MESON Chess Problem Database
Problem Display
PID: 83586 (bQ6/4B3/p4q1N/4RpN1/Rnrkp3/7r/BPPnPP1P/3K4 w - - 0 1)
Ellerman, Arnoldo
Good Companions, 1922
#2
13 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxe7
- 2.Sxf5#
- 1...Qg7
- 2.Se6#
- 2.Sxf5#
- 1...Qh8
- 2.Se6#
- 2.Sxf5#
- 1...Qb6
- 2.Sxf5#
- 1...Qc6
- 2.Sxf5#
- 1...Qe6
- 2.Sxe6#
- 1...Qf8
- 2.Se6#
- 1...Rxh2
- 2.e3#
- 1...Rh4
- 2.e3#
- 1...Rh5
- 2.e3#
- 1...Rxh6
- 2.e3#
- 1...Rc5
- 2.Bxc5#
- 1...Rc6
- 2.Rd5#
- 1...Sf3
- 2.e3#
- 1...Sxa2
- 2.Bc5#
- 1...Sxc2
- 2.Bc5#
- 1...Sd3
- 2.c3#
- 1...Sc6
- 2.Bc5#
- 1...Qxe7
- Tries
- 1.Sf3+?
- 1...Sxf3
- 2.e3#
- 1...exf3
- 2.e3#
- 1...Rxf3!
- 1...Sxf3
- 1.Bxf6?
- threat
- 2.Se6#
- 2.Sxf5#
- 2.Rea5#
- 2.Rb5#
- 2.Rxf5#
- 1...Rxh6
- 2.Se6#
- 2.e3#
- 1...Sd5
- 2.Se6#
- 1...Rf3
- 2.Se6#
- 2.Rea5#
- 2.Rb5#
- 2.Rxf5#
- 1...Rc5
- 2.Se6#
- 2.Sxf5#
- 2.Rxe4#
- 2.Rd5#
- 1...Rc6
- 2.Sxf5#
- 2.Rd5#
- 1...Sf3
- 2.Se6#
- 2.Sxf5#
- 2.e3#
- 1...Sd3
- 2.Se6#
- 2.Sxf5#
- 2.c3#
- 1...Sc6
- 2.Se6#
- 2.Sxf5#
- 2.Qd6#
- 2.Qb6#
- 1...f4
- 2.Se6#
- 2.Sf5#
- 2.Rea5#
- 2.Rb5#
- 2.Rf5#
- 1...a5
- 2.Se6#
- 2.Sxf5#
- 2.Rexa5#
- 2.Rb5#
- 2.Rxf5#
- 1...Bd5!
- threat
- 1.Rb5?
- threat
- 2.Bxf6#
- 1...Qxg5
- 2.Qe5#
- 1...Qxe7
- 2.Sxf5#
- 1...Qxh6
- 2.Qe5#
- 1...Rxh6
- 2.e3#
- 1...Qe5
- 2.Qxe5#
- 1...Qg7
- 2.Se6#
- 2.Sxf5#
- 1...Qh8
- 2.Se6#
- 2.Sxf5#
- 2.Qxh8#
- 1...Qb6
- 2.Sxf5#
- 2.Qe5#
- 1...Qc6
- 2.Sxf5#
- 2.Qe5#
- 1...Qd6
- 2.Sxf5#
- 1...Qe6
- 2.Sxe6#
- 1...Qg6
- 2.Qe5#
- 1...Qf7
- 2.Qe5#
- 1...Qf8
- 2.Se6#
- 2.Qe5#
- 1...Rc5
- 2.Bxc5#
- 1...Rc6
- 2.Rd5#
- 1...Sf3
- 2.e3#
- 1...Sd3
- 2.c3#
- 1...Sd5
- 2.Bc5#
- 1...Sc6
- 2.Qb6#
- 1...axb5!
- threat
- 1.Sf3+?
- Keys
- 1.Rea5!
