MESON Chess Problem Database
Problem Display
PID: 204386 (6K1/B4P2/4P3/1QPp4/1p1k1n1N/1rR1R1pb/1b5n/q7 w - - 0 1)
Peter, Rudolf
L'Alfiere di Re, 1925
#2
9 + 10
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.c6#
- 1...Qc1
- 2.c6#
- 1...Qd1
- 2.c6#
- 1...Qe1
- 2.c6#
- 1...Qf1
- 2.c6#
- 1...Qg1
- 2.c6#
- 1...Qh1
- 2.c6#
- 1...Ra3
- 2.Qxb4#
- 1...Ba3
- 2.c6#
- 1...Bf1
- 2.Sf5#
- 1...Bg2
- 2.Sf5#
- 1...Bf5
- 2.Sxf5#
- 1...Sf1
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sg4
- 2.Sf3#
- 2.Sf5#
- 1...Se2
- 2.Qd3#
- 1...Sg2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sh5
- 2.Qd3#
- 1...Sxe6
- 2.Qd3#
- 1...Sg6
- 2.Qd3#
- 1...Qb1
- Tries
- 1.f8Q?
- threat
- 2.Qg7#
- 2.Qxf4#
- 2.Qf6#
- 1...Qxa7
- 2.Qxf4#
- 2.Qf6#
- 1...Rxc3
- 2.Qxf4#
- 1...Bxc3
- 2.Qxf4#
- 1...Sxe6
- 2.Qd3#
- 2.Qf6#
- 1...bxc3
- 2.Qxf4#
- 1...Sd3
- 2.Qxd3#
- 1...Qb1
- 2.Qg7#
- 2.Qf6#
- 2.c6#
- 1...Qf1
- 2.Qg7#
- 2.Qf6#
- 2.c6#
- 1...Qh1
- 2.Qg7#
- 2.Qf6#
- 2.c6#
- 1...Bg2
- 2.Sf5#
- 2.Qg7#
- 2.Qf6#
- 1...Bf5
- 2.Sxf5#
- 2.Qg7#
- 2.Qf6#
- 1...Sf3
- 2.Sxf3#
- 2.Qxf4#
- 1...Sg4
- 2.Sf3#
- 2.Sf5#
- 2.Qxf4#
- 1...Se2
- 2.Qd3#
- 2.Qg7#
- 2.Qf6#
- 1...Sg2
- 2.Qd3#
- 2.Qg7#
- 2.Qf6#
- 1...Sh5
- 2.Qd3#
- 1...Sg6
- 2.Qd3#
- 1...Bxe6+!
- threat
- 1.f8Q?
- Keys
- 1.Qf1!
- threat
- 2.Qxf4#
- 1...Qxf1
- 2.c6#
- 1...Bxf1
- 2.Sf5#
- 1...Sxf1
- 2.Sf3#
- 1...Sxe6
- 2.Qd3#
- 2.Qf6#
- 1...Sd3
- 2.Qxd3#
- 1...Qb1
- 2.c6#
- 1...Bg2
- 2.Sf5#
- 1...Bf5
- 2.Sxf5#
- 1...Sf3
- 2.Sxf3#
- 1...Se2
- 2.Qf6#
- 1...Sg2
- 2.Qd3#
- 2.Qf6#
- 1...Sh5
- 2.Qd3#
- 1...Sg6
- 2.Qd3#
- threat
- 1.Qf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD::B(G)+P(E)
- R(d);N_GUARD::QAR2(D),XP(g)
- B(b);S_CUTQ(a)::B(G)+P(E)
- B(f);N_GUARD::S(C)
- B(f);N_GUARD::S(C),XB(f)
- S(c);N_GUARD::S(C)
- S(c);N_GUARD::S(C),XS(c)
- S(i);N_GUARD::QAR1(D)
- S(i);N_GUARD::QAR1(D),XS(i)
- S(i);N_GUARD,XP(F)::QAR1(D)
- Tries
- Try
- P(H);
- Threat
- DUALS(3)
- Vars
- R(d);XR(A)::QAR2(H),XS(i)
- B(b);XR(A)::QAR2(H),XS(i)
- P(g);XR(A)::QAR2(H),XS(i)
- S(i);N_GUARD::QAR1(D),XS(i)
- S(i);N_GUARD::QAR1(D)
- Refutation
- B(f);CHECK,XP(F)
- Try
- Actual
- Q(D);
- Threat
- QAR2(D),XS(i)
- Vars
- Q(a);N_GUARD,XQ(D)::B(G)+P(E)
- B(f);N_GUARD,XQ(D)::S(C)
- S(c);N_GUARD,XQ(D)::S(C)
- S(i);N_GUARD::QAR1(D),XS(i)
- Q(a);N_GUARD::B(G)+P(E)
- B(f);N_GUARD::S(C)
- B(f);N_GUARD::S(C),XB(f)
- S(c);N_GUARD::S(C),XS(c)
- S(i);OGATE::QAB(D)
- S(i);N_GUARD::QAR1(D)
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).