MESON Chess Problem Database
Problem Display
PID: 83532 (1n6/2N1p3/3P2Kp/R1BNkPp1/3p3Q/r6p/p3rR2/bbn5 w - - 0 1)
Ellerman, Arnoldo
Good Companions, 1920
#2
9 + 13
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rb2
- 2.Qxd4#
- 1...Rc3
- 2.Qxd4#
- 1...Bxf5+
- 2.Rxf5#
- 1...Sd3
- 2.Rxe2#
- 1...g4
- 2.Qxe7#
- 1...Rb2
- Tries
- 1.Sc3?
- threat
- 2.Bxa3#
- 2.Qg3#
- 2.Qxd4#
- 1...Bxf5+
- 2.Rxf5#
- 1...Rxf2
- 2.Bxa3#
- 2.Qxd4#
- 1...Rxc3
- 2.Qxd4#
- 1...Rxa5
- 2.Qg3#
- 2.Qxd4#
- 1...dxc3
- 2.Bxa3#
- 2.Qd4#
- 1...gxh4
- 2.Bxa3#
- 1...exd6
- 2.Bxd4#
- 2.Qg3#
- 2.Qxd4#
- 1...Rb2
- 2.Qg3#
- 2.Qxd4#
- 1...Rd2
- 2.Bxa3#
- 2.Qg3#
- 1...Re3
- 2.Bxa3#
- 2.Qxd4#
- 1...Re4
- 2.Bxa3#
- 1...Rb3
- 2.Bb4#
- 2.Qg3#
- 2.Qxd4#
- 1...Ra4
- 2.Qg3#
- 1...Bd3
- 2.Qg3#
- 2.Qxd4#
- 1...Be4
- 2.Qg3#
- 1...Sb3
- 2.Qg3#
- 1...Sd3
- 2.Rxe2#
- 2.Qxd4#
- 1...Sa6
- 2.Qg3#
- 2.Qxd4#
- 1...Sc6
- 2.Qg3#
- 1...Sd7
- 2.Qg3#
- 2.Qxd4#
- 1...d3
- 2.Bxa3#
- 2.Qg3#
- 2.Qd4#
- 1...g4
- 2.Bxa3#
- 2.Qg3#
- 2.Qxe7#
- 1...Bxc3!
- threat
- 1.dxe7?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Bxf5+
- 2.Rxf5#
- 1...Rxf2
- 2.e8Q#
- 2.e8R#
- 1...Rxa5
- 2.e8Q#
- 2.e8R#
- 1...gxh4
- 2.e8Q#
- 2.e8R#
- 1...g4
- 2.e8Q#
- 2.e8R#
- 1...Rc2
- 2.e8Q#
- 2.e8R#
- 1...Re1
- 2.e8Q#
- 2.e8R#
- 1...Rb2
- 2.Qxd4#
- 2.e8Q#
- 2.e8R#
- 1...Rd2
- 2.e8Q#
- 2.e8R#
- 1...Ree3
- 2.e8Q#
- 2.e8R#
- 1...Re4
- 2.e8Q#
- 2.e8R#
- 1...Rb3
- 2.e8Q#
- 2.e8R#
- 1...Rc3
- 2.Qxd4#
- 2.e8Q#
- 2.e8R#
- 1...Rd3
- 2.e8Q#
- 2.e8R#
- 1...Rae3
- 2.e8Q#
- 2.e8R#
- 1...Rf3
- 2.e8Q#
- 2.e8R#
- 1...Rg3
- 2.e8Q#
- 2.e8R#
- 1...Ra4
- 2.e8Q#
- 2.e8R#
- 1...Bb2
- 2.e8Q#
- 2.e8R#
- 1...Bc3
- 2.e8Q#
- 2.e8R#
- 1...Bc2
- 2.e8Q#
- 2.e8R#
- 1...Bd3
- 2.e8Q#
- 2.e8R#
- 1...Be4
- 2.e8Q#
- 2.e8R#
- 1...Sb3
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.Rxe2#
- 2.e8Q#
- 2.e8R#
- 1...Sa6
- 2.e8Q#
- 2.e8R#
- 1...Sd7
- 2.e8Q#
- 2.e8R#
- 1...h2
- 2.e8Q#
- 2.e8R#
- 1...d3
- 2.e8Q#
- 2.e8R#
- 1...h5
- 2.e8Q#
- 2.e8R#
- 1...Sc6!
