MESON Chess Problem Database
Problem Display
PID: 91844 (1Q2n3/Bp6/k3N2p/7R/3K4/6p1/5nR1/8 w - - 0 1)
Cristoffanini, Guido
Wiener Schachzeitung, 1929
#2
6 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Ra2#
- 1...Sh1
- 2.Ra2#
- 1...Sd3
- 2.Ra2#
- 1...Sh3
- 2.Ra2#
- 1...Se4
- 2.Ra2#
- 1...Sg4
- 2.Ra2#
- 1...Sd6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b5
- 2.Qb6#
- 1...b6
- 2.Qxb6#
- 1...Sd1
- Tries
- 1.Sd8?
- threat
- 2.Qxb7#
- 1...b5
- 2.Qb6#
- 1...b6
- 2.Qxb6#
- 2.Qb7#
- 1...Sd6!
- threat
- 1.Rb5?
- threat
- 2.Qxb7#
- 1...Sd6
- 2.Sc7#
- 1...b6
- 2.Qxb6#
- 1...Kxb5!
- threat
- 1.Rc5?
- 1...b5
- 2.Qb6#
- 1...Sd6
- 2.Sc7#
- 1...Sd1
- 2.Ra2#
- 1...Sh1
- 2.Ra2#
- 1...Sd3
- 2.Ra2#
- 1...Sh3
- 2.Ra2#
- 1...Se4
- 2.Ra2#
- 1...Sg4
- 2.Ra2#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b6
- 2.Qxb6#
- 1...h5!
- 1...b5
- 1.Rd5?
- 1...b5
- 2.Qb6#
- 1...Sd6
- 2.Sc7#
- 1...Sd1
- 2.Ra2#
- 1...Sh1
- 2.Ra2#
- 1...Sd3
- 2.Ra2#
- 1...Sh3
- 2.Ra2#
- 1...Se4
- 2.Ra2#
- 1...Sg4
- 2.Ra2#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b6
- 2.Qxb6#
- 1...h5!
- 1...b5
- 1.Re5?
- 1...b5
- 2.Qb6#
- 1...Sd6
- 2.Sc7#
- 1...Sd1
- 2.Ra2#
- 1...Sh1
- 2.Ra2#
- 1...Sd3
- 2.Ra2#
- 1...Sh3
- 2.Ra2#
- 1...Se4
- 2.Ra2#
- 1...Sg4
- 2.Ra2#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b6
- 2.Qxb6#
- 1...h5!
- 1...b5
- 1.Rf5?
- 1...b5
- 2.Qb6#
- 1...Sd6
- 2.Sc7#
- 1...Sd1
- 2.Ra2#
- 1...Sh1
- 2.Ra2#
- 1...Sd3
- 2.Ra2#
- 1...Sh3
- 2.Ra2#
- 1...Se4
- 2.Ra2#
- 1...Sg4
- 2.Ra2#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b6
- 2.Qxb6#
- 1...h5!
- 1...b5
- 1.Qd6+?
- 1...Kxa7
- 2.Ra5#
- 1...b6
- 2.Qxb6#
- 1...Sxd6!
- 1...Kxa7
- 1.Qc7?
- threat
- 2.Ra5#
- 2.Qa5#
- 2.Qb6#
- 1...Kxa7
- 2.Ra5#
- 1...b5
- 2.Sc5#
- 2.Qb6#
- 1...b6
- 2.Qxb6#
- 1...Sxc7!
- threat
- 1.Qd8?
- threat
- 2.Ra5#
- 2.Qa5#
- 2.Qb6#
- 1...Kxa7
- 2.Ra5#
- 1...b5
- 2.Qb6#
- 1...b6
- 2.Qxb6#
- 1...Sc7!
- threat
- 1.Sd8?
- Keys
- 1.Qa8!
- 1...b5
- 2.Bc5#
- 1...Sd1
- 2.Ra2#
- 1...Sh1
- 2.Ra2#
- 1...Sd3
- 2.Ra2#
- 1...Sh3
- 2.Ra2#
- 1...Se4
- 2.Ra2#
- 1...Sg4
- 2.Ra2#
- 1...Sd6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b6
- 2.Bb8#
- 1...b5
- 1.Qa8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(a);OGATE::R(A)
- S(f);N_GUARD::S(D)
- S(f);N_GUARD::S(D),XS(f)
- P(e);OGATE::QAR1(F)
- P(e);OGATE::QAR1(F),XP(e)
- Tries
- Try
- S(D);
- Threat
- QAB1(F),XP(e)
- Vars
- P(e);OGATE::QAR1(F)
- Refutation
- S(f);
- Try
- R(C);
- Threat
- QAB1(F),XP(e)
- Vars
- S(f);N_GUARD::S(D)
- P(e);OGATE::QAR1(F),XP(e)
- Refutation
- K(c);P_SPINP(e),S_FLIGHT,XR(C)
- Try
- R(C);
- Vars
- P(e);OGATE::QAR1(F)
- S(f);N_GUARD::S(D)
- S(a);OGATE::R(A)
- S(f);N_GUARD::S(D),XS(f)
- P(e);OGATE::QAR1(F),XP(e)
- Refutation
- P(d);
- Try
- R(C);
- Vars
- P(e);OGATE::QAR1(F)
- S(f);N_GUARD::S(D)
- S(a);OGATE::R(A)
- S(f);N_GUARD::S(D),XS(f)
- P(e);OGATE::QAR1(F),XP(e)
- Refutation
- P(d);
- Try
- R(C);
- Vars
- P(e);OGATE::QAR1(F)
- S(f);N_GUARD::S(D)
- S(a);OGATE::R(A)
- S(f);N_GUARD::S(D),XS(f)
- P(e);OGATE::QAR1(F),XP(e)
- Refutation
- P(d);
- Try
- R(C);
- Vars
- P(e);OGATE::QAR1(F)
- S(f);N_GUARD::S(D)
- S(a);OGATE::R(A)
- S(f);N_GUARD::S(D),XS(f)
- P(e);OGATE::QAR1(F),XP(e)
- Refutation
- P(d);
- Try
- Q(F);CHECK
- Vars
- K(c);P-FLIGHT,XB(E)::R(C)
- P(e);P_SPINP(e)::QAR1(F),XP(e)
- Refutation
- S(f);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- K(c);P-FLIGHT,P_SPINP(e),XB(E)::R(C)
- P(e);::QAR1(F),XP(e)
- Refutation
- S(f);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- K(c);P-FLIGHT,XB(E)::R(C)
- P(e);::QAR1(F)
- P(e);::QAR1(F),XP(e)
- Refutation
- S(f);
- Try
- Actual
- Q(F);
- Vars
- P(e);SBLOCK::QAR(F)+B(E)
- S(a);OGATE::R(A)
- S(f);N_GUARD::S(D)
- S(f);N_GUARD::S(D),XS(f)
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).