MESON Chess Problem Database
Problem Display
PID: 246609 (8/2N1prr1/1n5b/1R1p4/2Bk3N/q6b/PPP1QP2/3KR1B1 w - - 0 1)
Castellari, Umberto
El Ajedrez Espanol, 1952
#2
12 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxb2
- 2.Qd3#
- 1...Qb4
- 2.Qd3#
- 1...Qc5
- 2.Qd3#
- 2.c3#
- 1...Qd6
- 2.Qd3#
- 2.c3#
- 1...Qxa2
- 2.Qd3#
- 2.c3#
- 1...Qd3+
- 2.Qxd3#
- 1...Qa4
- 2.Qd3#
- 1...Qa5
- 2.Qd3#
- 1...Qa6
- 2.Qd3#
- 2.c3#
- 1...Qa7
- 2.Qd3#
- 2.c3#
- 1...Qa8
- 2.Qd3#
- 2.c3#
- 1...Rf5
- 2.Se6#
- 1...Rg4
- 2.Se6#
- 1...Bf1
- 2.Se6#
- 1...Bg2
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sa4
- 2.Rxd5#
- 1...Sxc4
- 2.Rxd5#
- 1...Sd7
- 2.Rxd5#
- 1...Sa8
- 2.Rxd5#
- 1...Sc8
- 2.Rxd5#
- 1...dxc4
- 2.Qe4#
- 2.Qe5#
- 1...Qxb2
- Tries
- 1.Sf5+?
- 1...Rxf5
- 2.Se6#
- 1...Bxf5!
- 1...Rxf5
- 1.Bb3?
- threat
- 2.Qd3#
- 2.Qe5#
- 2.c3#
- 1...Qxb2
- 2.Qd3#
- 2.Qe5#
- 1...Be3
- 2.Qxe3#
- 1...Qb4
- 2.Qd3#
- 2.Qe5#
- 1...Qc5
- 2.Qd3#
- 2.Qe5#
- 1...Qd6
- 2.Qd3#
- 2.c3#
- 1...Qa5
- 2.Qd3#
- 2.Qe5#
- 1...Rf3
- 2.Sxf3#
- 2.Qe5#
- 1...Rf5
- 2.Se6#
- 2.Qd3#
- 2.c3#
- 1...Rg3
- 2.Qe5#
- 1...Rg5
- 2.Qd3#
- 2.Qd2#
- 2.Qe3#
- 2.c3#
- 1...Bf1
- 2.Se6#
- 2.Qe5#
- 2.c3#
- 1...Bg4
- 2.c3#
- 2.f4#
- 1...Bf5
- 2.Sf3#
- 2.Qe5#
- 2.c3#
- 1...Bd2
- 2.Qd3#
- 2.Qxd2#
- 2.Qe5#
- 1...Bf4
- 2.Sf3#
- 2.Qd3#
- 2.c3#
- 1...Sa4
- 2.Rxd5#
- 2.Qd3#
- 2.Qe5#
- 1...Sc4
- 2.Rxd5#
- 2.Qd3#
- 2.c3#
- 1...Sd7
- 2.Rxd5#
- 2.Qd3#
- 2.c3#
- 1...e5
- 2.Qd3#
- 2.Qxe5#
- 2.c3#
- 1...Qxb3!
- threat
- 1.f4+?
- 1...Qe3
- 2.Qd3#
- 1...Rxg1!
- 1...Qe3
- 1.Sf5+?
- Keys
- 1.Bd3!
- threat
- 2.Qe5#
- 1...Qxd3+
- 2.Qxd3#
- 1...Be3
- 2.Qxe3#
- 1...Qd6
- 2.c3#
- 1...Rf5
- 2.Se6#
- 1...Rg5
- 2.Qe3#
- 1...Bg4
- 2.f4#
- 1...Bf4
- 2.Sf3#
- 1...Sc4
- 2.Rxd5#
- 1...Sd7
- 2.Rxd5#
- 1...e5
- 2.Qxe5#
- threat
- 1.Bd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 11
- Sets
- Q(a);N_GUARD,XP(E)::QAR1(G)
- Q(a);N_GUARD::QAR1(G)
- Q(a);CHECK,N_GUARD::QAR1(G),XQ(a)
- Q(a);N_GUARD,P_PINP(F)::QAR1(G)
- R(h);S_CUTB(b)::S(L)
- R(i);S_CUTB(b)::S(L)
- B(b);N_GUARD::S(L)
- B(b);N_GUARD::S(L),XB(b)
- S(e);N_GUARD::R1(K),XP(d)
- S(e);N_GUARD,XB(I)::R1(K),XP(d)
- Tries
- Try
- S(J);CHECK
- Vars
- R(h);XS(J)::S(L)
- Refutation
- B(b);XS(J)
- Try
- B(I);
- Threat
- DUALS(3)
- Vars
- B(f);N_GUARD::QAB1(G),XB(f)
- R(i);::QAB1(G)
- Refutation
- Q(a);P_PINP(F),XB(I)
- Try
- P(H);CHECK
- Vars
- Q(a);P_SPINQ(a)::QAR1(G)
- Refutation
- R(i);P_PINR(B),XB(C)
- Try
- Actual
- B(I);
- Threat
- QAB1(G)
- Vars
- Q(a);CHECK,OGATE,XB(I)::QAR1(G),XQ(a)
- B(f);N_GUARD::QAB1(G),XB(f)
- Q(a);N_GUARD::P(F)
- R(h);S_CUTB(b)::S(L)
- R(i);S_CUTB(f)::QAB1(G)
- B(b);P_PINQ(G),S_CUTR(i)::B(C)+P(H)
- B(f);S_CUTR(h)::S(J)
- S(e);N_GUARD::R1(K),XP(d)
- P(g);::QAB1(G),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).