- threat
- 2.Bxf6#
- 1...Qxg5
- 2.Qe5#
- 1...Qxe7
- 2.Sxf5#
- 1...Qxh6
- 2.Qe5#
- 1...Rxh6
- 2.e3#
- 1...Qe5
- 2.Qxe5#
- 1...Qg7
- 2.Se6#
- 2.Sxf5#
- 1...Qh8
- 2.Se6#
- 2.Sxf5#
- 2.Qxh8#
- 1...Qb6
- 2.Sxf5#
- 2.Qe5#
- 1...Qc6
- 2.Sxf5#
- 2.Qe5#
- 1...Qd6
- 2.Sxf5#
- 1...Qe6
- 2.Sxe6#
- 1...Qg6
- 2.Qe5#
- 1...Qf7
- 2.Qe5#
- 1...Qf8
- 2.Se6#
- 2.Qe5#
- 1...Rc5
- 2.Bxc5#
- 1...Rc6
- 2.Rd5#
- 1...Sf3
- 2.e3#
- 1...Sd3
- 2.c3#
- 1...Sd5
- 2.Bc5#
- 1...Sc6
- 2.Qb6#
- threat
- 1.Rea5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 8
- Sets
- Q(i);N_GUARD,XB(L)::S(K),XP(g)
- Q(i);N_GUARD::S(K),XP(g)
- Q(i);N_GUARD::S(J),XQ(i)
- Q(i);N_GUARD::S(J)
- R(b);N_GUARD,XP(G)::P(E)
- R(b);N_GUARD::P(E)
- R(b);N_GUARD,XS(K)::P(E)
- R(d);N_GUARD,P_SPINS(c)::B(L),XR(d)
- R(d);P_SPINS(c),S_CUTB(j)::R1(I)
- S(a);S_CUTR(b)::P(E)
- S(c);P_SPINR(d),XB(B)::B(L)
- S(c);P_SPINR(d),XP(D)::B(L)
- S(c);P_SPINR(d),S_CUTR(b)::P(D)
- S(c);P_SPINR(d)::B(L)
- Tries
- Try
- S(J);CHECK
- Vars
- S(a);XS(J)::P(E)
- P(f);XS(J)::P(E)
- Refutation
- R(b);XS(J)
- Try
- B(L);XQ(i)
- Threat
- DUALS(5)
- Vars
- S(c);P_SPINR(d)::S(J)
- Refutation
- B(j);
- Try
- R(I);
- Threat
- B(L),XQ(i)
- Vars
- Q(i);N_GUARD,XS(J)::QAB1(M)
- Q(i);N_GUARD,XB(L)::S(K),XP(g)
- Q(i);N_GUARD,XS(K)::QAB1(M)
- R(b);N_GUARD,XS(K)::P(E)
- Q(i);N_GUARD::QAB1(M),XQ(i)
- Q(i);N_GUARD::S(K),XP(g)
- Q(i);N_GUARD::S(J),XQ(i)
- Q(i);N_GUARD::QAB1(M)
- R(d);N_GUARD,P_SPINS(c)::B(L),XR(d)
- R(d);P_SPINS(c),S_CUTB(j)::R1(I)
- S(a);S_CUTR(b)::P(E)
- S(c);P_SPINR(d),S_CUTR(b)::P(D)
- S(c);P_SPINR(d),SBLOCK::B(L)
- S(c);P_SPINR(d),S_CUTQ(i)::QAB(M)
- Refutation
- P(h);XR(I)
- Try
- Actual
- R(I);
- Threat
- B(L),XQ(i)
- Vars
- Q(i);N_GUARD,XS(J)::QAB1(M)
- Q(i);N_GUARD,XB(L)::S(K),XP(g)
- Q(i);N_GUARD,XS(K)::QAB1(M)
- R(b);N_GUARD,XS(K)::P(E)
- Q(i);N_GUARD::QAB1(M),XQ(i)
- Q(i);N_GUARD::S(K),XP(g)
- Q(i);N_GUARD::S(J),XQ(i)
- Q(i);N_GUARD::QAB1(M)
- R(d);N_GUARD,P_SPINS(c)::B(L),XR(d)
- R(d);P_SPINS(c),S_CUTB(j)::R1(I)
- S(a);S_CUTR(b)::P(E)
- S(c);P_SPINR(d),S_CUTR(b)::P(D)
- S(c);P_SPINR(d),SBLOCK::B(L)
- S(c);P_SPINR(d),S_CUTQ(i)::QAB(M)
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).