- threat
- 1.Sc3?
- Keys
- 1.Sf6!
- threat
- 2.Bxa3#
- 1...Bxf5+
- 2.Rxf5#
- 1...Rxa5
- 2.Qg3#
- 1...exd6
- 2.Bxd4#
- 1...Rc2
- 2.Qe4#
- 1...Rb2
- 2.Qxd4#
- 1...Rb3
- 2.Bb4#
- 1...Rc3
- 2.Qxd4#
- 1...Rd3
- 2.Ba3#
- 2.Bb4#
- 1...Rae3
- 2.Ba3#
- 2.Bb4#
- 1...Rf3
- 2.Ba3#
- 2.Bb4#
- 1...Rg3
- 2.Ba3#
- 2.Bb4#
- 2.Qxg3#
- 1...Ra4
- 2.Qg3#
- 1...Bc3
- 2.Qg3#
- 1...Bd3
- 2.Qg3#
- 1...Be4
- 2.Sg4#
- 1...Sb3
- 2.Qg3#
- 1...Sd3
- 2.Rxe2#
- 1...Sa6
- 2.Sd7#
- 1...Sc6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 1
- Sets
- R(e);S_CUTB(a)::QAB1(B),XP(h)
- R(f);S_CUTB(a)::QAB1(B),XP(h)
- B(b);CHECK,OGATE,XP(F)::R1(A),XB(b)
- S(c);N_GUARD,N_PINP(F),S_CUTB(b),S_CUTR(f)::R(A),XR(e)
- P(j);OGATE::QAR2(B),XP(l)
- Tries
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- B(b);CHECK,OGATE,XP(F)::R1(A),XB(b)
- R(f);XS(E)::QAB1(B),XP(h)
- P(j);XQ(B)::R(C)+B(D),XR(f)
- R(e);N_PINP(F)::R(C)+B(D),XR(f)
- R(f);::QAB(B)
- B(b);::QAB(B)
- S(c);::QAB(B)
- S(m);::QAB(B)
- Refutation
- B(a);XS(E)
- Try
- P(G);XP(l)
- Threat
- P=Q
- Vars
- B(b);CHECK,OGATE,XP(F)::R1(A),XB(b)
- R(e);XR(A)::P=Q
- R(f);XR(C)::P=Q
- P(j);XQ(B)::P=Q
- P(j);::P=Q
- R(e);N_PINP(F)::P=Q
- R(e);::P=Q
- R(f);::P=Q
- R(f);N_PINP(F)::P=Q
- B(a);::P=Q
- B(b);::P=Q
- S(c);::P=Q
- S(m);::P=Q
- P(g);::P=Q
- P(h);N_PINP(F)::P=Q
- P(k);::P=Q
- Refutation
- S(m);
- Try
- Actual
- S(E);
- Threat
- R(C)+B(D),XR(f)
- Vars
- B(b);CHECK,OGATE,XP(F)::R1(A),XB(b)
- R(f);N_GUARD,XR(C)::QAB(B)
- P(l);SBLOCK,XP(G)::R(C)+B(D),DCHECK,XP(h)
- R(e);N_GUARD,N_PINP(F),S_CUTB(b)::QAR1(B)
- R(e);S_CUTB(a)::QAB1(B),XP(h)
- R(f);N_GUARD::R(C)+B(D)
- R(f);S_CUTB(a)::QAB1(B),XP(h)
- R(f);N_GUARD::QAB(B)
- B(a);S_CUTR(f)::QAB(B)
- B(b);S_CUTR(f)::QAB(B)
- B(b);SBLOCK::S(E)
- S(c);S_CUTR(f)::QAB(B)
- S(c);N_GUARD,N_PINP(F),S_CUTB(b),S_CUTR(f)::R(A),XR(e)
- S(m);N_GUARD::S(E)
- S(m);N_GUARD::S(E),XS(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).