MESON Chess Problem Database
Problem Display
PID: 268388 (4B3/N7/8/PR5Q/kB1q2bR/p7/P5P1/rN4bK w - - 0 1)
Chicco, Adriano
Shakhmaty v SSSR, 1932
#2
11 + 6
| 15601 | Albrecht-Leiss-Degener Collection | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Qf2
- 2.Sc3#
- 1...Qc3
- 2.Sxc3#
- 1...Qb6
- 2.Sc3#
- 1...Qxa7
- 2.Sc3#
- 1...Qd1
- 2.Sc3#
- 1...Qe4
- 2.Sc3#
- 1...Qf4
- 2.Sc3#
- 1...Qd5
- 2.Sc3#
- 1...Qd6
- 2.Sc3#
- 1...Qd7
- 2.Sc3#
- 1...Qd8
- 2.Sc3#
- 1...Qf2
- Tries
- 1.Be1?
- threat
- 2.Rb4#
- 1...Bxh5
- 2.Sc3#
- 2.Rbxh5#
- 1...Qc3
- 2.Sxc3#
- 1...Qc5
- 2.Rxc5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb4
- 2.Rxb4#
- 1...Qd5
- 2.Sc3#
- 2.Rxd5#
- 1...Bf5
- 2.Sc3#
- 2.Rxf5#
- 1...Bd7
- 2.Sc3#
- 2.Qd1#
- 1...Qd2!
- threat
- 1.Bd2?
- threat
- 2.Rb4#
- 1...Bxh5
- 2.Sc3#
- 2.Rbxh5#
- 1...Qc3
- 2.Sxc3#
- 1...Qc5
- 2.Rxc5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb4
- 2.Rxb4#
- 1...Qd5
- 2.Sc3#
- 2.Rxd5#
- 1...Bf5
- 2.Sc3#
- 2.Rxf5#
- 1...Bd7
- 2.Sc3#
- 2.Qd1#
- 1...Qxd2!
- threat
- 1.Bxa3?
- threat
- 2.Rb4#
- 1...Bxh5
- 2.Rbxh5#
- 1...Qc5
- 2.Rxc5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb4
- 2.Rxb4#
- 1...Qd5
- 2.Rxd5#
- 1...Bf5
- 2.Rxf5#
- 1...Bd7
- 2.Qd1#
- 1...Rxb1!
- threat
- 1.Bd6?
- threat
- 2.Rb4#
- 2.Rf5#
- 1...Qxa7
- 2.Sc3#
- 2.Rb4#
- 2.Rb7#
- 1...Qxd6
- 2.Sc3#
- 1...Rxb1
- 2.Rb4#
- 1...Rxa2
- 2.Rb4#
- 1...Bxh5
- 2.Sc3#
- 2.Rbxh5#
- 1...Qb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 1...Qc3
- 2.Sxc3#
- 2.Rb4#
- 1...Qe3
- 2.Rb4#
- 2.Re5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb6
- 2.Sc3#
- 2.Rb4#
- 2.Rxb6#
- 1...Qg7
- 2.Rb4#
- 1...Qh8
- 2.Rb4#
- 1...Qd3
- 2.Rb4#
- 1...Qb4
- 2.Rxb4#
- 1...Qc4
- 2.Rb4#
- 1...Qe4
- 2.Sc3#
- 2.Rb4#
- 1...Qd5
- 2.Sc3#
- 2.Rxd5#
- 1...Be2
- 2.Sc3#
- 2.Rb4#
- 1...Bf3
- 2.Sc3#
- 2.Rb4#
- 2.Rd5#
- 1...Bf5
- 2.Sc3#
- 2.Rxf5#
- 1...Be6
- 2.Sc3#
- 2.Rb4#
- 1...Bd7
- 2.Sc3#
- 2.Qd1#
- 1...Bc8
- 2.Sc3#
- 2.Rb4#
- 2.Qd1#
- 1...Qc5!
- threat
- 1.Be7?
- threat
- 2.Rb4#
- 1...Bxh5
- 2.Sc3#
- 2.Rbxh5#
- 1...Qe5
- 2.Rd5#
- 2.Rxe5#
- 1...Qb4
- 2.Rxb4#
- 1...Qd5
- 2.Sc3#
- 2.Rxd5#
- 1...Qd6
- 2.Sc3#
- 1...Bf5
- 2.Sc3#
- 2.Rxf5#
- 1...Bd7
- 2.Sc3#
- 2.Qd1#
- 1...Qc5!
- threat
- 1.Bf8?
- threat
- 2.Rb4#
- 1...Bxh5
- 2.Sc3#
- 2.Rbxh5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb4
- 2.Rxb4#
- 1...Qd5
- 2.Sc3#
- 2.Rxd5#
- 1...Qd6
- 2.Sc3#
- 1...Bf5
- 2.Sc3#
- 2.Rxf5#
- 1...Bd7
- 2.Sc3#
- 2.Qd1#
- 1...Qc5!
