MESON Chess Problem Database
Problem Display
PID: 102540 (8/b2N1n2/b3p3/Q7/2Pk4/2ppNP2/5K2/5B2 w - - 0 1)
Lazard, Frederic
L'Echiquier, 1928
#2
7 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bxc4
- 2.Qxa7#
- 1...Bb5
- 2.Qxa7#
- 1...Bb7
- 2.Qxa7#
- 1...Bc8
- 2.Qxa7#
- 1...Bc5
- 2.Qxc5#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qb6#
- 2.Qc5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sd6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...c2
- 2.Qa1#
- 1...d2
- 2.Sc2#
- 1...e5
- 2.Qd5#
- 1...Bxc4
- Tries
- 1.Sf5+?
- 1...exf5
- 2.Qd5#
- 1...Kxc4+!
- 1...exf5
- 1.Be2?
- 1...Bxc4
- 2.Qxa7#
- 1...c2
- 2.Qa1#
- 1...Bb5
- 2.Qxa7#
- 1...Bb7
- 2.Qxa7#
- 1...Bc8
- 2.Qxa7#
- 1...Bc5
- 2.Qxc5#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qb6#
- 2.Qc5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sd6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...d2
- 2.Sc2#
- 1...e5
- 2.Qd5#
- 1...dxe2!
- 1...Bxc4
- 1.Bg2?
- 1...Bxc4
- 2.Qxa7#
- 1...c2
- 2.Qa1#
- 1...Bb5
- 2.Qxa7#
- 1...Bb7
- 2.Qxa7#
- 1...Bc8
- 2.Qxa7#
- 1...Bc5
- 2.Qxc5#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qb6#
- 2.Qc5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sd6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...e5
- 2.Qd5#
- 1...d2!
- 1...Bxc4
- 1.Bh3?
- 1...Bxc4
- 2.Qxa7#
- 1...c2
- 2.Qa1#
- 1...Bb5
- 2.Qxa7#
- 1...Bb7
- 2.Qxa7#
- 1...Bc8
- 2.Qxa7#
- 1...Bc5
- 2.Qxc5#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qb6#
- 2.Qc5#
- 1...Se5
- 2.Qxe5#
- 1...Sg5
- 2.Qe5#
- 1...Sd6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...e5
- 2.Qd5#
- 1...d2!
- 1...Bxc4
- 1.Qf5?
- threat
- 2.Qxd3#
- 2.Qe4#
- 2.Qg4#
- 2.Qf4#
- 1...Bxc4
- 2.Qe4#
- 2.Qg4#
- 2.Qf4#
- 1...c2
- 2.Qxd3#
- 1...Bb7
- 2.Qxd3#
- 1...Bb8
- 2.Qxd3#
- 2.Qe4#
- 2.Qc5#
- 1...Se5
- 2.Qe4#
- 2.Qf4#
- 2.Qxe5#
- 1...Sg5
- 2.Qxd3#
- 2.Qe5#
- 1...Sd6
- 2.Qxd3#
- 2.Qe5#
- 1...Sh6
- 2.Qxd3#
- 2.Qe4#
- 2.Qf4#
- 2.Qe5#
- 1...d2
- 2.Sc2#
- 2.Qd3#
- 2.Qe4#
- 2.Qg4#
- 2.Qf4#
- 1...e5
- 2.Qxd3#
- 2.Qe4#
- 1...exf5!
- threat
- 1.Qxa6?
- threat
- 2.Qxa7#
- 1...c2
- 2.Qa1#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qb6#
- 1...Bc5!
- threat
- 1.Sf5+?
- Keys
- 1.Qb4!
- 1...Bxc4
- 2.Qxc4#
- 1...c2
- 2.Qb2#
- 1...Bb5
- 2.cxb5#
- 1...Bb7
- 2.c5#
- 1...Bc8
- 2.c5#
- 1...Bc5
- 2.Qxc5#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qc5#
- 2.Qb6#
- 1...Se5
- 2.Qd6#
- 1...Sg5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sh6
- 2.Qd6#
- 1...Sd8
- 2.Qd6#
- 1...Sh8
- 2.Qd6#
- 1...d2
- 2.Sc2#
- 1...e5
- 2.Sf5#
- 1...Bxc4
- 1.Qb4!
This is a version of 6284
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 12
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(d);OGATE,XP(E)::QAB(F),XB(f)
- B(d);OGATE::QAB(F),XB(f)
- B(f);N_GUARD::QAB1(F),XB(f)
- B(f);N_GUARD::QAB(F),XB(f)
- S(g);N_GUARD::QAB1(F),XS(g)
- S(g);N_GUARD::QAB1(F)
- P(a);OGATEB::QAB(F)
- P(b);N_GUARD::S(C)
- P(e);N_GUARD::QAR1(F)
- Tries
- Try
- S(C);CHECK
- Vars
- P(e);XS(C)::QAR1(F)
- Refutation
- K(c);CHECK,P-FLIGHT,P_SPINP(b),XP(E)
- Try
- B(A);
- Vars
- B(d);OGATE,XP(E)::QAB(F),XB(f)
- P(a);OGATEB::QAB(F)
- B(d);OGATE::QAB(F),XB(f)
- B(f);N_GUARD::QAB1(F),XB(f)
- B(f);N_GUARD::QAB(F),XB(f)
- S(g);N_GUARD::QAB1(F),XS(g)
- S(g);N_GUARD::QAB1(F)
- P(b);N_GUARD::S(C)
- P(e);N_GUARD::QAR1(F)
- Refutation
- P(b);XB(A)
- Try
- B(A);
- Vars
- B(d);OGATE,XP(E)::QAB(F),XB(f)
- P(a);OGATEB::QAB(F)
- B(d);OGATE::QAB(F),XB(f)
- B(f);N_GUARD::QAB1(F),XB(f)
- B(f);N_GUARD::QAB(F),XB(f)
- S(g);N_GUARD::QAB1(F),XS(g)
- S(g);N_GUARD::QAB1(F)
- P(e);N_GUARD::QAR1(F)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- B(d);OGATE,XP(E)::QAB(F),XB(f)
- P(a);OGATEB::QAB(F)
- B(d);OGATE::QAB(F),XB(f)
- B(f);N_GUARD::QAB1(F),XB(f)
- B(f);N_GUARD::QAB(F),XB(f)
- S(g);N_GUARD::QAB1(F),XS(g)
- S(g);N_GUARD::QAB1(F)
- P(e);N_GUARD::QAR1(F)
- Refutation
- P(b);
- Try
- Q(F);
- Threat
- DUALS(4)
- Vars
- P(a);::QAR1(F),XP(b)
- B(d);::QAR1(F),XP(b)
- Refutation
- P(e);XQ(F)
- Try
- Q(F);XB(d)
- Threat
- QAB(F),XB(f)
- Vars
- P(a);OGATEB::QAB(F)
- B(f);N_GUARD::QAB(F),XB(f)
- B(f);N_GUARD::QAB(F)
- Refutation
- B(f);
- Try
- Actual
- Q(F);
- Vars
- B(d);OGATE,P_SPINB(d),XP(E)::QAR1(F),XB(d)
- P(a);OGATEB::QAB(F)
- B(d);OGATE::QAR(F)+P(E),XB(d)
- B(d);N_GUARD::QAR(F)+P(E)
- B(f);N_GUARD::QAB1(F),XB(f)
- B(f);N_GUARD::QAB(F),XB(f)
- S(g);N_GUARD::QAR2(F)
- S(g);N_GUARD::QAR2(F),XS(g)
- P(b);N_GUARD::S(C)
- P(e);N_GUARD::S(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).