MESON Chess Problem Database
Problem Display
PID: 201371 (Bn3Nn1/K4R1b/p1pp4/P3kPPp/2r1p1rP/1QP1N1P1/7B/8 w - - 0 1)
Belli, Nicolo
L'Alfiere di Re, 1922
#2
13 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxc3
- 2.Qxc3#
- 1...Ra4
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Rd4
- 2.Qe6#
- 1...Rc5
- 2.Qe6#
- 1...Rxg3
- 2.Bxg3#
- 1...Rf4
- 2.gxf4#
- 1...Rxh4
- 2.gxh4#
- 1...Rxg5
- 2.g4#
- 1...Bxf5
- 2.Rxf5#
- 1...Bg6
- 2.Sxg6#
- 1...Sd7
- 2.Sxd7#
- 1...Sf6
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...c5
- 2.Sxc4#
- 1...d5
- 2.Qxb8#
- 1...Rxc3
- Tries
- 1.Sxh7?
- 1...Rxc3
- 2.Qxc3#
- 1...Rxg3
- 2.Bxg3#
- 1...Rxh4
- 2.gxh4#
- 1...Rxg5
- 2.g4#
- 1...d5
- 2.Qxb8#
- 1...Ra4
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Rd4
- 2.Qe6#
- 1...Rc5
- 2.Qe6#
- 1...Rf4
- 2.gxf4#
- 1...Sf6
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...c5
- 2.Sxc4#
- 1...Sd7!
- 1...Rxc3
- 1.Bxc6?
- threat
- 2.Sxc4#
- 1...Rxc3
- 2.Qd5#
- 2.Qxc3#
- 1...Rxc6
- 2.Qd5#
- 2.Qe6#
- 1...Rxg3
- 2.Bxg3#
- 1...d5
- 2.Qxb8#
- 1...Ra4
- 2.Qd5#
- 2.Qe6#
- 1...Rb4
- 2.Qd5#
- 2.Qe6#
- 1...Rd4
- 2.Qe6#
- 1...Rc5
- 2.Qe6#
- 1...Sf6
- 2.Re7#
- 1...Sxc6+!
- threat
- 1.Bb7?
- 1...Rxc3
- 2.Qxc3#
- 1...Rxg3
- 2.Bxg3#
- 1...Rxh4
- 2.gxh4#
- 1...Rxg5
- 2.g4#
- 1...Bxf5
- 2.Rxf5#
- 1...Ra4
- 2.Qe6#
- 1...Rb4
- 2.Qe6#
- 1...Rd4
- 2.Qe6#
- 1...Rc5
- 2.Qe6#
- 1...Rf4
- 2.gxf4#
- 1...Bg6
- 2.Sxg6#
- 1...Sd7
- 2.Sxd7#
- 1...Sf6
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...c5
- 2.Sxc4#
- 1...d5!
- 1...Rxc3
- 1.Rf6?
- threat
- 2.Re6#
- 1...Rxc3
- 2.Qxc3#
- 1...Rxg3
- 2.Bxg3#
- 1...Bxf5
- 2.Rxf5#
- 1...Sxf6!
- threat
- 1.Rxh7?
- threat
- 2.Sg6#
- 1...Rxc3
- 2.Qxc3#
- 1...d5
- 2.Qxb8#
- 1...Se7
- 2.Rxe7#
- 1...Rxg5!
- threat
- 1.Qxc4?
- threat
- 2.Qe6#
- 2.Qd4#
- 1...Rxg3
- 2.Bxg3#
- 1...Bxf5
- 2.Rxf5#
- 2.Qd4#
- 1...c5
- 2.Qd5#
- 2.Qe6#
- 1...d5!
- threat
- 1.Qb4?
- 1...Rxc3
- 2.Qxc3#
- 1...Rxg3
- 2.Bxg3#
- 1...Rxh4
- 2.gxh4#
- 1...Rxg5
- 2.g4#
- 1...Bxf5
- 2.Rxf5#
- 1...Rd4
- 2.Qxd4#
- 2.cxd4#
- 1...Rc5
- 2.Qd4#
- 1...Rf4
- 2.gxf4#
- 1...Bg6
- 2.Sxg6#
- 1...Sd7
- 2.Sxd7#
- 1...Sf6
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...c5
- 2.Sxc4#
- 1...d5
- 2.Qxb8#
- 1...Rxb4!
- 1...Rxc3
- 1.Qxb8?
- threat
- 2.Sd7#
- 1...Rxg3
- 2.Bxg3#
- 1...Bxf5
- 2.Rxf5#
- 1...Sf6
- 2.Re7#
- 1...Rxc3!
- threat
- 1.Sxh7?
- Keys
- 1.Qb2!
