MESON Chess Problem Database
Problem Display
PID: 201526 (1r1RN3/r1P1K1p1/1ppn1PP1/1b1k4/N1nPp3/b7/B1QR4/q7 w - - 0 1)
Somma, Francesco
L'Alfiere di Re, 1922
#2
11 + 12
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Sxc3#
- 1...Qb1
- 2.Sc3#
- 1...Qc1
- 2.Sc3#
- 1...Qd1
- 2.Sc3#
- 1...Qe1
- 2.Sc3#
- 1...Qf1
- 2.Sc3#
- 1...Qg1
- 2.Sc3#
- 1...Qh1
- 2.Sc3#
- 1...Qxa2
- 2.Sc3#
- 1...Rxc7+
- 2.Sxc7#
- 1...Ra8
- 2.Sxb6#
- 1...Rc8
- 2.Sxb6#
- 1...Rxd8
- 2.Sxb6#
- 1...Bc1
- 2.Rxd6#
- 1...Bb2
- 2.Rxd6#
- 1...Bxa4
- 2.Bxc4#
- 2.Qxc4#
- 1...e3
- 2.Qf5#
- 1...c5
- 2.Rxd6#
- 1...gxf6
- 2.Sxf6#
- 1...Qc3
- Tries
- 1.Sxd6?
- threat
- 2.Qxe4#
- 1...Bxd6+
- 2.Rxd6#
- 1...Qb1
- 2.Sc3#
- 1...Qe1
- 2.Sc3#
- 1...Qh1
- 2.Sc3#
- 1...e3
- 2.Qe4#
- 2.Qf5#
- 1...Rxc7+!
- threat
- 1.fxg7?
- threat
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rxc7+
- 2.Sxc7#
- 1...Qxa2
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rxa4
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rxd8
- 2.Sxb6#
- 2.Sf6#
- 1...Bxa4
- 2.Sf6#
- 2.Bxc4#
- 2.Qxc4#
- 2.g8Q#
- 2.g8B#
- 1...c5
- 2.Rxd6#
- 1...Qb2
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qc3
- 2.Sxc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qb1
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qc1
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qd1
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qe1
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qf1
- 2.Sc3#
- 1...Qg1
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Qh1
- 2.Sc3#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Ra5
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Ra6
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rab7
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Raa8
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rbb7
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rba8
- 2.Sxb6#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rc8
- 2.Sxb6#
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Bc1
- 2.Sf6#
- 2.Rxd6#
- 2.g8Q#
- 2.g8B#
- 1...Bb2
- 2.Sf6#
- 2.Rxd6#
- 2.g8Q#
- 2.g8B#
- 1...Bb4
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Bc5
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Ba6
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...e3
- 2.Sf6#
- 2.Qf5#
- 2.g8Q#
- 2.g8B#
- 1...Qxd4!
- threat
- 1.Sxd6?
- Keys
- 1.Qd1!
- threat
- 2.Qh5#
- 1...Rxc7+
- 2.Sxc7#
- 1...Qxd1
- 2.Sc3#
- 1...Qxa2
- 2.Sc3#
- 1...Rxd8
- 2.Sxb6#
- 1...gxf6
- 2.Sxf6#
- 1...e3
- 2.Qf3#
- 1...c5
- 2.Rxd6#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 11
- Sets
- Q(a);N_GUARD::S(D),XQ(a)
- Q(a);N_GUARD::S(D)
- Q(a);N_GUARD,N_SPINS(c),P_SPINS(i),XB(A)::S(D)
- R(j);CHECK,XP(H)::S(K),XR(j)
- R(l);N_GUARD::S(D),XP(g)
- R(l);N_GUARD,XR(J)::S(D),XP(g)
- B(b);N_GUARD::R1(J),XS(i)
- P(d);OGATE::QAR2(B)
- P(h);S_CUTB(b)::R1(J),XS(i)
- P(k);XP(F)::S(K),XP(k)
- Tries
- Try
- S(K);P_SPINS(K),XS(i)
- Threat
- QAB1(B),XP(d)
- Vars
- B(b);CHECK,OGATE,P_SPINB(b),XS(K)::R1(J),XB(b)
- Q(a);N_GUARD::S(D)
- Refutation
- R(j);CHECK,XP(H)
- Try
- P(F);XP(k)
- Threat
- DUALS(3)
- Vars
- R(j);CHECK,XP(H)::S(K),XR(j)
- P(h);S_CUTB(b)::R1(J),XS(i)
- Q(a);N_GUARD::S(D)
- Refutation
- Q(a);P_SPINQ(a),XP(E)
- Try
- Actual
- Q(B);
- Threat
- QAR(B)
- Vars
- R(j);CHECK,XP(H)::S(K),XR(j)
- Q(a);N_GUARD,XQ(B)::S(D)
- Q(a);N_GUARD,N_SPINS(c),P_SPINS(i),XB(A)::S(D)
- R(l);N_GUARD,XR(J)::S(D),XP(g)
- P(k);XP(F)::S(K),XP(k)
- P(d);OGATEB::QAB(B)
- P(h);S_CUTB(b)::R1(J),XS(i)
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).