MESON Chess Problem Database
Problem Display
PID: 204304 (5QB1/B5P1/qp1N3K/2b1p3/3kN1bR/pR1P4/3P2r1/8 w - - 0 1)
Cristoffanini, Guido
Il Secolo, 1925
#2
11 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qb5
- 2.Sxb5#
- 1...Qb7
- 2.Sb5#
- 1...Qc8
- 2.Sb5#
- 1...Qxa7
- 2.Sb5#
- 1...Rg1
- 2.Qf2#
- 1...Rf2
- 2.Qxf2#
- 1...Bd1
- 2.Sf5#
- 1...Be2
- 2.Sf5#
- 1...Bf3
- 2.Sf5#
- 1...Bf5
- 2.Sxf5#
- 1...Bh5
- 2.Sf5#
- 1...Bxd6
- 2.Qxd6#
- 1...b5
- 2.Bxc5#
- 1...Qb5
- Tries
- 1.Sg3?
- threat
- 2.Sgf5#
- 2.Sdf5#
- 1...Rxg3
- 2.Sf5#
- 1...Bxd6
- 2.Qxd6#
- 1...Bb4
- 2.Sdf5#
- 1...e4
- 2.Qf6#
- 1...Qc8
- 2.Sb5#
- 1...Rf2
- 2.Qxf2#
- 1...b5
- 2.Sf5#
- 1...Qxd3!
- threat
- 1.Sg5?
- threat
- 2.Sf3#
- 2.Sf5#
- 1...Rxd2
- 2.Sf5#
- 1...Bxd6
- 2.Qxd6#
- 1...Bb4
- 2.Sf5#
- 1...e4
- 2.Qf6#
- 1...Qb7
- 2.Sb5#
- 2.Sf5#
- 1...Qc8
- 2.Sf3#
- 2.Sb5#
- 1...Rf2
- 2.Qxf2#
- 1...Rg3
- 2.Sf5#
- 1...b5
- 2.Sf3#
- 1...Qxd3!
- threat
- 1.Rxg4?
- threat
- 2.Sf5#
- 1...Bxd6
- 2.Qxd6#
- 1...Qc8
- 2.Sb5#
- 1...Rf2
- 2.Qxf2#
- 1...b5
- 2.Bxc5#
- 1...Rh2+!
- threat
- 1.Qd8?
- threat
- 2.Sb5#
- 2.Sf5#
- 1...Rxd2
- 2.Sf5#
- 1...Bxd6
- 2.Qxd6#
- 1...Qb5
- 2.Sxb5#
- 2.Sf5#
- 1...Bf5
- 2.Sb5#
- 2.Sxf5#
- 1...Bd7
- 2.Sf5#
- 1...b5
- 2.Bxc5#
- 1...Qxd3!
- threat
- 1.Sg3?
- Keys
- 1.Sf2!
- threat
- 2.Sf5#
- 1...Qxd3
- 2.Rxd3#
- 1...Rxf2
- 2.Qxf2#
- 1...Bxd6
- 2.Qxd6#
- 1...e4
- 2.Qf6#
- 1...Qc8
- 2.Sb5#
- 1...b5
- 2.Rb4#
- threat
- 1.Sf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- Q(g);N_GUARD::S(F),XQ(g)
- Q(g);N_GUARD::S(F)
- Q(g);N_GUARD,XB(H)::S(F)
- R(a);N_GUARD::QAB(J)
- R(a);N_GUARD::QAB(J),XR(a)
- B(d);N_GUARD::S(F)
- B(d);N_GUARD::S(F),XB(d)
- B(e);OGATE,P_SPINP(h),XS(F)::QAR2(J),XB(e)
- P(h);OGATE,P_PINS(F),P_SPINB(e)::B(H),XB(e)
- Tries
- Try
- S(D);P_PINB(d)
- Threat
- DUALS(2)
- Vars
- R(a);XS(D)::S(F)
- B(e);OGATE,P_SPINP(h),XS(F)::QAR2(J),XB(e)
- B(e);P_SPINP(h)::S(F)
- P(f);N_SPINB(d),OGATEB::QAB(J)
- Q(g);N_GUARD::S(F)
- R(a);N_GUARD::QAB(J),XR(a)
- P(h);P_PINS(F)::S(D)
- Refutation
- Q(g);XP(C)
- Try
- S(D);P_PINB(d)
- Threat
- DUALS(2)
- Vars
- R(a);XP(A)::S(F)
- B(e);OGATE,P_SPINP(h),XS(F)::QAR2(J),XB(e)
- B(e);P_SPINP(h)::S(F)
- P(f);N_SPINB(d),OGATEB::QAB(J)
- R(a);N_GUARD::QAB(J),XR(a)
- R(a);::S(F)
- P(h);P_PINS(F)::S(D)
- Refutation
- Q(g);XP(C)
- Try
- R(E);XB(d)
- Threat
- S(F)
- Vars
- B(e);OGATE,P_SPINP(h),XS(F)::QAR2(J),XB(e)
- Q(g);N_GUARD::S(F)
- R(a);N_GUARD::QAB(J),XR(a)
- P(h);OGATE,P_PINS(F),P_SPINB(e)::B(H),XB(e)
- Refutation
- R(a);CHECK
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(a);XP(A)::QAR(J)+S(F),DCHECK
- B(e);OGATE,P_SPINB(e),P_SPINP(h),XS(F)::QAR2(J),XB(e)
- B(d);::S(F)
- P(h);OGATE,P_PINS(F),P_SPINB(e)::B(H),XB(e)
- Refutation
- Q(g);XP(C)
- Try
- Actual
- S(D);P_PINB(d)
- Threat
- S(F)
- Vars
- Q(g);OGATE,XP(C)::R1(B),XQ(g)
- R(a);OGATE,XS(D)::QAB(J),XR(a)
- B(e);OGATE,P_SPINP(h),XS(F)::QAR2(J),XB(e)
- P(f);N_SPINB(d),OGATEB::QAB(J)
- Q(g);N_GUARD::S(F)
- P(h);P_PINS(F),S_CUTB(e),S_CUTQ(g)::R(B)
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).