- 1...Rxc3
- 2.Qxc3#
- 1...Rxg3
- 2.Bxg3#
- 1...Rxh4
- 2.gxh4#
- 1...Rxg5
- 2.g4#
- 1...Bxf5
- 2.Rxf5#
- 1...d5
- 2.Qxb8#
- 1...Ra4
- 2.c4#
- 1...Rb4
- 2.cxb4#
- 1...Rd4
- 2.cxd4#
- 1...Rc5
- 2.c4#
- 1...Rf4
- 2.gxf4#
- 1...Bg6
- 2.Sxg6#
- 1...Sd7
- 2.Sxd7#
- 1...Sf6
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...c5
- 2.Sxc4#
- 1...Rxc3
- 1.Qb2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(a);OGATE,XP(C)::QAB(B),XR(a)
- R(a);OGATE::QAR1(B)
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- R(c);OGATE::P(E),XR(c)
- R(c);OGATE,XP(F)::B(A)+P(E),XR(c)
- R(c);OGATE,XP(I)::B(A)+P(E)
- B(i);OGATE,XP(H)::R1(K),XB(i)
- B(i);N_GUARD::S(M),XB(i)
- S(j);N_GUARD::S(M),XS(j)
- S(k);N_GUARD::R(K)
- S(k);N_GUARD::R(K),XS(k)
- P(g);::S(D),XR(a)
- P(h);OGATEB::QAB(B),XS(j)
- Tries
- Try
- S(M);XB(i)
- Vars
- R(a);OGATE,XP(C)::QAB(B),XR(a)
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- R(c);OGATE,XP(F)::B(A)+P(E),XR(c)
- R(c);OGATE,XP(I)::B(A)+P(E)
- P(h);OGATEB::QAB(B),XS(j)
- R(a);OGATE::QAR1(B)
- R(c);OGATE::P(E),XR(c)
- S(k);N_GUARD::R(K)
- S(k);N_GUARD::R(K),XS(k)
- P(g);::S(D),XR(a)
- Refutation
- S(j);
- Try
- B(L);XP(g)
- Threat
- S(D),XR(a)
- Vars
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- P(h);OGATEB::QAB(B),XS(j)
- R(a);OGATE::QAR1(B)
- S(k);N_GUARD::R(K)
- Refutation
- S(j);CHECK,XB(L)
- Try
- B(L);
- Vars
- R(a);OGATE,XP(C)::QAB(B),XR(a)
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- R(c);OGATE,XP(F)::B(A)+P(E),XR(c)
- R(c);OGATE,XP(I)::B(A)+P(E)
- B(i);OGATE,XP(H)::R1(K),XB(i)
- R(a);OGATE::QAR1(B)
- R(c);OGATE::P(E),XR(c)
- B(i);N_GUARD::S(M),XB(i)
- S(j);N_GUARD::S(M),XS(j)
- S(k);N_GUARD::R(K)
- S(k);N_GUARD::R(K),XS(k)
- P(g);::S(D),XR(a)
- Refutation
- P(h);
- Try
- R(K);
- Threat
- R1(K)
- Vars
- R(a);OGATE,XP(C)::QAB(B),XR(a)
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- B(i);OGATE,XP(H)::R1(K),XB(i)
- Refutation
- S(k);XR(K)
- Try
- R(K);XB(i)
- Threat
- S(M)
- Vars
- R(a);OGATE,XP(C)::QAB(B),XR(a)
- P(h);OGATEB::QAB(B),XS(j)
- S(k);N_GUARD::R(K),XS(k)
- Refutation
- R(c);XP(I)
- Try
- Q(B);XR(a)
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- Refutation
- P(h);
- Try
- Q(B);
- Vars
- R(a);OGATE,XP(C)::QAB(B),XR(a)
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- R(c);OGATE,XP(F)::B(A)+P(E),XR(c)
- R(c);OGATE,XP(I)::B(A)+P(E)
- B(i);OGATE,XP(H)::R1(K),XB(i)
- R(a);OGATE::QAB1(B)
- R(c);OGATE::P(E),XR(c)
- B(i);N_GUARD::S(M),XB(i)
- S(j);N_GUARD::S(M),XS(j)
- S(k);N_GUARD::R(K)
- S(k);N_GUARD::R(K),XS(k)
- P(g);::S(D),XR(a)
- P(h);OGATEB::QAB(B),XS(j)
- Refutation
- R(a);XQ(B)
- Try
- Q(B);P_PINP(h),XS(j)
- Threat
- S(M)
- Vars
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- B(i);OGATE,XP(H)::R1(K),XB(i)
- S(k);N_GUARD::R(K)
- Refutation
- R(a);XP(C)
- Try
- Actual
- Q(B);
- Vars
- R(a);OGATE,P_SPINR(a),XP(C)::QAB(B),XR(a)
- R(c);OGATE,P_SPINR(c),XP(E)::B(A),XR(c)
- R(c);OGATE,XP(F)::B(A)+P(E),XR(c)
- R(c);OGATE,XP(I)::B(A)+P(E)
- B(i);OGATE,XP(H)::R1(K),XB(i)
- P(h);OGATEB::QAB(B),XS(j)
- R(a);OGATE::QAB(B)+P(C)
- R(a);OGATE::QAB(B)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(c);OGATE::P(E),XR(c)
- B(i);N_GUARD::S(M),XB(i)
- S(j);N_GUARD::S(M),XS(j)
- S(k);N_GUARD::R(K)
- S(k);N_GUARD::R(K),XS(k)
- P(g);::S(D),XR(a)
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).