1Q
- 2.Rf7#
- 2.Qf6#
- 1...g1R
- 2.Rf7#
- 2.Qf6#
- 1...Rc8+!
- threat
- 1.Qd8?
- threat
- 2.Qg5#
- 2.Qf6#
- 1...Rf3
- 2.Qg5#
- 1...g1Q
- 2.Qf6#
- 1...g1R
- 2.Qf6#
- 1...Rc8
- 2.Sxd3#
- 1...Kxe5+!
- threat
- 1.Sxg2+?
- Keys
- 1.Sf3!
- threat
- 2.Rf7#
- 1...Rxf3
- 2.Rh4#
- 1...dxe3
- 2.Qf7#
- 1...Qa7
- 2.Sxd5#
- 1...Rc7
- 2.Bxd6#
- threat
- 1.Sf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 16
- Sets
- Q(b);N_GUARD::S(A),XP(j)
- R(d);N_GUARD::R1(B)
- R(d);N_GUARD::R1(B),XR(d)
- R(f);N_GUARD::S(D),XP(g)
- R(f);S_CUTQ(b)::S(A),XP(j)
- R(f);N_GUARD,P_PINQ(G)::S(D),XP(g)
- P(h);SBLOCK,XS(A)::R(B)
- P(k);N_GUARD::R1(E)
- P(l);SBLOCK,XS(D)::QAR(G)
- Tries
- Try
- S(A);CHECK,XP(e)
- Vars
- R(d);XS(A)::R1(B)
- Refutation
- B(a);XS(A)
- Try
- S(A);
- Threat
- QAR(G)
- Vars
- P(k);OGATE,XS(A)::R1(E),XP(k)
- R(f);N_GUARD::S(D),XP(g)
- R(f);N_GUARD,P_PINQ(G)::S(D),XP(g)
- Refutation
- Q(b);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(f);XS(D)::S(A),XP(j)
- P(e);::QAR(G)
- Q(b);::QAR(G)
- Q(b);::S(A),XP(j)
- Refutation
- Q(b);XS(D)
- Try
- S(D);
- Threat
- QAR(G)
- Vars
- P(k);OGATE,XS(D)::R1(E),XP(k)
- Q(b);N_GUARD::S(A),XP(j)
- R(f);S_CUTB(m)::B(C),XP(l)
- Refutation
- R(f);P_PINQ(G)
- Try
- S(D);
- Threat
- QAR(G)
- Vars
- Q(b);N_GUARD::S(A),XP(j)
- R(d);SBLOCK::R(B)
- Refutation
- R(f);XS(D)
- Try
- S(D);
- Threat
- QAR(G)
- Vars
- R(d);SBLOCK::R(B)
- Refutation
- R(f);P_PINQ(G)
- Try
- B(C);XP(l)
- Threat
- DUALS(2)
- Vars
- R(f);P_PINQ(G)::B(C)+S(D),DCHECK,XP(g)
- Refutation
- B(m);CHECK,XB(C)
- Try
- R(E);
- Threat
- S(D)
- Vars
- P(l);SBLOCK,XS(D)::QAR(G)
- Refutation
- P(h);XS(A)
- Try
- Q(G);XP(k)
- Threat
- DUALS(4)
- Refutation
- R(f);CHECK
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(d);N_GUARD::R1(B),XR(d)
- Refutation
- R(f);CHECK
- Try
- Q(G);
- Threat
- DUALS(4)
- Refutation
- R(f);CHECK
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(d);::QAB1(G)
- P(e);::QAR2(G)
- R(f);N_GUARD,P_PINQ(G)::S(D),XP(g)
- Refutation
- K(i);CHECK,S_FLIGHT,XS(D)
- Try
- Actual
- S(D);
- Threat
- R(E)
- Vars
- R(d);SBLOCK,XS(D)::R(B)
- P(h);SBLOCK,XS(A)::QAR(G)
- Q(b);N_GUARD::S(A),XP(j)
- R(f);S_CUTB(m)::B(C),XP(l)
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).