MESON Chess Problem Database
Problem Display
PID: 204416 (1q3b2/1Q2p3/8/1prB3N/2N5/3k4/4R3/Bn3K2 w - - 0 1)
Wrobel, Marian
L'Alfiere di Re, 1925
#2
7 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qf4+
- 2.Sxf4#
- 1...Qe5
- 2.Sxe5#
- 1...Qa7
- 2.Se5#
- 2.Sf4#
- 1...Qxb7
- 2.Se5#
- 2.Sf4#
- 1...Qa8
- 2.Se5#
- 2.Sf4#
- 1...Qc8
- 2.Se5#
- 2.Sf4#
- 1...Qd8
- 2.Se5#
- 2.Sf4#
- 1...Qe8
- 2.Se5#
- 2.Sf4#
- 1...Rxd5
- 2.Qxd5#
- 1...Rc7
- 2.Se5#
- 2.Sf4#
- 1...Sd2+
- 2.Rxd2#
- 1...Sa3
- 2.Rd2#
- 1...Sc3
- 2.Rd2#
- 1...bxc4
- 2.Be4#
- 1...e6
- 2.Qh7#
- 1...Qf4+
- Tries
- 1.Qxb5?
- threat
- 2.Se5#
- 2.Be4#
- 1...Qf4+
- 2.Sxf4#
- 1...Sd2+
- 2.Rxd2#
- 1...Qxb5
- 2.Se5#
- 2.Sf4#
- 1...Rxc4
- 2.Bxc4#
- 2.Be4#
- 2.Qxc4#
- 1...Rxd5
- 2.Se5#
- 2.Qxd5#
- 1...Sc3
- 2.Rd2#
- 1...Qe5
- 2.Sxe5#
- 2.Qxb1#
- 1...Qb7
- 2.Se5#
- 2.Sf4#
- 1...Qa8
- 2.Se5#
- 2.Sf4#
- 2.Qxb1#
- 1...e5
- 2.Sxe5#
- 2.Be4#
- 1...Rxb5!
- threat
- 1.Qxe7?
- threat
- 2.Qe3#
- 2.Qe4#
- 2.Qh7#
- 1...Qf4+
- 2.Sxf4#
- 1...Sd2+
- 2.Rxd2#
- 1...Rxc4
- 2.Qe3#
- 1...Rxd5
- 2.Qe4#
- 1...Sc3
- 2.Rd2#
- 2.Qe3#
- 1...Qg3
- 2.Qe4#
- 1...Qe5
- 2.Sxe5#
- 1...Qd6
- 2.Qe3#
- 2.Qe4#
- 1...Qa7
- 2.Se5#
- 2.Sf4#
- 2.Qe3#
- 2.Qe4#
- 1...Qc7
- 2.Qe3#
- 2.Qe4#
- 1...Qb6
- 2.Se5#
- 2.Sf4#
- 2.Qe3#
- 2.Qe4#
- 1...Qb7
- 2.Se5#
- 2.Sf4#
- 2.Qe3#
- 2.Qe4#
- 1...Qc8
- 2.Se5#
- 2.Sf4#
- 2.Qe3#
- 2.Qe4#
- 1...Qe8
- 2.Se5#
- 2.Sf4#
- 1...Rc6
- 2.Qe3#
- 2.Qe4#
- 1...Rc7
- 2.Se5#
- 2.Sf4#
- 2.Qe3#
- 2.Qe4#
- 1...Bh6
- 2.Qe4#
- 2.Qh7#
- 1...Bg7
- 2.Qe3#
- 2.Qe4#
- 1...Bxe7!
- threat
- 1.Qxb8?
- threat
- 2.Se5#
- 2.Sf4#
- 2.Qg3#
- 1...Sd2+
- 2.Rxd2#
- 1...Rxc4
- 2.Qg3#
- 1...bxc4
- 2.Sf4#
- 2.Be4#
- 2.Qg3#
- 2.Qxb1#
- 1...Sc3
- 2.Rd2#
- 1...Rc7
- 2.Se5#
- 2.Sf4#
- 1...Bh6
- 2.Se5#
- 1...Bg7
- 2.Sf4#
- 2.Qg3#
- 1...e5
- 2.Sxe5#
- 1...Rxd5!
- threat
- 1.Qxb5?
- Keys
- 1.Qd7!
- threat
- 2.Qf5#
- 1...Qf4+
- 2.Sxf4#
- 1...Sd2+
- 2.Rxd2#
- 1...Rxc4
- 2.Be4#
- 1...Rxd5
- 2.Qxd5#
- 1...Sc3
- 2.Rd2#
- 1...Qe5
- 2.Sxe5#
- 1...Qc8
- 2.Se5#
- 2.Sf4#
- 1...e5
- 2.Qh3#
- 1...e6
- 2.Qh7#
- threat
- 1.Qd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(f);CHECK,N_GUARD::S(F),XQ(f)
- Q(f);N_GUARD::S(D),XQ(f)
- R(d);OGATE,XB(E)::QAR2(G),XR(d)
- S(a);CHECK,N_GUARD::R1(C),XS(a)
- S(a);N_GUARD::R1(C)
- P(c);SBLOCK,XS(D)::B(E)
- P(e);OGATE::QAB(G)
- Tries
- Try
- Q(G);XP(c)
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,N_GUARD::S(F),XQ(f)
- S(a);CHECK,N_GUARD::R1(C),XS(a)
- S(a);N_GUARD::R1(C)
- Refutation
- R(d);XQ(G)
- Try
- Q(G);XP(e)
- Threat
- DUALS(3)
- Vars
- Q(f);CHECK,N_GUARD::S(F),XQ(f)
- S(a);CHECK,N_GUARD::R1(C),XS(a)
- R(d);XS(D)::QAR1(G)
- R(d);XB(E)::QAB1(G)
- Q(f);::QAB1(G)
- Q(f);N_GUARD::S(D),XQ(f)
- Refutation
- B(g);XQ(G)
- Try
- Q(G);XQ(f)
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::R1(C),XS(a)
- R(d);XS(D)::QAR(G)
- S(a);N_GUARD::R1(C)
- B(g);::S(D)
- P(e);::S(D),XP(e)
- Refutation
- R(d);XB(E)
- Try
- Actual
- Q(G);
- Threat
- QAB(G)
- Vars
- Q(f);CHECK,N_GUARD::S(F),XQ(f)
- S(a);CHECK,N_GUARD::R1(C),XS(a)
- R(d);SBLOCK,XS(D)::QAR(G)+B(E),DCHECK
- R(d);OGATE,P_SPINR(d),XB(E)::QAR2(G),XR(d)
- S(a);N_GUARD::R1(C)
- Q(f);N_GUARD::S(D),XQ(f)
- P(e);S_CUTQ(f)::QAR(G)
- P(e);OGATE::QAB(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).