MESON Chess Problem Database
Problem Display
PID: 204411 (Kn2R3/b5r1/2Np1p2/4q3/8/3Pk2N/2R1P3/Q5r1 w - - 0 1)
von Wardener, Friedrich Freiherr
L'Alfiere di Re, 1925
#2
8 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qe4
- 2.Rxe4#
- 1...Qe6
- 2.Rxe6#
- 1...Qe7
- 2.Qxa7#
- 1...Rc1
- 2.Qxc1#
- 1...R1g2
- 2.Qc1#
- 1...R1g3
- 2.Qc1#
- 1...R1g4
- 2.Qc1#
- 1...R1g5
- 2.Qc1#
- 1...R1g6
- 2.Qc1#
- 1...R7g2
- 2.Qxa7#
- 1...R7g3
- 2.Qxa7#
- 1...R7g5
- 2.Qxa7#
- 1...R7g6
- 2.Qxa7#
- 1...Rb7
- 2.Qxg1#
- 1...Rc7
- 2.Qxg1#
- 1...Rd7
- 2.Qxg1#
- 1...Re7
- 2.Qxg1#
- 1...Rf7
- 2.Qxg1#
- 1...Rh7
- 2.Qxg1#
- 1...Rg8
- 2.Qxa7#
- 1...Bd4
- 2.Qxd4#
- 1...Qe4
- Tries
- 1.Sb4?
- threat
- 2.Sd5#
- 1...Re7
- 2.Qxg1#
- 1...d5
- 2.Sxd5#
- 1...Rxa1!
- threat
- 1.Qe1?
- threat
- 2.Qd2#
- 2.Qf2#
- 1...Sxc6
- 2.Qf2#
- 1...Rf1
- 2.Qd2#
- 1...R1g2
- 2.Qd2#
- 2.Qc1#
- 1...R7g2
- 2.Qd2#
- 1...Rxe1!
- threat
- 1.Qf1?
- threat
- 2.Qf2#
- 2.Qf3#
- 2.Qf4#
- 1...Sxc6
- 2.Qf2#
- 2.Qf4#
- 1...R1g2
- 2.Qc1#
- 2.Qf3#
- 2.Qf4#
- 1...R1g3
- 2.Qc1#
- 2.Qf2#
- 2.Qf4#
- 1...R1g4
- 2.Qc1#
- 2.Qf2#
- 2.Qf3#
- 1...R7g2
- 2.Qf3#
- 2.Qf4#
- 1...R7g3
- 2.Qf2#
- 2.Qf4#
- 1...R7g4
- 2.Qf2#
- 2.Qf3#
- 1...Re7
- 2.Qxg1#
- 2.Qf2#
- 2.Qf3#
- 1...Rxf1!
- threat
- 1.Sb4?
- Keys
- 1.Se7!
- threat
- 2.Sd5#
- 2.Sf5#
- 1...Qe4+
- 2.Sd5#
- 1...Qd5+
- 2.Sxd5#
- 1...Qxa1
- 2.Sf5#
- 1...Qxe7
- 2.Qxa7#
- 1...Rxa1
- 2.Sf5#
- 1...Rxe7
- 2.Qxg1#
- 1...Qb2
- 2.Sf5#
- 1...Qc3
- 2.Sf5#
- 1...Qf5
- 2.Sd5#
- 2.Sxf5#
- 1...Rf1
- 2.Sd5#
- 1...R1g5
- 2.Sd5#
- 1...R7g5
- 2.Sd5#
- 1...d5
- 2.Sxd5#
- 2.Sf5#
- 1...f5
- 2.Sd5#
- 2.Sxf5#
- threat
- 1.Se7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 6
- REMOVED MATES = 16
- Sets
- Q(c);OGATE,P_PINS(F)::R1(H),XQ(c)
- Q(c);OGATEB::R(H),XQ(c)
- Q(c);S_CUTR(g)::QAB(A),XB(f)
- R(a);N_GUARD::QAB(A),XR(a)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::QAB(A),XB(f)
- R(g);N_GUARD::QAB(A),XR(a)
- R(g);N_GUARD,N_SPINQ(c)::QAB(A),XR(a)
- B(f);N_GUARD::QAB1(A),XB(f)
- Tries
- Try
- S(F);
- Threat
- S(F)
- Vars
- R(g);N_GUARD,N_SPINQ(c)::QAB(A),XR(a)
- P(d);::S(F),XP(d)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(h);XS(F)::QAB1(A)
- R(a);::QAB1(A)
- R(g);::QAB1(A)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(3)
- Refutation
- R(a);XQ(A)
- Try
- Actual
- S(F);N_PINQ(c)
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK::S(F)
- Q(c);CHECK::R(H)+S(F),DCHECK,XQ(c)
- Q(c);XQ(A)::R(H)+S(F),DCHECK
- Q(c);N_GUARD,P_SPINQ(c),XS(F)::QAB(A),XB(f)
- R(a);XQ(A)::S(F)
- R(g);N_GUARD,XS(F)::QAB(A),XR(a)
- Q(c);::R(H)+S(F),DCHECK
- R(a);::S(F)
- R(g);::S(F)
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).