MESON Chess Problem Database
Problem Display
PID: 231176 (1B2R2n/Pp1kPP2/3n1PP1/2r1Q2K/N5N1/2p4B/b3R1r1/6b1 w - - 0 1)
Cristoffanini, Guido
L'Echiquier, 1927
#2
13 + 9
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rc4
- 2.Qxd6#
- 1...Rxe5+
- 2.Sxe5#
- 1...Rc6
- 2.Rd8#
- 1...Rc8
- 2.Qxd6#
- 1...Bd5
- 2.Qxd6#
- 1...Rc4
- Tries
- 1.Qxc5?
- threat
- 2.Sb6#
- 2.Se5#
- 2.Rd8#
- 2.Qxd6#
- 2.Qc7#
- 1...Rxe2
- 2.Se5#
- 2.Qxd6#
- 1...Rxg4
- 2.Sb6#
- 2.Rd8#
- 2.Qxd6#
- 2.Qc7#
- 1...Bxc5
- 2.Se5#
- 1...Bxf7
- 2.Rd8#
- 1...Sdxf7
- 2.Qb5#
- 2.Qc8#
- 1...Sxe8
- 2.Sb6#
- 2.Se5#
- 2.f8S#
- 1...Be3
- 2.Se5#
- 2.Qxd6#
- 1...Se4
- 2.Se5#
- 2.Qc8#
- 1...Bh2
- 2.Sb6#
- 2.Se5#
- 2.Rd8#
- 2.Qc7#
- 1...Sc4
- 2.Se5#
- 2.Rd8#
- 2.Qb5#
- 2.Qc7#
- 2.Qc8#
- 1...Sb5
- 2.Sb6#
- 2.Se5#
- 2.Rd8#
- 2.Qxb5#
- 2.Qc8#
- 1...Sf5
- 2.Sb6#
- 2.Rd8#
- 2.Qb5#
- 2.Qc7#
- 2.Qc8#
- 1...Sc8
- 2.Se5#
- 2.Rd8#
- 2.Qb5#
- 2.Qc7#
- 2.Qxc8#
- 1...b6
- 2.Sxb6#
- 2.Se5#
- 2.Rd8#
- 2.Qxd6#
- 2.Qc7#
- 1...Shxf7!
- threat
- 1.Qd5?
- threat
- 2.Sb6#
- 2.Se5#
- 2.Rd8#
- 1...Rxd5+
- 2.Se5#
- 1...Rxg4
- 2.Sb6#
- 2.Bxg4#
- 2.Rd8#
- 1...Bxd5
- 2.Se5#
- 1...Rc4
- 2.Se5#
- 2.Rd8#
- 2.Qxd6#
- 1...Ra5
- 2.Se5#
- 2.Rd8#
- 1...Rb5
- 2.Se5#
- 2.Rd8#
- 1...Rc6
- 2.Se5#
- 2.Rd8#
- 1...Rc7
- 2.Se5#
- 2.Rd8#
- 1...Rc8
- 2.Se5#
- 2.Qxd6#
- 1...b6
- 2.Sxb6#
- 2.Se5#
- 2.Rd8#
- 1...Sxf7!
- threat
- 1.Qxc5?
- Keys
- 1.Rc8!
- threat
- 2.Sb6#
- 1...Rxe5+
- 2.Sxe5#
- 1...Kxc8
- 2.Sb6#
- 1...Rxc8
- 2.Qxd6#
- 1...Sxc8
- 2.e8Q#
- 1...Rc7
- 2.Rxc7#
- 1...Rc4
- 2.Qe6#
- 1...Ra5
- 2.Rc7#
- 1...Rb5
- 2.Rc7#
- 1...Rd5
- 2.Rc7#
- 1...Rc6
- 2.Rd8#
- 1...Sc4
- 2.e8Q#
- 1...b6
- 2.Sxb6#
- threat
- 1.Rc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 1
- Sets
- R(e);N_PINQ(E)::QAR1(E),XS(f)
- R(e);CHECK,XQ(E)::B(B)+S(D),DCHECK,XR(e)
- R(e);N_PINQ(E),SBLOCK::R1(M)
- B(b);N_PINQ(E)::QAR1(E),XS(f)
- Tries
- Try
- Q(E);N_SPINQ(E),XR(e)
- Threat
- DUALS(5)
- Vars
- B(a);XQ(E)::B(B)+S(D),DCHECK
- B(b);P_PINP(H),XP(K)::R1(M)
- Refutation
- S(i);XP(K)
- Try
- Q(E);P_PINS(f)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,N_SPINS(f),XQ(E)::B(B)+S(D),DCHECK
- B(b);N_SPINS(f),XQ(E)::B(B)+S(D),DCHECK
- Refutation
- S(i);XP(K)
- Try
- Actual
- R(M);
- Threat
- S(C)
- Vars
- R(e);CHECK,XQ(E)::B(B)+S(D),DCHECK,XR(e)
- K(h);S_FLIGHT,XR(M)::S(C)
- R(e);N_PINQ(E),SBLOCK,XR(M)::QAR1(E),XS(f)
- S(f);N_GUARD,XR(M)::P=Q
- R(e);N_GUARD,N_PINQ(E)::R1(M),XR(e)
- R(e);N_PINQ(E)::QAB1(E)
- R(e);N_GUARD::R1(M)
- R(e);N_PINQ(E),SBLOCK::R1(M)
- S(f);N_GUARD::P=Q
- P(g);::S(C),XP(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).