MESON Chess Problem Database
Problem Display
PID: 71721 (2QN2B1/K7/8/p1Pp1pp1/2nkn3/3p2P1/b6p/2R1R1bq w - - 0 1)
Cristoffanini, Guido
L'Echiquier, 1938
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Sb2
- 2.Sc6#
- 1...Scd2
- 2.Sc6#
- 1...Sa3
- 2.Sc6#
- 1...Se3
- 2.Sc6#
- 1...Se5
- 2.Se6#
- 1...Sb6
- 2.Sc6#
- 1...Scd6
- 2.Sc6#
- 1...Sed2
- 2.Se6#
- 1...Sf2
- 2.Se6#
- 1...Sc3
- 2.Se6#
- 1...Sxg3
- 2.Se6#
- 1...Sxc5
- 2.Sc6#
- 1...Sed6
- 2.Se6#
- 1...Sf6
- 2.Se6#
- 1...Sb2
- Tries
- 1.Qxf5?
- threat
- 2.Se6#
- 2.Qxd5#
- 1...Sxg3
- 2.Se6#
- 1...Sxc5
- 2.Sc6#
- 1...d2
- 2.Qxd5#
- 1...Sb2
- 2.Sc6#
- 2.Se6#
- 1...Scd2
- 2.Sc6#
- 2.Se6#
- 1...Sa3
- 2.Sc6#
- 2.Se6#
- 1...Se3
- 2.Sc6#
- 2.Se6#
- 1...Se5
- 2.Se6#
- 1...Sb6
- 2.Sc6#
- 2.Se6#
- 1...Scd6
- 2.Sc6#
- 2.Se6#
- 1...Sed2
- 2.Se6#
- 1...Sf2
- 2.Se6#
- 1...Sc3
- 2.Se6#
- 1...Sed6
- 2.Se6#
- 1...Sf6
- 2.Se6#
- 1...Kxc5!
- threat
- 1.Qd7?
- threat
- 2.Qxd5#
- 1...Ke5
- 2.Qg7#
- 1...Sxg3
- 2.Se6#
- 1...Sxc5
- 2.Sc6#
- 1...Sb2
- 2.Sc6#
- 1...Scd2
- 2.Sc6#
- 1...Sa3
- 2.Sc6#
- 1...Se3
- 2.Sc6#
- 1...Se5
- 2.Se6#
- 1...Sb6
- 2.Sc6#
- 1...Scd6
- 2.Sc6#
- 1...Sed2
- 2.Se6#
- 1...Sf2
- 2.Se6#
- 1...Sc3
- 2.Se6#
- 1...Sed6
- 2.Se6#
- 1...Sf6
- 2.Se6#
- 1...Kxc5!
- threat
- 1.Qc7?
- threat
- 2.Se6#
- 1...Sxc5
- 2.Sc6#
- 1...Scd6
- 2.Sc6#
- 1...d2!
- threat
- 1.Qb8?
- threat
- 2.Se6#
- 1...Kxc5
- 2.Qb6#
- 1...Sxc5
- 2.Sc6#
- 1...Scd6
- 2.Sc6#
- 1...d2!
- threat
- 1.Qxf5?
- Keys
- 1.Qb7!
- threat
- 2.Qxd5#
- 1...Kxc5
- 2.Qb6#
- 1...Ke5
- 2.Qg7#
- 1...Sxg3
- 2.Se6#
- 1...Sxc5
- 2.Sc6#
- 1...Sb2
- 2.Sc6#
- 1...Scd2
- 2.Sc6#
- 1...Sa3
- 2.Sc6#
- 1...Se3
- 2.Sc6#
- 1...Se5
- 2.Se6#
- 1...Sb6
- 2.Sc6#
- 1...Scd6
- 2.Sc6#
- 1...Sed2
- 2.Se6#
- 1...Sf2
- 2.Se6#
- 1...Sc3
- 2.Se6#
- 1...Sed6
- 2.Se6#
- 1...Sf6
- 2.Se6#
- threat
- 1.Qb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(f);::S(G)
- S(f);SBLOCK::S(G)
- S(h);::S(G)
- S(h);XP(C)::S(G)
- S(h);SBLOCK,XP(D)::S(G)
- Tries
- Try
- Q(F);XP(k)
- Threat
- DUALS(2)
- Vars
- S(h);XP(C)::S(G)
- S(h);SBLOCK,XP(D)::S(G)
- P(e);::QAR1(F),XP(j)
- S(f);::S(G)
- S(h);::S(G)
- Refutation
- K(g);P_SPINP(j),P_SPINS(f),S_FLIGHT,XP(D)
- Try
- Q(F);P_PINP(j)
- Threat
- QAR1(F),XP(j)
- Vars
- K(g);N_SPINP(j),P_PINP(D),P_SPINS(h),S_FLIGHT::QAB(F)
- S(h);XP(C)::S(G)
- S(h);SBLOCK,XP(D)::S(G)
- S(f);::S(G)
- S(f);SBLOCK::S(G)
- S(f);N_SPINP(j)::S(G)
- S(h);::S(G)
- S(h);N_SPINP(j)::S(G)
- Refutation
- K(g);N_SPINP(j),P_SPINS(f),S_FLIGHT,XP(D)
- Try
- Q(F);
- Threat
- S(G)
- Vars
- S(h);SBLOCK,XP(D)::S(G)
- S(f);::S(G)
- Refutation
- P(e);
- Try
- Q(F);
- Threat
- S(G)
- Vars
- K(g);OGATEB,P_SPINS(f),S_FLIGHT,XP(D)::QAB1(F)
- S(h);SBLOCK,XP(D)::S(G)
- S(f);::S(G)
- Refutation
- P(e);
- Try
- Actual
- Q(F);
- Threat
- QAR1(F),XP(j)
- Vars
- K(g);OGATEB,P_SPINS(f),S_FLIGHT,XP(D)::QAB1(F)
- K(g);P_PINP(D),P_SPINS(h),S_FLIGHT::QAB(F)
- S(h);XP(C)::S(G)
- S(h);SBLOCK,XP(D)::S(G)
- S(f);::S(G)
- S(f);SBLOCK::S(G)
- S(h);::S(G)
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).