- threat
- 1.Rb6+?
- 1...Qd7
- 2.Sc3#
- 1...Bd7!
- 1...Qd7
- 1.Rb7+?
- 1...Qd7
- 2.Sc3#
- 1...Bd7!
- 1...Qd7
- 1.Rb8+?
- 1...Qd7
- 2.Sc3#
- 1...Bd7!
- 1...Qd7
- 1.Be1?
- Keys
- 1.Bc3!
- threat
- 2.Rb4#
- 1...Qxc3
- 2.Sxc3#
- 1...Bxh5
- 2.Rbxh5#
- 1...Qc5
- 2.Rxc5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb4
- 2.Rxb4#
- 1...Qd5
- 2.Rxd5#
- 1...Bf5
- 2.Rxf5#
- 1...Bd7
- 2.Qd1#
- threat
- 1.Bc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 9
- Sets
- Q(e);N_GUARD::S(A)
- Q(e);N_GUARD::S(A),XQ(e)
- Q(e);N_GUARD,XS(J)::S(A)
- Q(e);N_GUARD,P_PINP(D)::S(A)
- Tries
- Try
- B(E);
- Threat
- B(K)+R(H),DCHECK
- Vars
- Q(e);N_GUARD,P_SPINB(f)::S(A),XQ(e)
- Q(e);N_GUARD,P_SPINB(f)::B(K)+R(H),XQ(e)
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Refutation
- Q(e);P_SPINB(f)
- Try
- B(E);
- Threat
- B(K)+R(H),DCHECK
- Vars
- Q(e);N_GUARD,P_SPINB(f)::S(A),XQ(e)
- Q(e);N_GUARD,P_SPINB(f)::B(K)+R(H),XQ(e)
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Refutation
- Q(e);P_SPINB(f),XB(E)
- Try
- B(E);XP(c)
- Threat
- B(K)+R(H),DCHECK
- Vars
- B(f);OGATE,P_SPINQ(e),XQ(I)::B(K)+R(H),XB(f)
- Q(e);N_GUARD,P_SPINB(f)::B(K)+R(H),XQ(e)
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Q(e);P_PINP(D),P_SPINB(f)::B(K)+R(H),XQ(e)
- B(f);P_SPINQ(e)::B(K)+R(H),XB(f)
- B(f);OGATE,P_SPINQ(e)::QAB(I)
- Refutation
- R(a);XS(A)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- Q(e);N_GUARD,P_SPINB(f),XB(E)::S(A)
- R(a);XS(A)::B(K)+R(H),DCHECK
- R(a);XP(C)::B(K)+R(H),DCHECK
- Q(e);P_SPINB(f)::B(K)+R(H),XQ(e)
- Q(e);P_SPINB(f)::B(K)+R(H),DCHECK
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Q(e);::B(K)+R(H),DCHECK
- Refutation
- Q(e);P_SPINB(f)
- Try
- B(E);
- Threat
- B(K)+R(H),DCHECK
- Vars
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Q(e);N_GUARD,P_SPINB(f)::S(A)
- Refutation
- Q(e);P_SPINB(f)
- Try
- B(E);
- Threat
- B(K)+R(H),DCHECK
- Vars
- Q(e);N_GUARD,P_SPINB(f)::B(K)+R(H),XQ(e)
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Q(e);N_GUARD,P_SPINB(f)::S(A)
- Refutation
- Q(e);P_SPINB(f)
- Try
- R(H);CHECK
- Vars
- Q(e);P_SPINQ(e)::S(A)
- Refutation
- B(f);P_SPINB(f)
- Try
- R(H);CHECK
- Vars
- Q(e);P_SPINQ(e)::S(A)
- Refutation
- B(f);P_SPINB(f)
- Try
- R(H);CHECK
- Vars
- Q(e);P_SPINQ(e)::S(A)
- Refutation
- B(f);P_SPINB(f)
- Try
- Actual
- B(E);
- Threat
- B(K)+R(H),DCHECK
- Vars
- Q(e);P_SPINB(f),XB(E)::S(A),XQ(e)
- B(f);OGATE,P_SPINQ(e),XQ(I)::B(K)+R(H),XB(f)
- Q(e);N_GUARD,P_SPINB(f)::B(K)+R(H),XQ(e)
- Q(e);::B(K)+R(H),DCHECK,XQ(e)
- Q(e);P_PINP(D),P_SPINB(f)::B(K)+R(H),XQ(e)
- B(f);P_SPINQ(e)::B(K)+R(H),XB(f)
- B(f);OGATE,P_SPINQ(e)::QAB(I)
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).